GENII FRDS Maintenance and Troubleshooting Manual

Transcription

1 GENII FRDS Maintenance and Troubleshooting Manual Trotter Controls, Inc. Document# Page 1 of 56 Document# TROTTER CONTROLS, INC.

2 TROTTER CONTROLS, INC. Document# Page 2 of 56

3 Table of Contents REVISIONS...6 OVERVIEW...7 INTRODUCTION...7 GEN II FRDS FEATURES...7 Accurate and dependable coverage delivery...7 Highly reliable specific purpose control system Reliability FIRST...7 Redundant Systems to Insure Door Opening...8 Hydraulic system refinements...8 Benefits...8 CONSTANT FLOW RATE VERSUS CONSTANT GATE ANGLE...9 Constant Gate Angle Delivery Systems...9 Constant Flow Rate Delivery Systems...9 SYSTEM DESCRIPTION...10 MODES OF OPERATION...12 PILOT INTERFACE DETAILS...13 FOAM GALLONS DISPLAY...14 AUTO MODE OPERATION...14 SWITCH FUNCTIONS IN AUTO/TIMER MODE...14 DUAL ARMED LIGHT FUNCTIONALITY (AUTO/TIMER MODES)...15 TIMER MODE OPERATION...18 SPECIAL USES OF PANEL SWITCHES (AUTO/TIMER MODES)...20 LAMP TEST switch...20 NO switch...20 RUN PUMP switch...20 SPECIAL MODES OF OPERATION (AUTO/TIMER)...20 FUEL FERRY MODE...20 PILOT INTERFACE MIRROR MODE...21 Enabling/Disabling Mirror Mode...21 Activating Mirror Mode...22 De-activating Mirror Mode...22 BRIGHTNESS ADJUST MODE...22 FOAM INJECTION...22 MANUAL MODE OPERATION...23 SALVO SYSTEM ACTIVATION...23 AUTOMATIC SALVO ACTIVATION...24 PILOT ACTIVATED SALVO...24 AUTO SUPERVISOR ACTIVATED SALVO...24 MAN SYSTEM ACTIVATED SALVO...25 RECOVERY FROM AN AUTOMATIC SALVO CONDITION...25 SYSTEM TESTS...26 SYSTEM SELF DIAGNOSTIC TESTS SYSTEST MENU...26 PILOT (NO DOORS) SYSTEM TEST...27 PILOT (ALL) SYSTEM TEST...27 AUTO SALVO SYSTEM TEST...28 MAN SALVO SYSTEM TEST...28 Page 3 of 56 Document# TROTTER CONTROLS, INC.

4 MAINT SYSTEST MAINTENANCE PERSONNEL SYSTEM TEST...28 SALVO BUTTON TEST...29 SYSTEM TEST PERSISTENT ERRORS...30 Clearing Persistent SysTest Errors...30 MENU SYSTEM...31 Main Menu Maint Menu Config Menu SysTest Menu Error History Digital Inputs Digital Input Map Digital Outputs Digital Output Map Analog Inputs Analog Calibrate Err Msg Index/Counts Clear Errors Clear Err Counts Clear ErrHistory System Reset Save Memory Read EEprom Compare RAM/EE Logo/Version Leakage Table System Operation Parameters (Tweak) FRDS Menu Tree ERROR OVERVIEW...42 Reduced Accuracy Error Code Displayed: 112_Accuracy Loss Reduced Redundancy (AUTO/TIMER mode only) Error Code Displayed: 114_Redundancy Loss Reduced Accuracy & Redundancy (AUTO/TIMER mode only) Error Code Displayed: 113_Accur+Redun Loss Clearing Pump Errors SETTING SYSTEM PREFERENCES...44 MAINTENANCE...44 FUSE, RELAY, & STATUS LED LOCATION AND FUNCTION...44 PREVENTATIVE MAINTENANCE SCHEDULE...52 CALIBRATION & SETUP...53 MEMORY MANAGEMENT...53 UPDATING SYSTEM FIRMWARE...53 REFERENCE DOCUMENTS...54 MANUALS ~ GEN II FRDS Operators Manual, Trotter Controls, Inc TECHNICAL PUBLICATIONS & TEST SPECIFICATIONS...54 TP-1000 ~ Constant Flow Rate vs. Constant Gate Angle, Trotter Controls, Inc...54 TP-1002 ~ GEN II FRDS System Description, Trotter Controls, Inc TS-0005 ~ GEN II FRDS Maintenance System Tests, Trotter Controls, Inc...54 ENGINEERING REPORTS...54 ER-0074 ~ GEN II FRDS System Operation Parameters, Trotter Controls, Inc...54 ER-0075 ~ GEN II FRDS System Error Codes and Resolution, Trotter Controls, Inc...54 ER-0077 ~ Preventative Maintenance Schedule, Trotter Controls, Inc PROCESS SPECIFICATIONS...54 PS-0030 ~ GEN II FRDS Pressure Relief Valve Adjustment, Trotter Controls, Inc TROTTER CONTROLS, INC. Document# Page 4 of 56

5 PS-0031 ~ Hopper Contents and Gatebox Sensor Adjustment, Trotter Controls, Inc...54 PS-0032 ~ Calibration Dumping Matrix, Trotter Controls, Inc...54 PS-0033 ~ Hydraulic Flushing Procedure, Trotter Controls, Inc PS-0035 ~ GEN II FRDS Memory Management, Trotter Controls, Inc...54 PRODUCT DATASHEETS...54 DS-0001 Datasheet ~ Pilot Interface (VFD) FRDS GENII, Trotter Controls, Inc DS-0002 Datasheet ~ Relay Enclosure FRDS GENII, Trotter Controls, Inc...54 DS-0003 Datasheet ~ Side Loader Gage (VFD) FRDS GENII, Trotter Controls, Inc DS-0015 Datasheet ~ Side Loader Gage (LCD) FRDS GENII, Trotter Controls, Inc DS-0023 Datasheet ~ Pilot Interface (LCD) FRDS GENII, Trotter Controls, Inc DRAWINGS SH.12 & 13 ~ Instrument Installation Upper Panel (802F), Snow Engineering Co SH.1 ~ Instrument Installation Upper Panel (1002F), Snow Engineering Co ~ Assy Gatebox Electrical, Snow Engineering Co SH.10 ~ Control System Wiring Schematic (802F), Snow Engineering Co SH.21 ~ Control System Wiring Schematic (1002F), Snow Engineering Co SH.1 ~ Installation - Relay Box FRDS (1002F), Snow Engineering Co SH.2 ~ Installation - Relay Box FRDS (802F), Snow Engineering Co SH.1 ~ Installation - Multibox FRDS (1002F), Snow Engineering Co SH.2 ~ Installation - Multibox FRDS (802F), Snow Engineering Co SH.1 ~ Assy - Relay Box FRDS (802F & 1002F), Snow Engineering Co ~ Cable Assy. Valve to Multibox, Snow Engineering Co ~ Pilot Interface GEN II FRDS, Snow Engineering Co SH.4 ~ Float Installation Hopper (802F), Snow Engineering Co SH.4 ~ Assy - Gatebox Actuator, Snow Engineering Co SH.10 ~ Hydraulic Schematic (802F), Snow Engineering Co SH.21 ~ Hydraulic Schematic (1002F), Snow Engineering Co SH.13 & 14 ~ Hydraulic System Installation (802F), Snow Engineering Co SH.21 & 22 ~ Hydraulic System Installation (1002F), Snow Engineering Co SH.2 ~ Installation Hopper Fill Gauge (1002F), Snow Engineering Co SH.3 ~ Installation Hopper Fill Gauge (802F), Snow Engineering Co , SH.2 ~ Installation-Hydraulic Manifold-802, Snow Engineering Co ~ Fitting Assy, Hydraulic Tank, Snow Engineering Co SH.2 ~ Installation Gatebox Actuator (Sensor Assy) (1002F), Snow Engineering Co ~ Float Installation Hopper (1002F), Snow Engineering Co SH.1 ~ Hydraulic Manifold Assy Fire Gate (802F), Snow Engineering Co SH.21 ~ Hydraulic Manifold Assy Fire Gate (1002F), Snow Engineering Co ~ Assy, Hydraulic Pump, Snow Engineering Co ~ Filter Assy, Hydraulic System, Snow Engineering Co Page 5 of 56 Document# TROTTER CONTROLS, INC.

6 Revisions Revision C: 6/1/2009 Added revisions section to track changes made Updated AUTO/MAN cheat sheet photos Added additional drawings to include references included in TC document ER-0077 Added section for setting Power On preferences for AUTO / TIMER mode Revision D: 9/24/2009 Foam Injection: Pushing the selector knob (to exit) does NOT terminate the foam injection operation, but allows it to continue during the AUTO or TIMER display screen SYSTEST removed all wait for Save Memory to complete warnings, as this no longer applies Changed switch references of TEST LAMPS to LAMP TEST Changed switch references of Open Door to Open Gate Changed switch references of Close Door to Close Gate Rewrote section describing switch function for YES / NO / FOAM / MENU switches Added SALVO pushbutton switch test Revision E: 05/04/2010 Added note for Pilot Interface display change software version 2.02 and newer Updated system overview graphics to include foam function Added FRDS menu tree Added warning about Armed switch and Emergency dump lever Revision F: 06/16/2010 Removed ER-0093 and updated Table of Contents page Updated process specification PS-0035, GEN II FRDS Memory Management Updated data sheet DS-0003, IP67 Remote Vacuum Fluorescent Display Corrected Drawings reference list for 80493, & TROTTER CONTROLS, INC. Document# Page 6 of 56

7 Overview This document includes maintenance, troubleshooting, and other information in addition to items needed for basic operation of the system. A list of the reference documents used to support this manual is included at the end of the manual and in the table of contents. The reader is encouraged to refer to Trotter Controls Document# for condensed FRDS system operation instructions. Introduction The Fire Retardant Delivery System or FRDS enhances the capability of the aircraft to fight grass fires and forest fires by providing computer control over the release of fire retardant agent from the hopper. The FRDS allows the pilot to select the most effective concentration or coverage of agent over the ground, which varies with the type and size of fire. It also lets the pilot select the volume of agent released during a dump. This enables split load operations. A second generation FRDS or GEN II system is now available and is being installed in AT- 802/802A aircraft. The GEN II system is an advancement of the original GEN I FRDS and provides improved delivery accuracy, increased component reliability, and hydraulic system refinements. GEN II FRDS Features Based on over 15 years of field experience with the first generation FRDS system, Air Tractor has developed a completely new FRDS system designed from the ground up for reliability, performance, and maintainability. The focus of the GEN II FRDS ground up re-design was to eliminate failures due to vibration, humidity, and hydraulic system failures as well as the provide state of the art built in diagnostic features. Some of the enhancements over the first generation FRDS product are described below. Accurate and dependable coverage delivery Improved flow control and delivered gallonage accuracy Improved door speed New advanced leakage compensation algorithms delivers ACCURATE split load operation Highly reliable specific purpose control system Reliability FIRST Hardened against vibration and humidity Dual microprocessor (µp) and electro-mechanical backup automatic salvo systems o Redundant Automatic Salvo system ensures door opening Fully sealed digital side loader displays sealed to IP67 Page 7 of 56 Document# TROTTER CONTROLS, INC.

8 New non-contact hopper contents sensor New non-contact gatebox position sensor Water proof connectors with IP67 rating Pilot and Maintenance Friendly Black Box or cable change out/swap program Sunlight readable Liquid Crystal or Advanced Vacuum Fluorescent Text/Graphics Display Built in system status, diagnostics & messaging o Stuck valve detection o Bad switch detection o Broken wire detection o Open or missing valve coil detection o Bad sensor detection o Blown fuse detection o Voltage monitoring o Built in test / diagnostics feature Redundant Systems to Insure Door Opening Three independent systems are provided to ensure the doors open when expected. Hydraulic system refinements Hydraulic pump package Highly reliable o Dual head 93% efficient hydraulic pump o Lower electrical current requirements than GENI systems o Heavy duty DC motor o Inlet filter on pump eliminates contaminates o Tested for over 10,000 flight hours in a 160F controlled environment with no failure No servo valve three, low-cost, dirt tolerant directional valves are used. Three valves offer three levels of redundancy when opening doors Independent pressure switch (electro-mechanical system) and pressure sensor (µp system) are used to control the pump for added mission reliability Benefits System is highly reliable System is highly repeatable System offers three modes of operation System has three levels of redundancy on door opening command System is very easy to install and set up System is easy to operate Lower cost of ownership System is self diagnosing Black Box swap out Minimal training required for troubleshooting and maintenance TROTTER CONTROLS, INC. Document# Page 8 of 56

9 Constant Flow Rate versus Constant Gate Angle The flow rate of retardant from the hoppers has been shown to be proportional to the coverage level seen on the ground pattern. It follows that the primary goal of the retardant delivery system is to maintain a constant flow rate from the hoppers throughout the delivery. Constant angle and constant flow delivery operation are briefly discussed in the following sections. Trotter Controls Document# TP-1000 (included in the reference materials) provides details regarding the clear advantages of constant flow (coverage) retardant delivery as opposed to the less accurate constant gate angle delivery method used on less sophisticated systems. Constant Gate Angle Delivery Systems Some retardant delivery systems open the gatebox doors to a fixed angle throughout the delivery then close when a preset amount of time has elapsed. These systems allow split load operation and a coarse method of delivering the retardant at different flow rates. Constant gate angle systems are simple to design and construct since the only requirement is to open the door to a fixed angle for a given amount of Constant Gate Angle Constant Flow Control time. This method is inexpensive to engineer and produce but does not have the ability to accurately control the flow rate produced by the system 2.00 as the level of liquid retardant and acceleration forces on the aircraft 0.50 vary during the delivery process. Coverage Level (gals/100 SFT) Constant Gate Angle Vs. Constant Flow Control (Coverage Level 2.0) Ground Line (feet) Typically one timer is used to control how wide the doors open (a crude coverage control), and another timer is used to control how long the doors remain open (controls the amount of retardant delivered). Constant gate angle systems will produce a ground pattern that is too heavy at the onset of retardant delivery and is too light at the end of the delivery. These systems do not use retardant nearly as effectively as constant flow rate delivery systems. When the MODE switch is set to TIMER, the GEN II FRDS unit offers constant gate angle. The main advantage of this mode is that almost no sensors are using during TIMER mode operation thus allowing FRDS operation in the event of a hardware failure that prevents operation in AUTO mode. Constant Flow Rate Delivery Systems Constant flow rate delivery systems are more expensive to design and construct since the system must monitor various parameters during the retardant delivery and control the gatebox doors in a way to maintain constant flow rate. Page 9 of 56 Document# TROTTER CONTROLS, INC.

10 These systems control the position of the gatebox doors to effectively maintain constant flow rate during retardant delivery operations. Constant flow rate delivery systems will produce a superior ground pattern that is consistent throughout the delivery. These systems optimize the use of retardant during delivery operations and assure that the correct coverage level is maintained until just before the retardant tanks are empty. The GEN II FRDS unit operates in constant flow mode when the mode switch is in the AUTO position. Trotter Controls Document# TP-1000 shows that the constant gate angle system s (CGA) retardant utilization efficiency is only 65% as efficient as the more sophisticated constant flow rate delivery system for a 2.0 coverage delivery. At a coverage level of 0.5, the constant gate angle system is only 53.6% as efficient as the constant flow system. The bottom line is that the constant flow system will deliver longer ground line for a given amount of retardant delivered. CONSTANT FLOW = MAXIMUM GROUND LINE PER GALLON OF RETARDANT Utilization of constant flow rate delivery systems drastically improves the ability of a given aircraft and pilot to suppress fires due to the constant coverage delivered and longer ground lines that can be produced with a given amount of available retardant. System Description The GEN II FRDS is comprised of the basic primary elements: A hydraulic actuator to open and close the gatebox doors used to meter retardant flow rate. Hydraulic valves to control the flow of oil to and from the actuator. Sensors to sense various parameters needed by the control system. A relay enclosure to provide high power relays and drivers needed to operate the hydraulic valves and provide various voltages. This enclosure also houses a redundant electro-mechanical system. A pilot interface containing a graphic/text display, switches, accelerometers, and the primary microprocessor used to control the system. This is the primary interface for the pilot to control and interact with the system. The reader is encouraged to refer to Trotter Controls Document#TP-1002 for a detailed description of the system. The electrical schematic (Snow Engineering drawing 60441) and the hydraulic schematic (Snow Engineering Drawing 80504) provide specific details on the how the system is connected. The GEN II FRDS Operator s Manual (Trotter Controls Document # ) provides an abbreviated description and operation details from the pilot s perspective. An overview of the system is shown in Figure 1. TROTTER CONTROLS, INC. Document# Page 10 of 56

11 Figure 1 ~ GEN II FRDS overview. Page 11 of 56 Document# TROTTER CONTROLS, INC.

12 Modes of Operation There are several modes of operation for the GEN II FRDS. The operation mode is selected using the MODE switch on the pilot interface. There is a hydraulic power switch (HYD PWR) and a separate mode switch with three positions (AUTO, TIMER, MAN). The various operation modes for the system are listed below. Automatic Mode (AUTO) In this mode, the microprocessor controlled primary system automatically controls the flow rate and quantity delivered using various sensors and valves. Timer Mode (TIMER) In this mode, two timers and minimal sensors and valves are used to control the doors. One timer adjusts how long the doors move towards the open position (adjusts door angle) and a second timer adjusts how long the doors remain in a fixed position before closing. The doors are maintained in fixed position throughout the delivery. Manual Mode (MAN) In this mode, the backup manual system (separate from the primary AUTO system) opens and closes the gatebox doors using simple directional valves. The flow rate and quantity captured are not controlled. This mode is used to manually operate the gatebox doors and as a backup system for the AUTO system. The doors are opened to full open or full closed in this mode using directional control valves. The operation mode is selected using the MODE switch on the pilot interface. The various modes for the system are shown in Table 1. TROTTER CONTROLS, INC. Document# Page 12 of 56

13 Table 1 ~ FRDS Operation Modes during normal operation. Power Armed Mode System State / Mode Sw Sw Sw OFF X X Display Active, No pressure available to hydraulics, no pressure in system ON OFF X Display active, pressure available to hydraulics, no power available to valves to cause actuator motion, pressing fire switch has no effect ON ON AUTO Automatic control, power to hydraulics, depressing fire switch initiates delivery Constant flow rate Microprocessor Auto Salvo and Electro-mechanical Auto Salvo Active The gatebox door position is controlled in a way to maintain constant retardant flow rate during delivery Pump is controlled by the primary auto system and hydraulic pressure sensor ON ON TIMER Timer based control of doors, power to hydraulics, depressing fire switch initiates delivery Microprocessor Auto Salvo and Electro-Mechanical Auto Salvo Active Timer settings control the gatebox door position during delivery Pump is controlled by the primary auto system and hydraulic pressure sensor No sensors except pressure sensor required for operation The AUTO SALVO system uses the gate open sensors ON ON MAN Electro-mechanical control, power to hydraulics, depressing fire switch initiates delivery Pilot Interface Details Electro-Mechanical Auto Salvo Active Only Pressure Switch Controls Pump full open or full close only Gatebox door position is not automatically controlled by the system during delivery Pump is controlled by a pressure switch and relay. Pump operation cannot be disabled by the system in the event of an error in this mode. The AUTO SALVO systems are not active = NO REDUNDANCY The pilot interface is comprised of graphics / text display and various switches used by the pilot or maintenance crew to control system operation. Page 13 of 56 Document# TROTTER CONTROLS, INC.

14 Foam Gallons Display The pilot interface displays the current gallons left in the foam reservoir. The gallons displayed can range from 3 to 18 gallons. Due to the mechanical limitations of the foam tank sensor, 3 gallons is the minimum that can be displayed. Auto Mode Operation The functionality of the switches when the system is in AUTO or TIMER mode is summarized below. Switch Functions in AUTO/TIMER Mode Table 2 ~ Pilot interface switch functions when in AUTO/Timer mode. Parameter Device Action Comments Type Mode Switch Auto, Timer, Man Switch Set Mode to AUTO Changes the operation mode. When set to AUTO, primary microprocessor has control. Hyd Power Switch Turns on hydraulic power Fire switch Switch 1 NO, 1 NC Open the doors when pressed (if armed), Close doors when released Energize EDUMP valves, BLEED valve, pressurizes hydraulic system Located on flight stick Armed Sw Switch Arms hydraulic system directional valves (hardware), turn armed lamp on if real time diagnostics is OK Display Armed & Ready on Status, Light LED if all is ready Open Gate Sw Switch Open the doors at 1/8 speed, opening door Close Gate Sw Switch Close the doors at 1/8 speed, closing door Run Pump Sw Switch Turn on pump output, running pump Lamp Test Sw Switch Test all lamps that can be tested (see LAMP TEST switch on page 20) Menu / No Sw Switch Used to enter the MENU system Open doors manually using the primary AUTO system Close doors manually using the primary AUTO system Run the pump using the primary AUTO system. Clears any detected pump errors. This switch will not function if the I2C serial diagnostics bus is not active. Used for menu selection of items in the maintenance and configuration menus TROTTER CONTROLS, INC. Document# Page 14 of 56

15 Parameter Device Type Action Foam / Yes Sw Switch Used to inject foam with the optional foam injection pump Coverage Level (Delivery Parameter) Gals to Dump (Delivery Parameter) GENII Data Wheel GENII Data Wheel The coverage level in gallons per 100 square feet Pilot, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, ALL Comments Pressing Foam from the main AUTO or TIMER menu displays the FOAM INJECTION screen. AUTO MODE: Set the retardant flow rate desired TIMER MODE: Set time for doors to move towards open AUTO MODE: Set the number of gallons to dump TIMER MODE: Set time for doors to remain open Dual Armed Light Functionality (AUTO/TIMER Modes) On GENII systems, two ARM indicator lights are provided. One ARM light indicates that the microprocessor controlled AUTO system is armed while the second ARM light indicates that the back-up electro-mechanical system is armed. Both ARM lights on indicates that both the primary and backup manual system are armed and ready. GENII systems take any errors detected into account before turning the AUTO armed LED on. The possible states of the GENII armed indicators and their meanings are shown in the table below. NOTE While performing a dump in AUTO mode: Software version 2.01 and prior: -Pilot Interface displays DUMPING while doors are open and GATE CLOSED once complete. Software version 2.02 and newer: -Pilot Interface display does not change; ARMED indicator blinks rapidly until dump operation is complete. Remote ARMED indicator does not blink. Page 15 of 56 Document# TROTTER CONTROLS, INC.

16 Table 3 ~ GENII Dual Armed Indicator Meaning (AUTO/TIMER modes) MAN ARMED LED AUTO ARMED LED Indicated ARMED Status ON ON FULL REDUNDANCY: The backup manual system is armed and the primary AUTO system is armed. No errors are detected for the AUTO system. ON ON FLASHING REDUCED REDUNDANCY: The backup manual system is armed and the primary AUTO system is armed. Errors are detected for the AUTO system. The auto system may have reduced accuracy or reduced redundancy. See status message at the bottom of the alpha-numeric display. OFF ON NO REDUNDANCY: The backup manual system is not armed and the primary AUTO system is armed. This condition cannot exist unless there is a hardware problem with the manual system. OFF ON FLASHING NO REDUNDANCY: The backup manual system is not armed and the primary AUTO system is armed but has detected errors. This condition cannot exist unless there is a hardware problem with the manual system. The AUTO system should operate properly. However, there is no redundancy should the AUTO system fail. ON OFF NO REDUNDANCY: The backup manual system is armed. The primary AUTO system is not armed. This condition normally exists when the Pilot Interface MODE switch is set to MAN. The AUTO system may or may not operate properly. The system has reduced or no redundancy. Dimly glowing OFF or ON On systems with a remote armed light, this indicates that the remote light is disconnected or the bulb is burned out. On systems without a remote armed light, the terminator plug is not connected. The pilot interface and its functionality when operated in AUTO mode are shown in Figure 2. TROTTER CONTROLS, INC. Document# Page 16 of 56

17 Figure 2 ~ Pilot Interface function when operated in AUTO mode (main AUTO menu shown). Page 17 of 56 Document# TROTTER CONTROLS, INC.

18 Timer Mode Operation GENII systems also have a timer mode that allows operation of the system using minimal sensors and valves. This mode is provided to allow operation in the event of a sensor or other hardware failure that would prevent the AUTO mode from functioning properly. Trial and error adjustments of the timer settings are required to provide the desired operation of the gatebox doors. Note that timer mode provides constant door angle control similar to less capable systems available on the market. Timer mode is not recommended as the default operation mode since the quality of the ground pattern and retardant usage is not as desirable as the pattern produced by the system when operated in AUTO mode. Timer mode operation is summarized below: To enter Timer Mode, set the MODE switch on the GENII pilot interface to TIMER. Use the selector knob to adjust the timer value in the COVERAGE window to control how long the doors will slew towards the open position before stopping. This adjustment controls the fixed gate angle used. Larger timer settings will result in a larger fixed door opening. Use the selector knob to adjust the timer value in the GALS TO DUMP window to control how long the doors remain open before closing. This adjustment controls how much retardant is delivered. If PILOT is selected for this value, the doors will close as soon as the FIRE button is released during a delivery. System drops and operation are identical for AUTO and TIMER (GENII only) mode except that the retardant flow rate is not actively controlled in TIMER mode since the doors open to a fixed angle and remain at this angle until they are closed. The functionality of the pilot interfaces and switches when the system is operated in TIMER mode are summarized in Figure 3 on the next page. TROTTER CONTROLS, INC. Document# Page 18 of 56

19 Figure 3 ~ Pilot Interface Functionality when operated in TIMER mode (main timer menu shown). Page 19 of 56 Document# TROTTER CONTROLS, INC.

20 Special Uses of Panel Switches (AUTO/TIMER MODES) The panel switches are, for the most part, self-explanatory, and are described in detail in the AUTO MODE and TIMER MODE operation sections. However, some of the panel switches have special uses described below. LAMP TEST switch This switch tests the built-in panel indicator LED s, with the EXCEPTION of the LED s labeled GATE CLOSED (two LED s), MAN SALVO, and the left MAN ARMED LED. These LED s are always controlled by hardware and do not respond to the software controlled LAMP TEST function. The remaining LED s will respond to the LAMP TEST switch in normal operation. Failure of the LAMP TEST could indicate a failure of the I2C communications buss within the pilot interface and between the pilot interface and relay box. NO switch While in most menus and sub-menus, the NO switch can be used to immediately exit the menu system and return to the main system display. During system startup, holding the NO switch down will start the system with FACTORY VALUES after a warning message is displayed. Note that the system will not operate properly using the factory default leakage and analog calibration values. This option is provided as an intermediate step required to recover specific calibration data for your aircraft in the event of a memory problem. While either an AUTO dump or TIMER dump is in progress, pressing the NO switch will ABORT the dump and immediately close the gate doors. RUN PUMP switch Depressing this switch momentarily, will clear ANY active errors except for errors 021 and 105 reported by the system diagnostics performed by the pilot (SysTest, See System Tests on page 26), including errors that may have shut down the hydraulic pump. Note that even though all errors are cleared, the fact that these errors have occurred are still indicated in both the Error History table and the Error Counts table. Pressing the Run Pump switch clears all current errors except for error 021 and 105. Current hardware errors will return once they are detected again by the system. Errors 021 and 105 detected during SysTest will persist even if power is removed from the unit until the appropriate SysTest has been successfully performed to clear the error(s) (See System Tests on page 26). Special Modes of Operation (AUTO/TIMER) Fuel Ferry Mode This special mode of operation allows the airplane to be flown with the gate actuator hydraulically locked in the closed position to ferry fuel in the hopper for long non-stop over-water flights. It can also be used to ferry water or retardant to distant fires with the hydraulic pump remaining off to preserve battery power, and insure that the gate doors are in a fail-safe mode and will not open. In this mode, although the system is hydraulically locked, the hydraulic pump will remain off to preserve battery power, and hydraulic pressure will NOT be maintained. TROTTER CONTROLS, INC. Document# Page 20 of 56

21 To enter this mode, perform the following steps: From the main AUTO or TIMER display press the NO/MENU switch. The menu shown to the right should be displayed. Use the selector knob to highlight FUEL FERRY Press the selector knob to enter FUEL FERRY mode Turn the ARMED switch to the OFF position Turn the HYD POWER switch to the ON position o The gate doors are now hydraulically locked and pump operation is disabled. This mode can be exited ONLY by switching HYD POWER OFF TO EXIT. o No other switches or controls are operational to eliminate accidental exit from this mode. The HYD POWER switch is a safety-locking switch and must be pulled out to unlock it before it can be switched to the OFF position. NOTE: The MAN SALVO button is active in this mode. Depressing the MAN SALVO button regardless of ARMED or POWER switch setting will cause the pump to operate and the gatebox doors to open slowly. Pilot Interface Mirror mode A special mode has been incorporated to allow the same graphics and text displayed to the pilot to be displayed or mirrored on the remote side loader gauges as well as any remote gages present in the cockpit. This feature allows a remote display to be mounted in the rear cockpit for pilot training purposes (or a more visible location in the front cockpit) and is useful during maintenance of the system. Mirror mode allows any remote display connected to the system (such as the remote hopper gauges) to be used to display identical information as on the Pilot Interface display. For example, you could monitor operation from just about anywhere as seen in the photo below. The remote side loader gages display the same information as any remote displays located in the cockpit. Be sure to set the MODE switch to MANUAL when loading the system with retardant so that the side loaders display hopper gallons to ground personnel. Enabling/Disabling Mirror Mode To enable mirror mode functionality, set the value of system parameter (tweak) 94 to the value of 255 (the default factory value). To disable mirror mode functionality, set the value of system parameter (tweak) 94 to the value of 0. Refer to Trotter Controls Engineering Report 0074 for details on how to edit system operation parameters. Page 21 of 56 Document# TROTTER CONTROLS, INC.

22 Activating Mirror Mode If the mirror mode system parameter has been enabled using system parameter 94 (the default), and the MODE switch is in either AUTO or TIMER mode, mirror mode is activated. In this mode, the hopper gauge (which normally shows gallons in hopper) will mirror the same information as displayed on the main Pilot Interface display when the system is in AUTO or TIMER mode. When the mode switch is set to MANUAL mode, the hopper contents are displayed on the remote displays present in the cockpit and on the side loaders. De-activating Mirror Mode Placing the MODE switch in the MAN position will return the hopper gauge to its normal function. Any remote displays (cockpit or side loader) will display the gallons of retardant present in the hopper. Brightness Adjust mode When the main display is visible in AUTO or TIMER mode, Pressing and holding the selector knob will enter Brightness Adjust mode. Brightness values may range from 1 (dimmest) through 8 (brightest). Setting a value of zero will allow the brightness to auto-adjust based on ambient light at the Pilot Interface. On VFD units, the brightness setting controls both the display of the Pilot Interface (and any mirrored VFD displays) as well as the brightness of any dimmable display lamps/led s on the Pilot Interface. On LCD units, the backlight brightness changes as well as the brightness of any dimmable display lamps/led s on the Pilot Interface. Foam Injection This feature (if installed) allows the operator to inject foam from the foam dispenser into the main retardant hopper. This feature is selected by pressing FOAM/YES from the main AUTO or TIMER screen. Press the "FOAM/YES" from the main AUTO or TIMER screen. Turn "Hyd Power" switch on. o Note that the Hydraulic Pump will not operate in this mode. Use the twist knob to select the number of seconds (from 0 to 120) to run the injection pump. Press "YES" to start the injection pump for the specified amount of time. The timer value can be changed at any time, or the "NO" switch can be used to turn off the injection pump. o A countdown timer at the bottom of the screen shows the number of seconds remaining for the injection cycle, while the number displayed at the lower right indicates the gallons remaining in the foam tank. Pushing the selector knob exits FOAM INJECTION mode and displays the main AUTO or TIMER screen. The injection pump will continue operation until the selected duration expires. When FOAM INJECTION mode is exited, the Hydraulic Pump will again be enabled. TROTTER CONTROLS, INC. Document# Page 22 of 56

23 Manual Mode Operation The operations of the various switches on the panel are summarized in the table below. Table 4 ~ Switch functionality in manual mode. Parameter Device Type Action Comments Mode Switch (MAN) Auto, Timer, EM Switch Set Mode to MAN When the switch is set to MAN, the electro-mechanical relay/timer system has control. NO REDUNDANCY IN MAN MODE. Hyd Power Switch Turns on hydraulic power Energize EDUMP valves, BLEED valve, pressurize hydraulic system Fire switch Switch 1NO, 1NC Open the doors when pressed, Close doors when released Armed Sw Switch Arms hydraulic system directional valves (hardware), turn armed lamp on if real time diagnostics OK Open Gate Sw Switch Close Gate Sw Switch Run Pump Sw Switch Located on flight stick AUTO armed is not active when in MAN mode (NO REDUNDANCY IN MAN MODE) Open the doors at 1/8 speed, Open doors manually using the secondary electro-mechanical system Close the doors at 1/8 speed, Close doors manually using the secondary electro-mechanical system Active switch to manually turn on the pump Run the pump using the secondary electro-mechanical system Note that the system hardware is not able to turn the pump off when in manual (MAN) mode in the event of a detected pump error. The pilot should monitor the RUN PUMP LED and make sure the system has sufficient oil before using manual mode since the automatic pump error detection used to detect errors is not active when operated in MAN mode. Salvo System Activation GENII FRDS systems incorporate an automatic salvo backup system. The function of this subsystem is to open the doors in the event that the primary (AUTO) system is unable to open the doors due to a hardware or software error. GENII systems provide two independent automatic salvo systems (one system is controlled by an independent supervisor microprocessor (AUTO SALVO) while relays and hardware timers only (MAN SALVO) control the second system). The two independent automatic salvo systems are only active in AUTO or TIMER modes of operation. The function of these systems is to monitor whether or not the primary AUTO/TIMER system opened the gatebox doors as expected when the system is armed and the FIRE button is depressed. Page 23 of 56 Document# TROTTER CONTROLS, INC.

24 Automatic Salvo Activation If the doors do not open as expected in AUTO or TIMER mode when the system is ARMED, hydraulic power is present, and the FIRE button is depressed, the system will perform the following actions: Open the gatebox doors using a directional valve o The AUTO SALVO microprocessor system uses valve 2 on the hydraulic manifold o The MAN SALVO electro-mechanical system uses valve 3 on the hydraulic manifold Run the pump for a specified time interval Illuminate the AUTO SALVO or MAN SALVO LED to indicate which of the two independent auto salvo systems has been activated. o Note that normally the AUTO SALVO system is activated first. o The MAN SALVO system is activated only if the AUTO SALVO system was unable to open the doors for some reason within the specified amount of time. See the sections below for more information regarding the AUTO SALVO and MAN SALVO system operation. Pilot Activated Salvo The manual salvo system can be activated using the red MAN SALVO button regardless of the pilot interface switch settings. On GENII systems, this button is located adjacent to the power quadrant on the L/H side of the cockpit. o This RED button overrides the power, mode, and arm switches to open the gatebox doors. If no hydraulic pressure is present in the system (system power is off), the doors will open slowly as the pump delivers flow to open them. o To open the doors using the MAN SALVO button, depress the red SALVO button. This will run the pump, open the doors and then leave the doors in the open state after a timeout period. The pump will run until the system pressure reaches 3000 PSI and then it will turn off automatically. o This latching button disables auto and manual operation when activated (depressed). Caution: Never press this button unless you intend for the gatebox doors to open and you have verified that all personnel are clear of the gatebox doors. Always deactivate the MAN SALVO button to resume normal system operation. The button should be in the extended position for normal operation. Always turn the Arm switch off prior to moving the Emergency dump lever back to its normal position to prevent inadvertent Auto or Manual Salvo. Auto Supervisor Activated Salvo No pilot action is required for this event to occur. The microprocessor controlled AUTO SALVO system monitors the doors to make sure they open when expected. If the doors do not open TROTTER CONTROLS, INC. Document# Page 24 of 56

25 within 0.8 seconds after the fire switch has been pressed, this system will take over, isolate the primary system and attempt to open the gatebox doors. Pre-conditions: MODE=AUTO or TIMER, HYD PWR=ON, ARMED=ON Activation Condition: If FIRE button is depressed and the gatebox doors do not open within 0.8 seconds, an AUTO SALVO condition is triggered. o If the AUTO SALVO system has been activated, this means that primary system (AUTO or TIMER mode) failed to open the doors. The AUTO SALVO LED will be illuminated when this system is activated. Valve 2 (middle directional valve) on the hydraulic manifold is used to open the doors. The pump is operated for 20 seconds, then is turned off. The gatebox doors will remain open until the salvo condition is cleared. MAN System Activated Salvo No pilot action is required for this event to occur. The electro-mechanical MAN SALVO system monitors the doors to make sure they open when expected. If the doors do not open within 1.2 seconds after the FIRE switch has been pressed (this is 0.4 seconds after the AUTO SALVO system would have tried to open the doors), this system will take over, isolate the primary and secondary systems and attempt to open the gatebox doors. Pre-conditions: MODE=AUTO or TIMER, HYD PWR=ON, ARMED=ON Activation Condition: If FIRE button is depressed and the gatebox doors do not open within 1.2 seconds, a MAN SALVO condition is triggered. This MAN SALVO system is activated 0.4 seconds after the AUTO supervisor is activated. o If the MAN SALVO system has been activated, this means that the AUTO SALVO system failed to open the doors. The MAN SALVO LED will be illuminated when this system is activated. Valve 2 (middle directional valve) on the hydraulic manifold is used to open the doors. The pump operates until a pressure of 3000 PSI is reached and runs as required to maintain hydraulic pressure. It s operation is controlled via a relay and a pressure switch. The doors will remain open until the salvo condition is cleared. Recovery from an Automatic Salvo Condition To reset the system after a AUTO or MAN SALVO event, the error must be cleared. To clear the error on GENII systems perform the following actions: Turn the ARM switch to the OFF position. Turn the HYD POWER switch to the OFF position. The condition should be cleared and the MAN SALVO button should not be illuminated. Turn the HYD POWER switch to the ON position and operate the system as required. If MAN SALVO is still displayed after performing the steps above, check the following: Verify that all breakers are pushed in are not tripped. Verify that the MAN SALVO red button is not pressed in. Verify that the relay enclosure is connected properly and receiving power as expected. MAN SALVO is displayed any time the relay enclosure is not receiving power as expected and the pilot interface is active. Page 25 of 56 Document# TROTTER CONTROLS, INC.

26 System Tests The FRDS system passively monitors many parameters any time the HYD POWER switch is set to the ON position and the mode is set to AUTO or TIMER. However, some items are only tested when the pilot initiates a SysTest menu item, since outputs and valves must be activated to fully test the system. The self-test feature incorporated in the unit is able to detect the following problems: Stuck valves Incorrectly wired valves (in most cases) Burned out wires Burned out coils Problems with the pump or accumulator Faulty or improperly adjusted sensors Improper manifold orifice installation Damaged or non-operational pilot interface switches Other errors We recommend that the tests shown in Table 5 be performed by the pilot on a regular basis to ensure that the system is operating as expected: Table 5 ~ Recommended Pilot Initiated System Test Schedule. System Test Type Recommended Comments Test Interval Pilot (no doors) Daily Test can be performed with hoppers fully loaded Pilot (ALL) Weekly Hoppers must be empty for this test Auto Salvo Weekly Hoppers must be empty for this test Man Salvo Weekly Hoppers must be empty for this test Maint SysTest As required Hoppers must be empty for this test System Self Diagnostic Tests SysTest Menu To enter the SysTest menu, perform the following steps: From the main AUTO or TIMER menu press the NO/MENU switch. The menu shown below should be displayed. Use the selector wheel to highlight SysTest Press the selector wheel to enter SysTest mode Use the selector wheel to select the test to be performed Follow instructions on the screen NOTE: The red MAN SALVO button is active in this mode. Depressing the MAN SALVO button will cause the pump to operate and the doors to open slowly. TROTTER CONTROLS, INC. Document# Page 26 of 56

27 The SysTest submenu contains the following five menu items: Pilot (no doors) Testing with no gatebox door movement allowed Pilot (ALL) Comprehensive tests with gatebox door movement allowed Auto Salvo Test the microprocessor-controlled AUTO SALVO system Man Salvo Test the electro-mechanical MAN SALVO system Maint SysTest Same as Pilot(ALL) with PASS/FAIL and diagnostic information displayed Note that it is necessary to scroll the menu using the data wheel to display all of the items shown above, since only four items can be displayed at one time on the four line display. The individual submenu items are fully described in the following sections. Pilot (no doors) System Test This submenu item allows the pilot to quickly test system components that DO NOT result in the gate doors being operated. This set of tests is useful when there are contents in the hopper that should not be released. The total time of this set of tests requires about 45 seconds. The tests are performed without the need for operator intervention unless any of the tests fail, in which case an error indicator remains on the screen until cleared by the pilot. The set of tests that are performed are: Switch Test (optional) Pilot must cycle all switches during this test, then press the data wheel in once all illuminated blocks indicating the switch positions are not illuminated to continue to the next test (See Trotter Controls Document# TS-0005 for more information on the switch test) Valve Mon1 Mon2 Test Confirm valves connected OK, and wiring is OK. Hyd Pump pressure limit test Bleed / Edump Pass Fail test Pilot (ALL) System Test CAUTION: The gatebox doors are operated during this test. Verify that all ground personnel are clear before selecting this test. This submenu item allows the pilot to test ALL system components quickly, including those that result in the gate doors being opened. This set of tests is useful when the hopper is empty. The total time of this set of tests requires about 2 minutes. The tests performed are almost identical to the comprehensive maintenance system tests described below except that no status is displayed to the pilot unless a failure is detected. Trotter Controls Document# TS-0005 has a detailed description of the items that are tested. The tests are performed without the need for operator intervention unless any of the tests fail, in which case an error indicator remains on the screen until cleared by the pilot. The set of tests that are performed are: Page 27 of 56 Document# TROTTER CONTROLS, INC.

28 Switch Test (optional) Pilot must cycle all switches during this test, then press the data wheel in once all illuminated blocks indicating the switch positions are not illuminated to continue to the next test (See Trotter Controls Document# TS-0005 for more information on the switch test) Valve Mon1 Mon2 Test Confirm valves connected OK, and wiring is OK. Valve Wiring Test Confirm valves function as expected and are connected properly. Gate prox switch test Verify that the door home sensors function properly. Hyd Pump pressure limit test Verify that the hydraulic pump and sensor are OK. Bleed / Edump Pass Fail test Verify that the bleed and EDUMP valves function properly. Gate Angle voltage Test Verify that the gatebox angle sensor functions properly. Auto Salvo System Test CAUTION: The gatebox doors are operated during this test. Verify that all ground personnel are clear before selecting this test. This submenu item allows the pilot to test the primary microprocessor controlled automatic salvo system (Auto Salvo) for ensuring that a dump occurs when the pilot requests one. This test should be performed only when the hopper is empty. After starting this test, the operator is instructed to press the DUMP (fire) switch. The primary system will inhibit dumping and the redundant system should then initiate an AUTO SALVO. The display should read AUTO SALVO (in large text). Turn the ARMED switch off to terminate this test after a salvo has occurred. Man Salvo System Test CAUTION: The gatebox doors are operated during this test. Verify that all ground personnel are clear before selecting this test. This submenu item allows the pilot to test the secondary electro-mechanical automatic salvo system (Man Salvo) for ensuring that a dump occurs when the pilot requests one. This test should be performed only when the hopper is empty. After starting this test, the operator is instructed to press the DUMP (fire) switch. The primary system and first redundant system will inhibit dumping and the second redundant system should then initiate a MAN SALVO. The display should read MAN SALVO (in large text). Turn the ARMED switch off to terminate this test after a salvo has occurred. Maint SysTest Maintenance Personnel System Test CAUTION: The gatebox doors are operated during this test. Verify that all ground personnel are clear before selecting this test. This submenu item allows maintenance personnel to test any or all system components. Unlike the Pilot(no doors) and Pilot(ALL) tests, these tests require the operator to acknowledge the result of each test, whether the test passes or fails. The operator may choose which tests to perform and which tests to skip. The set of tests that may be performed are: TROTTER CONTROLS, INC. Document# Page 28 of 56

29 Switch Test Pilot must cycle all switches during this test, then press the data wheel in once all illuminated blocks indicating the switch positions are not illuminated to continue to the next test (See Trotter Controls Document# TS-0005 for more information on the switch test) Valve Mon1 Mon2 Test Valve Wiring Test Gate prox switch test Hyd Pump pressure limit test Bleed / Edump Pass Fail test Hyd Pump rate & Bleed/eDump Test Continuous Hyd System Flush Gate Angle voltage Test All of the tests performed in any of the SysTest menu choices are described in detail in a separate document, Trotter Controls Document# TS Salvo Button Test CAUTION: The gatebox doors are operated during this test. Verify that all ground personnel are clear before selecting this test. This switch acts independently from all switches on the pilot interface. On GENII systems, this red button is located adjacent to the power quadrant on the L/H side of the cockpit. Pressing the Salvo Button results in the following action regardless of the Pilot Interface switch settings: The hydraulic pump runs until 3000 PSI is reached The doors are opened MAN SALVO is displayed on the pilot interface. To reset the MAN SALVO condition in MAN Mode: o Depress and release the MAN SALVO switch o Set the ARMED switch to the OFF position. o Turn hydraulic power OFF o Turn hydraulic power ON to resume normal operation. NOTES: If the system is in MAN mode, not ARMED and HYD power OFF, depressing the SALVO switch will reset the MAN salvo condition To reset the MAN SALVO condition in AUTO or TIMER Mode: o Depress and release the MAN SALVO switch o Set the ARMED switch to the OFF position. o Resume normal operation. NOTES: If the system is in AUTO or TIMER mode and not ARMED, depressing the SALVO SWITCH will reset the MAN salvo condition. The Salvo Button should be tested for all possible combinations of the ARM switch, Mode Switch, and Hydraulic Power switch. Page 29 of 56 Document# TROTTER CONTROLS, INC.

30 System Test Persistent Errors The FRDS computer saves the results of the system tests to EEPROM so that an error is indicated any time the system has failed to pass SysTest as expected. This feature has been added to alert the pilot that the system previously failed during the pilot initiated system test (SysTest) of the controls and hydraulics hardware. These errors can only be reset by successfully performing the system tests for the system hardware. Two error conditions can be detected and will persist even if power is removed from the system until the hardware is able to pass the system tests. "021_Panel Switch Err" - The switch test failed or was aborted by the pilot during the current or previous SysTest. "105_Systest Err" - Some hardware item failed during the current or previous SysTest. Error number 021 indicates that either a panel switch error had occurred during SysTest, or that the operator had aborted the panel switch test without successfully completing the test by testing all possible switch positions. Error number 105 indicates that some error had occurred during a previous run of SysTest, and a successful run of SysTest had not been completed since the error occurred. Clearing Persistent SysTest Errors While the RUN PUMP switch and the "Clear Errors" menu item of the Maint menu can be used to clear all errors, these will NOT clear the persistent errors 021 and 105. These errors can only be cleared by successfully running a SysTest procedure. To clear error 021_Panel Switch Err, perform either PILOT (no doors), PILOT (ALL), or Maint SysTest. o o o Make sure to cycle all switches during the switch test per Trotter Controls Document# TS Do not press the data wheel to exit the switch test until all of the switches have been properly cycled and the illuminated block indicators for each switch position have gone out as each switch is actuated. The error is automatically cleared once the switch test has been properly performed with no detected failures. To clear error "105_Systest Err, perform the PILOT (ALL) system test. o o o o Perform the PILOT (ALL) system tests per Trotter Controls Document# TS Do not exit the test or abort during the test sequence. The error is automatically cleared once the SysTest has been performed and the hardware is verified to operate properly. Note that performing a Maint SysTest or a Pilot (no doors) SysTest WILL NOT clear error 105. A successful PILOT (ALL) test is the only way to clear this error. Maint SysTest can be utilized to diagnose the cause of the system failure but will not clear the persistent error. TROTTER CONTROLS, INC. Document# Page 30 of 56

31 Menu System The menu system is a multi-level set of menus that you enter by pressing the NO/MENU switch from the main AUTO or TIMER screen. Rotate the selector knob to the desired option and press the selector knob to select that option. To exit any menu, press the NO switch, which results in returning to the main AUTO or TIMER screen. Some menus have an EXIT option which will return to the previous (higher level) menu. Please note, screens may differ slightly on LCD type Pilot Interfaces. Main Menu The Main menu contains the following menu items: Maint Maintenance Functions Config Set the aircraft configuration SysTest Perform hardware diagnostics Fuel Ferry Special mode for ferry operations ErrorHistory Display of logged errors Exit Exits the current screen Maint Menu This menu item opens a Maintenance submenu that contains the following menu items: Tweak Parameters Adjust system operation parameters - See Trotter Controls Document ER-0074 for details. Digital Inputs View the various inputs from switches and sensors in the system Digital Input Map View a map of all inputs simultaneously Digital Outputs View and/or force selected outputs Digital Output Map View a map of all outputs simultaneously Analog Inputs View the various voltages from sensors monitored by the system Analog Calibrate Calibrate the system A/D converters (factory use only) Err Msg Index/Counts Show a listing of all errors that can occur Clear Errors Clear active errors but don t clear the count of errors that have occurred Clear Err Counts Clear the counts for the number of times a given error has occurred. This clears the counts for all error counters. Clear ErrHistory Clear the error history buffer System Reset Restart/Re-boot the primary microprocessor Save Memory Save memory to the internal and/or external data memory Read EEprom Read the leakage data and other information from the external memory Compare RAM/EE Display the differences in active parameters and the EEPROM memory Logo/Version Display the Air Tractor Logo and software version installed Leakage Table Display the tank leakage calibration factors Exit Exit the menu Page 31 of 56 Document# TROTTER CONTROLS, INC.

32 Config Menu This menu item opens a Configuration submenu that contains the following menu items: Aircraft Select the aircraft type and hardware configuration Learn Set learning mode for dump pit calibration. Refer to PS-0032 H/Ware Future Use - Hardware configuration options. Exit Exit the menu SysTest Menu This menu item opens a SysTest submenu. This menu selection is used to select the various diagnostics self tests that can be performed by the system. The system test features are described in System Test section of this document. Error History From the Main menu, select Error History. This display shows any errors that have occurred in chronological order. Errors displayed include those encountered during the current run, as well as those that have occurred during previous runs of the system. A system reset entry (code 001) separates the current run errors from those of previous runs. The most recent error is at position number 1 of the error history table, with the oldest error at position number 50. The position of the entry at the beginning of the current run is indicated by (1 st boot entry). Errors at positions lower than this entry (through position number 1) have occurred during the current run of the system. Errors at positions higher than this entry (through position number 50) have occurred during prior runs of the system. Digital Inputs This menu option allows maintenance personnel to view the values of various digital inputs to the system. Each input is listed with its hardware pin designator and preceded with its current value, either ON (in highlighted text) or OFF (in normal text). The sequence number of the input is displayed in highlighted text. The sequence number ranges from 0 to 81 and is associated with the Digital Input Map display (described next). Panel switches appear at the beginning of the digital input display to facilitate easy testing. Note: Digital Inputs mode is the ONLY mode (other than Pilot Assisted Test SysTest) in which an AUTO dump is INHIBITED. In all other modes, if the system is ARMED and Hyd Power is on and the Fire switch is pressed, an auto dump will be performed. Digital Inputs mode will inhibit an auto dump if the MODE switch is in either the AUTO or the TIMER position. Note that simply inhibiting an auto dump will NOT prevent a dump from happening; because if an auto dump DOES NOT occur, one of two backup systems (AUTO SALVO or MAN SALVO) will take control and open the gate doors. TROTTER CONTROLS, INC. Document# Page 32 of 56

33 Digital Input Map This menu option allows maintenance personnel to view the values of all digital inputs to the system on a single screen. Since there are 21 characters per line and 4 lines per screen, up to 84 inputs may be viewed at once. Digital inputs are numbered from 0 to 83, and are listed sequentially on the display with 0 to 20 on the top line, 21 to 41 on the second line, 42 to 62 on the third line, and 63 to 83 on the bottom line. To facilitate ease of reading the display, a digit (0,1,2,3,4,5,6,7,8) is displayed every 10 positions to indicate positions 0,10,20,30,40,50,60,70, and 80. A slash mark / is displayed every 5 positions at position 5,15,25,35, etc. Positions that correspond to an input value of ON will contain a block character. Positions that correspond to an input value of OFF will NOT contain a block character. The sample display below shows all inputs OFF except for inputs numbered 1, 10, 13, 15, 31, 33, 77, 79, 80, and 81. To facilitate easier reading of the display when many ON states (block characters) exist, when a block character is present at a position that is a multiple of five (0,5,10,15,20,etc.), a narrow block character is used instead of the full-sized block character. Note that the first 11 digital input values (positions 0 to 10) represent the current state of the Pilot Interface panel switches, as viewed from left to right. A complete list of the digital input numbers can be viewed in the Digital Inputs display. Digital Outputs This menu option allows maintenance personnel to view and optionally change the values of various digital outputs in the system. Each output is listed with its hardware pin designator and with its value, either ON or OFF, along with whether the output is forced on or off. To force an output either ON or OFF, perform the following: Use the data wheel to scroll the output to be controlled to the top of the screen. Use the YES switch to turn the output on or use the NO switch to turn the output off. o Note that HYD PWR and the ARMED switch must be on for some outputs to function due to the hardware design Pressing the data wheel in exits this screen If an output is forced, an asterisk * is displayed. The sequence number of the output is displayed in highlighted text. The sequence number ranges from 0 to 23 and is associated with the Digital Output Map display (described next). Panel LED indicators appear at the beginning of the digital outputs to facilitate easy testing. To exit this mode, press the selector knob, at which time all forces will be removed and all outputs will be reset to the state they were in when this mode was entered. Note: Setting tweak number 91 to the special value of 99 will cause Digital Outputs mode to KEEP any forces set by the user and NOT restore them upon exit from this mode. This may be useful for maintenance personnel to force a digital output and then view the resulting change of a digital input (in Digital Inputs mode, described earlier). Page 33 of 56 Document# TROTTER CONTROLS, INC.

34 Digital Output Map This menu option allows maintenance personnel to view the values of all digital outputs of the system on a single screen. Digital outputs are numbered from 0 to 24. The format of the screen is the same as Digital Input Map (described above), except there are fewer outputs to display, so fewer lines are used on the display. Unlike Digital Outputs mode, this mode can only be used to DISPLAY the state of digital outputs, not force them on or off. The sample display above shows all outputs OFF except for outputs numbered 1, 2, 6, 7, 8, and 9. The first 5 digital output values (positions 0 to 4) represent the current state of the LED lamps on the Pilot Interface panel. A complete list of the digital output numbers can be viewed in the Digital Outputs display. Analog Inputs This menu option allows maintenance personnel to view the values of various analog (voltage) inputs to the system. Each input is listed with its hardware pin designator and listed with its analog count value, both an unfiltered count (marked as ct ) and a filtered (averaged) count (marked as av ). An analog voltage is displayed along with a conversion to units-of-measure for some analog values. Pressing the YES switch will freeze (data hold) the numeric portion of the display ( HOLD is indicated in the upper right of the display) and the bar graph, if displayed, will then be more responsive (for viewing accelerometer response). Pressing the YES switch again will un-freeze the display. Analog Calibrate The voltage inputs on each pilot interface are calibrated at the factory to ensure that the units are interchangeable in the field. This procedure applies a known voltage to the optically isolated inputs on the pilot interface and automatically adjusts various calibration parameters in the system to ensure that the voltage sensed by the unit is the same as the real world voltage applied to the system. This menu option allows maintenance personnel to view and optionally recalibrate the low and high calibration values for each analog input. More details on the analog calibration procedure can be found in Trotter Controls Document# PS Normally, factory personnel only perform this calibration. Do not attempt this procedure unless you know what you are doing and have determined that it is necessary. The system will not operate properly if this calibration is not correct. TROTTER CONTROLS, INC. Document# Page 34 of 56

35 Err Msg Index/Counts This feature provides maintenance personnel with a comprehensive list of all possible error messages generated by the system in numerical order. Each error message is preceded with a three-digit error number. If an error has occurred, (the error message has a non-zero count), the error count is displayed in inverse text instead of the error number. The error count includes the number of past (inactive) errors and is followed by * if the error is also currently active. When this menu item is first entered, the first entry displayed (entry number zero) will contain the total number of active errors, or if there are no active errors, will display 000_No errors. If a value other than zero is displayed, this count represents the total number of currently active errors which are present elsewhere in the error table. Using the twist knob to scroll through the error message index will show active errors with a count followed by * to indicate that the error is currently active. Trotter Controls Engineering Report 0075 provides details on the error codes that can be generated by the system. Clear Errors Clears any active errors in the current active error table, but retains the error count (the number of times each error has occurred). This has the same effect as momentarily pressing the RUN PUMP switch to clear active errors. This will also clear hydraulic system errors that may have caused the pump to shut down. Clear Err Counts Clears all errors (and error counts) in the current active error table (but NOT the error history table). This will also clear hydraulic system errors that may have caused the pump to shut down. Clear ErrHistory Clears the error history table. Does NOT affect the current active error table in any way. System Reset Performs a software system reset, which restarts the microprocessor/microcontroller. The same function can be obtained by cycling power to the unit using the circuit breaker panel. Save Memory See Trotter Controls document PS-0035 for details on the types of memory used by the FRDS system as well as memory management procedures. If any changes are made to any parameters (such as the leakage table) which are to be retained beyond the current system run, this option writes these values to EEprom (non-volatile memory) to be recalled at the next system restart. After selecting this option by pushing the selector knob, a secondary menu will be displayed, offering the options Ext (External), Int (Internal), and Both. The default selection is Both. After selecting one of these and pushing the selector knob, memory will be saved to primary (bank A) EEPROM. Page 35 of 56 Document# TROTTER CONTROLS, INC.

36 Secondary (bank B) EEPROM, which is used for emergency backup, is not writable by the user, and is written only at the factory when the unit is first calibrated. Note: If the system was started with FACTORY DEFAULTS (by holding down the NO switch at startup), an additional prompt of SAVE FACTORY VALUES? will occur, warning the user that currently saved memory values are about to be over-written with factory default values. The user can respond with either the YES or NO switch. DON T select YES unless you know what you are doing, this sets all calibration values back to the factory default values. FACTORY USE ONLY: Secondary (bank B) EEPROM can be saved by factory personnel by holding both the YES and LAMP TEST switches in the up position (wait for LED s to turn on) and then pushing the selector knob. Read EEprom This option reloads memory from its last saved state, restoring any changes to parameters that have been made since the last Save Memory operation. After selecting this option by pushing the selector knob, a secondary menu will be displayed, offering the five options Ext, Int, Int (analog cal), Ext (leakage), and Int (leakage) BACKUP. The default selection is Ext, which is the external memory loaded at system restart. After selecting one of these and pushing the selector knob, memory will be read from primary (bank A) EEPROM, either in its entirety, or only the selected region from the selected bank of memory. Secondary (bank B) EEPROM, which is used for emergency backup, can be read by holding the YES switch while pressing the selector knob. See Trotter Controls document PS-0035 for details on the types of memory used by the FRDS system as well as memory management procedures. Compare RAM/EE This option compares current memory with the contents of EEprom, byte-by-byte, displaying any differences. Note that for this option to be completely useful, the system should have been started with FACTORY VALUES by holding the NO/MENU switch down at system startup, which inhibits automatic reading of EEprom. Below the heading of Tw Area RAM Int Ext, several items are displayed on the screen for each byte that differs between RAM and EEprom. The value displayed under the heading Tw is the byte number ( tweak number) in memory. The value displayed under the heading RAM is the value contained in RAM memory. If the system was started with FACTORY VALUES (see above), this value is the factory value. The values displayed under the heading Int is the corresponding value contained in Internal EEprom. The upper value corresponds to bank A memory, while the lower value corresponds to bank B memory. The values displayed under the heading Ext is the corresponding value contained in External EEprom. The upper value corresponds to bank A memory, while the lower value corresponds to bank B memory. The indicator under the heading Area may contain one of the following, depending upon which area of memory the value resides: Leak if the value is within the Leakage Table. Cal if the value is within the Analog Calibration Table. Errs if the value is within the Current Error Table. Hist if the value is within the Error History Table. SWs if the value is within the area of memory for saving user-changeable panel switch settings. TROTTER CONTROLS, INC. Document# Page 36 of 56

37 *Cal if the value is within the Analog Calibration Table, but NOT IN THE AREA THAT SHOULD VARY. (This last indicator SHOULD NOT OCCUR and should be considered an error in the factory section of the calibration table.) If the indicator under the heading Area is blank, the memory byte which is different (between RAM and EEPROM) should be checked to see if there is a specific reason that this value is NOT the same as the factory default value. Note that the values for Tw=6 and Tw=7 will differ if ANY values in that bank are different, as these two values represent the EEPROM checksum. If the values of Tw=6 and Tw=7 are the same for any set of memory banks, those banks are identical. Push the selector knob to display the next value that is different. Press the NO switch to exit the Compare RAM/EE function. Hold the YES switch while pushing the selector knob to skip to the next value in a different Area. For example, use this to bypass listing all differences in the Errs or Hist areas. At the end of the display of all memory values that are different, a Signature Summary screen will appear with five sets of digital signatures (displayed in hexadecimal). Each set contains two signatures the first one is for analog calibration, the second one is for leakage table. The five sets of signatures represent RAM, Internal A, External A, Internal B, and External B. A sample screen is shown at the bottom of the previous page. To skip directly to the Signature Summary screen, depress the RUN PUMP switch momentarily while pushing the selector knob. See Trotter Controls document PS-0035 for details on the types of memory used by the FRDS system as well as memory management procedures. Logo/Version This option displays the logo screen (also displayed at system startup). The logo is displayed until the operator either rotates the selector knob or presses the NO/MENU switch. The Version number and Version Date are also displayed. Pressing YES will display the Version Time. Pressing YES again will display the FRDS intro screen, which contains two digital signatures, one for the Analog Calibration table, and the other for the Leakage Table. These digital signatures are useful to determine if any changes have been made to the Analog Calibration table or the Leakage Table. Pressing YES once more exits this function. Leakage Table Each aircraft is dump tested at the factory and calibrated to compensate for minor differences in the gatebox door and venting system seen on production systems. This leakage table is specific to a given aircraft and must be transferred to any replacement pilot interface. Page 37 of 56 Document# TROTTER CONTROLS, INC.

38 Trotter Controls Document# PS-0035 provides details on the GEN II FRDS memory management features as well as a step-by-step procedure for moving the leakage factors for your aircraft into a replacement pilot interface unit. This feature allows maintenance personnel to view the currently stored leakage table and compare it with the factory-value leakage table. Use the selector knob to scroll the display up or down through the active and factory tables. Press the YES switch to alternate between the active and factory tables to view differences. The coverage levels in the factory table are followed by the indicator F to indicate they are factory values. Active leakage values that differ from the corresponding factory value are highlighted in inverse text. This also includes the column headings for GtD (Gallons to Dump), which can be changed by the user from the default 200, 400, 600 gallons to a different calibration delivery value. Note that it is necessary to use the data wheel to scroll through all of the leakage values since the system uses a four-line display. The left hand column contains the coverage level for each row of leakage values. Leakage factors for a coverage level of 0.5 and 1.0 are shown in the figures above. Each column of data is for the gallons to dump (GtD) settings used to determine each leakage factor. The gallons to dump (or GtD) settings are 200, 400, 600, and 800 in the figures shown above. The leakage factors for each of these settings are shown versus coverage level in the table. For example, the leakage factor for a coverage level of 1.0 and a gallons-to-dump setting of 400 is 32 gallons in the figures shown. Note that the leakage table is not normally changed except by performing calibration test dumps of known quantities of water, which allow the system to learn by repeated dumps. The leakage table can also be changed manually using the Tweak Parameters feature, described below. See Trotter Controls document PS-0035 for details on the types of memory used by the FRDS system as well as memory management procedures. System Operation Parameters (Tweak) (This information also appears in document ER FRDS Gen2 System Operation Parameters.) This feature provides maintenance personnel with a means of viewing and making changes to system parameters that cannot otherwise be viewed or manually altered. This option can be used to manually change leakage tables, calibration tables, and other internal parameters used to control operation of the system. Maintenance personnel may view all parameters. While some parameters can be freely changed by maintenance personnel, other internal system parameters are protected by pass-code and can be modified only while in telephone contact with a factory engineer. TROTTER CONTROLS, INC. Document# Page 38 of 56

39 A detailed list of the system parameters or tweak values are shown in Trotter Controls Engineering Report A partial list of system operation parameters that can be displayed and changed are: Enable / Disable pilot interface display mirroring Leakage Table Analog Calibration Table System Clock System Scan Loop cycle time in various modes (display only) Manual testing of trajectory following parameters using valves in auto-dump mode Detailed System Error Table (including intermittent error counts) Facility for inhibiting the detection and display of certain specific error codes Facility for inhibiting the detection and display of ALL error codes Secondary Error codes for more extensive troubleshooting Internal System Parameters that control: o testing of system watchdog o valve control algorithm testing o defines which of the directional valves are controlled by Gate Open and Close switches when operated in AUTO or TIMER mode o Timer Mode valves for opening and closing gate o valve-control timing and internal tuning parameters o memory read/write (both external and internal memory) o facility for inhibiting checksum errors while reading memory o internal settings for time delays, hydraulic pressure, and other hardware parameters o Many other parameters. Parameters are of two types: o single-byte values (which range in value from 0 to 255) o two-byte (word) values (which range from 0 to 65535). o The value in position zero of the tweak table indicates whether values are expressed in 1 or 2 byte format. If the value of tweak position 0 is 1, the tweak numbers will be listed sequentially, 0, 1, 2, 3, 4, 5, and so on. If the value of tweak position 0 is 2, the tweak numbers will be listed in increments of two 0, 2, 4, 6, 8, and so on. This value can also be toggled between 1 and 2 while in tweak mode by depressing the LAMP TEST switch. To use this feature, select Tweak Parameters from the MAINT menu. Use the twist selector knob to scroll the tweak numbers up or down. Push the selector to scroll rapidly 100 positions in the same direction as the last twist. To change (edit) the value of a tweak number, position the desired number at the top of the screen, and press the YES switch. If the user is authorized to change this value, Edit mode will be entered. When in Edit mode, the value will be highlighted, and twisting the selector will change the value up or down. Pushing the selector button will change the value (by 100) in the direction of the last twist. Pressing LAMP TEST will change the value (by 1000) in the direction of the last twist. Pushing the selector while holding LAMP TEST will change the value (by 10,000) in the direction of the last twist. Page 39 of 56 Document# TROTTER CONTROLS, INC.

40 Note that changing a value by 100, 1000, or is only useful when changing two-byte (word) values. To zero a two-byte (word) value, see change-immediate mode, described below. When the desired value is displayed, press YES to accept the change and store the value in that tweak position. Pressing the NO switch will abort the change and leave the value unchanged. Pressing YES or NO exits tweak edit mode and returns to tweak display mode. Note: While the user is ALWAYS allowed to display the current value of any tweak parameter, the user is limited to changing (using Edit mode) only unprotected tweak values. These unprotected tweak values include areas of the Analog Calibration Table (tweak numbers ), the Leakage Table (tweak numbers 10-89), and some user-changeable tweak values in the range of tweak numbers All other tweak values (currently above tweak number 192) are considered protected and are only changeable with special authorization from a factory engineer. A change-immediate mode is also provided. In this mode, twisting the selector knob will change the value of the parameter IMMEDIATELY, without pressing the YES switch to store the highlighted value. To enter change-immediate mode, press and hold the YES switch while momentarily pushing the selector button. Note that because the value is changed immediately while twisting the selector knob, pressing NO (abort change) has the same affect as pressing YES (accept change). This feature is useful for changing some system parameters (such as PWM duty cycle or GATE switch valve) while simultaneously observing their effect. Pressing the LAMP TEST switch while in change-immediate mode will ZERO the value being edited. To exit tweak display mode, press the NO switch. Programmer note: Tweak position zero, in addition to the values of 1 and 2, may also contain either a value of 9 (byte mode) or 10 (word mode). This will cause the tweak values to be displayed in hexadecimal format instead of decimal. If this value is set to 4, tweak values will be displayed in floating point format. Pressing LAMP TEST will toggle between byte and word mode. Pressing RUN PUMP will toggle between decimal and hex format. Switching from AUTO to TIMER will change to floating point display. Switching back to AUTO will display in hex (either word or byte) mode. See Trotter Controls document ER-0074 for details on various system operation parameters ( tweaks ) and adjustment procedures. TROTTER CONTROLS, INC. Document# Page 40 of 56

41 FRDS Menu Tree Below is a diagram of the FRDS menu system. FRDS MENU TREE (Revised 04/08/2010) YES/FOAM SW MAIN AUTO/TIMER DISPLAY NO/MENU SW Notes: [X] 1. HIGHLIGHT AN ITEM THEN PUSH SELECTOR KNOB TO ENTER SUBMENU 2. YES SW CAN BE USED FOR ACTIVATING OUTPUTS NO SWITCH CAN BE USED FOR DEACTIVATING OUTPUTS 3. SELECTOR KNOB WILL EXIT THIS SUBMENU 4. NO SWITCH WILL EXIT THIS SUBMENU PRESS SELECTOR KNOB FOAM INJECT MAIN MENU MAINT CONFIG SYSTEST FUEL FERRY TWEAK PARAMETERS [4] AIRCRAFT ERROR HISTORY DIGITAL INPUTS [3] LEARN DIGITAL INPUT MAP [3] HARDWARE PILOT (NO DOORS) PILOT (ALL) AUTO SALVO MAN SALVO MAINT SYSTEST DIGITAL OUTPUTS [2][3] DIGITAL OUTPUT MAP [3] ANALOG INPUTS [3] ANALOG CALIBRATE [3] ERR MSG INDEX/COUNTS[3] CLEAR ERRORS CLEAR ERR COUNTS PHOTO ACCEL ONE ACCEL TWO GATE ANGLE HOPPER CLEAR ERR HISTORY HYD PRES PRESS SEL. KNOB TO CLEAR ERRORS VERSION SYSTEM RESET [4] SAVE MEMORY [4] READ EEPROM [4] COMPARE RAM/EE [4] LOGO/VERSION [4] BOTH EXT INT FOAM GAL BATT + 24 V DERIVED G * PANEL TEMP * *UNABLE TO BE CALIBRATED LEAKAGE TABLE [4] EXT (EXTERNAL) YES INT (INTERNAL) DATE/TIME YES ACTIVE FACTORY YES INT (ANALOG CAL) EXT (LEAKAGE) INT (LEAKAGE) BACK UP EXT (ANALOG CAL) BACKUP AIRCRAFT CAL/LEAK SIGNATURES YES MAIN DISPLAY Figure 4 ~ FRDS menu tree Page 41 of 56 Document# TROTTER CONTROLS, INC.

42 Error Overview A detailed description of the error codes, their meaning, and possible error resolution actions are presented in Trotter Controls Engineering Report An abbreviated description of the types of errors that can be detected is presented below. The GENII FRDS system has comprehensive built in diagnostics to detect the following problems: Broken wires Burned out valve coil Blown fuse Stuck hydraulic valve Faulty Pressure Switch Faulty Pressure Sensor Faulty Microprocessor Output Faulty Relay Faulty pump Other hardware faults System errors Some errors are checked anytime power is applied to the system and the operation mode is AUTO or TIMER. These error conditions are checked passively (meaning that no valve or control action is required for the test). Passive errors are detected during Auto and Timer mode operation of the FRDS when the HYD PWR switch is on. Some passive errors can only be detected when the HYD PWR switch AND the ARMED switches are on. Testing for other error conditions requiring that a valve or other output be turned on is performed during the Pilot Assisted Test or Maintenance Tests (SysTest). These SysTest errors are detected during the Pilot Assisted test or the Maintenance Test. If a failure is detected during the SysTest diagnostics, a persistent error code 021 or 105 is saved (See System Test Persistent Errors on Page 30). System errors have to do with the operating software and hardware internal to the CPU chip. These errors should not normally occur. A brief description of the types of faults and the resulting system status is shown in the following sections. Detected errors will affect the operation of the system. A message will be displayed showing the effect of detected errors on system operation. Please note, errors 112, 113 and 114 will be accompanied by the primary error causing one of the following, Reduced Accuracy Error Code Displayed: 112_Accuracy Loss This state indicates that the system has full redundancy but the amount of fluid delivered may not be accurate. TROTTER CONTROLS, INC. Document# Page 42 of 56

43 The pilot should be aware that the system may yield inaccurate delivery results (i.e. flow rate or delivered gallons not accurate) when this state is displayed and fly accordingly. The AUTO armed light flashes and is not steady on when this state is detected. Typically, this is caused by the hydraulic pressure being too low to operate the doors quickly. This indicates that the control system is operational but the accuracy of the delivery has been compromised. For example, the hydraulic pressure is low which may cause the gates to operate slowly causing more or less water to be dumped. Reduced Redundancy (AUTO/TIMER mode only) Error Code Displayed: 114_Redundancy Loss This state indicates that the system may have a problem with one or more the redundant SALVO systems or hydraulic valve. This can be caused by any fault detected in the primary system, backup electro-mechanical system, or backup supervisor system. The pilot should be aware that the system might yield inaccurate delivery results or not open as expected when this state is displayed and fly accordingly. The AUTO armed light flashes and is not steady on when this state is detected. This error indicates that one or more of the backup dump control systems has been compromised and may be inoperable. For example the Auto Salvo system (up) and/or the electro-mechanical Salvo system, may be inoperable Note that when the system is operated in manual mode, there is no system redundancy. Reduced Accuracy & Redundancy (AUTO/TIMER mode only) Error Code Displayed: 113_Accur+Redun Loss This indicates that errors that would cause a combination of both accuracy and redundancy loss have been detected. The pilot should be aware that the doors may not open when this state is displayed and fly accordingly. The AUTO armed light flashes and is not steady on when this state is detected. Note that when the system is operated in manual mode, there is no system redundancy. Clearing Pump Errors When the system is operated in AUTO or TIMER mode, the system can detect a number of errors with the pump. When an error is detected, the hydraulic pump is disabled to prevent possible damage to the pump. Pump errors can be cleared by pressing the RUN PUMP switch. Note that the pump can be forced to operate in all modes by holding the RUN PUMP switch down. Page 43 of 56 Document# TROTTER CONTROLS, INC.

44 Caution: Holding the RUN PUMP switch down continuously will cause the pump to build pressure until the pump s mechanical pressure relief valve is activated. This pressure is in excess of the system s normal operating pressure. Caution: The system cannot disable pump operation when operated in the MAN mode. Please verify that adequate oil is present in the system before operating the system in MAN mode. The pilot should monitor the PUMP ON LED on the pilot interface to make sure that the pump is not operated continuously due to some fault condition. Setting System Preferences The pilot is able to adjust the default parameter settings for AUTO and TIMER modes of operation. To set the power up defaults for AUTO and TIMER modes, do the following: 1. Power up the unit. 2. Set the mode switch to AUTO 3. Adjust the coverage and gallons to dump settings as desired 4. Set the mode switch to TIMER 5. Adjust the timer settings as desired 6. Press the NO/MENU switch to access the main menu 7. Select MAINT => SAVE MEMORY => BOTH The settings for AUTO and TIMER set in steps 3 and 5 above are now the new default settings that are active when power is applied to the system. Maintenance Trotter Controls Engineering Report 0077 is a detailed preventative maintenance document for the system. Please refer to this document for details on the recommended preventative maintenance for the GENII FRDS unit. There are various fuses and relays in the system that are user-replaceable items if required. These fuses are located in the relay enclosure located on the RH side of the aircraft behind the baggage compartment. Fuse, Relay, & Status LED Location and Function The GEN II FRDS unit incorporates protection for all the wiring on the aircraft per applicable FAA regulations and Air Tractor standard design criteria. TROTTER CONTROLS, INC. Document# Page 44 of 56

45 Figure 5 ~ Relay enclosure located on the RH side of the fuselage behind the baggage compartment. Fuses used to limit the maximum current possible are located inside the relay enclosure and are mounted to the various printed circuit boards mounted in the enclosure. These fuses can be replaced by the user if required. The various relays used to control the electro-mechanical system are also included in the relay enclosure and are mounted on the circuit board. These relays are socket mounted and can be replaced by the user if necessary. The circuit boards located inside the relay enclosure also have various LED s on them to indicate the status of fuses, relays, outputs, and other items. The function and locations of relay, fuses, and LED s are shown in the following tables and pages for reference. Page 45 of 56 Document# TROTTER CONTROLS, INC.