Central Warning Systems

CIRRUS AIRPLANE MAINTENANCE MANUAL Central Warning Systems CHAPTER 31-50: CENTRAL WARNING SYSTEMS GENERAL 31-50: CENTRAL WARNING SYSTEMS 1. General This section describes the Indicating/Recording Systems which consists of a Crew Alerting System (CAS) and related sensors and switches. A. Crew Alerting System Aircraft annunciations and alerts are displayed in the Crew Alerting System (CAS) window located to the right of the altimeter and VSI. Aircraft annunciations are grouped by criticality and sorted by order of appearance with the most recent message on top. The color of the message text is based on its urgency and required action: Warning (red) Immediate crew awareness and action required. Caution (yellow) Immediate crew awareness and future corrective action required. Advisory (white) Crew awareness required and subsequent action may be required. In combination with the CAS window, the system issues an audio alert when specific system conditions are met and an expanded description of the condition is displayed in the Alerts Window located in the lower RH corner of the PFD. For additional Crew Alerting System information for the Perspective+ Integrated Avionics System refer to the latest revision of Cirrus Perspective+ Line Maintenance Manual. (Refer to 5-00) 1 23 Dec 2016

CHAPTER 31-50: CENTRAL WARNING SYSTEMS 2. Troubleshooting CIRRUS AIRPLANE MAINTENANCE MANUAL A. Warnings CAS Warning Text Alerts Window Text Definition ANTI ICE CTL Serials w/ Ice Protection: Tank valves cannot be controlled (closed) (TKS). There is no control over the 3-way valve in AUTO or Manual, typical of GIA failure. ANTI ICE QTY Serials w/ Ice Protection: Left and right fluid quantities are unknown (TKS) Left and Right tank QTY is INVALID causing the 3-way valve to close both Left and Right supply lines, typical of GIA failure. ANTI ICE QTY AOA OVERHEAT Serials w/ Ice Protection: Fluid quantity is low (TKS). Serials w/ Ice Protection: AOA probe is overheated. In NORM/HIGH/MAX/PUMP BKUP mode the total QTY < 0.5 gal. The Lift Transducer heater thermocouple senses a temperature > 255 ºF (124 ºC). AUTO DESCENT Aircraft descent to 14,000 feet in 60 seconds. Emergency descent warning. AUTO DESCENT Aircraft descent to 14,000 feet. Emergency descent in progress (initial descent) AUTO DESCENT Aircraft descent to 12,500 feet. Emergency descent in progress (secondary descent) BRAKE TEMP Brake temperature is high. Brake temperature > 293 F. CHT Cylinder head temperature is high. Temperature of one or more cylinder heads > 460 F. CO LVL HIGH Carbon monoxide level is too high. Carbon monoxide level is too high. ESS BUS Check essential power bus voltage. Voltage output for Alternator 1 or Alternator 2 < 24.5v for more than 20 seconds or > 32.0v. This is usually associated with an Alternator 1 or Alternator 2 failure and will be displayed in combination with a M BUS 1 or M BUS 2 voltage annunciation for the corresponding Alternator. FLAPS ICE Serials w/ Ice Protection: Full flaps prohibited in icing conditions. Flaps at 100% and ice protection system on. FUEL FLOW SR22 Serials: Check fuel flow. Fuel flow > 30 GPH. FUEL IMBALANCE Check fuel imbalance. Sensed imbalance > 12 gallons. FUEL QTY Check fuel tank levels. Fuel Totalizer quantity < 9 gallons. 2 27 Dec 2017

CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 31-50: CENTRAL WARNING SYSTEMS CAS Warning Text Alerts Window Text Definition M BUS 1 Check main power bus 1 voltage. Alternator voltage output > 32.0v. This is usually associated with an alternator failure M BUS 2 Check main power bus 2 voltage. Alternator voltage output > 32.0v. This is usually associated with an alternator failure MAN PRESSURE SR22T Serials: Check manifold pressure. Manifold pressure > 38.0 inhg for 30 seconds OR > 38.5 inhg. OIL PRESS Oil pressure is out of range. Oil pressure < 10 psi or > 100 psi. If low oil pressure is low, the engine has probably lost a significant amount of its oil and engine failure may be imminent. If low oil pressure is accompanied by normal oil temperature, it is possible that the oil pressure sensor, gage, or relief valve is malfunctioning. OIL TEMP Oil temperature is high. Oil temperature > 240 F. OXYGEN FAULT OXYGEN QTY Serials w/ Oxygen: Oxygen system fault. Serials w/ Oxygen: Oxygen quantity is low. Tank solenoid has failed (open or closed) or flow rate is low. If flow is checked and confirmed present, solenoid has failed open. Altitude > 10,000 ft and tank pressure < 400 psi. RPM Check engine RPM. Engine speed is between 2710 RPM and 2730 RPM for 10 seconds or more, OR engine speed > 2730 RPM for 5 seconds or more. STALL Stall warning. Impending stall. START ENGAGED Starter is engaged. Starter stuck engaged. MCU detects 24 VDC to Starter 30 seconds after initial engagement. TIT SR22T Serials: TIT temperature is high. LH or RH TIT > 1750 UNDERSPEED PROTECT ACTIVE None Underspeed Protection (USP) is active. 3 27 Dec 2017

CHAPTER 31-50: CENTRAL WARNING SYSTEMS CIRRUS AIRPLANE MAINTENANCE MANUAL B. Cautions CAS Caution Text Alerts Window Text Definition ALT 1 Check alternator 1 current. Illumination of ALT 1 indicates that the ampere output < 2 amps for 20 seconds or more. ALT 2 Check alternator 2 current. Illumination of ALT 2 indicates that the ampere output < 2 amps for 20 seconds or more. ALT AIR OPEN ANTI ICE HEAT SR22T Serials: Alternate air door is open. Serials w/ Ice Protection: Stall warning/aoa heater has failed. Alternate air door is open. With the Pitot Heat switch is ON, the lift transducer heater current sensor does not sense adequate current. ANTI ICE LEVEL Serials w/ Ice Protection: Left tank fluid quantity is unreliable (TKS). There is a conflict between the level sender and the level switch: Quantity > 0.25 gal and Switch is Empty, OR Quantity = Out Of Range ANTI ICE LEVEL ANTI ICE PRESS ANTI ICE PRESS ANTI ICE QTY ANTI ICE QTY ANTI ICE SPEED Serials w/ Ice Protection: Right tank fluid quantity is unreliable (TKS). Serials w/ Ice Protection: Tail pressure is low (TKS). Serials w/ Ice Protection: Pressure is high (TKS). Serials w/ Ice Protection: Fluid quantity imbalance has been detected (TKS) Serials w/ Ice Protection: Fluid quantity is low (TKS) Serials w/ Ice Protection: Airspeed is too low for ice protection (TKS). There is a conflict between the level sender and the level switch: Quantity > 0.25 gal & Switch is Empty, OR Quantity = Out Of Range In NORM mode, one or more horizontal and/or elevator tip panels is not receiving adequate pressure. Horizontal Pressure < 2.0 psi Elevator Tip Pressure < 1.5 psi In HIGH/MAX/PUMP BKUP mode, one or more horizontal and/or elevator tip panels is not receiving adequate pressure. Horizontal Pressure < 2.0 psi Elevator Tip Pressure < 1.5 psi In NORM/HIGH/PUMP BKUP mode, the high pressure switch between the filter and metering pumps senses excessive pressure Sensed Pressure > 150 psi. LH/RH fluid quantity imbalance > 1.0 gal. In NORM/HIGH/MAX/PUMP BKUP mode the total QTY < 1.0 gal. With the system ON and Flaps at 0%, the indicated airspeed < 95 KIAS 4 23 Dec 2016

CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 31-50: CENTRAL WARNING SYSTEMS CAS Caution Text Alerts Window Text Definition ANTI ICE SPEED AP MISCOMPARE AP/PFD DIF ADC AP/PFD DIF AHRS Serials w/ Ice Protection: Airspeed is too high for ice protection (TKS). Autopilot miscompare, autopilot is not available. Autopilot and PFD are using different ADCs. Autopilot and PFD are using different AHRSs. With the system ON, indicated airspeed > 177 KIAS, OR true airspeed > 204 KTAS. Autopilot miscompare, autopilot is not available. Autopilot and PFD are using different ADCs. Autopilot and PFD are using different AHRSs. AVIONICS OFF AVIONICS switch is off. AVIONICS switch is off. BATT 1 Check battery 1 current. Battery 1 current is discharging at a rate > 4 amps for 30 seconds or more. BRAKE TEMP Brake temperature is high. Brake temperature is between 270 to 293 F for more than 5 seconds. CHT Cylinder head temperature is high. Temperature of one or more cylinder heads has exceeded 420 F. FLAP OVERSPEED Flaps are extended beyond airspeed limitations. Flaps at 100%, airspeed > 109 KIAS for 5 seconds or more, OR Flaps at 50%, airspeed > 124 KIAS for 5 seconds or more. FUEL IMBALANCE Check fuel imbalance. Sensed imbalance > 10 gallons. FUEL QTY Check fuel tank levels. Check fuel tank levels. M BUS 1 Check main power bus 1. Illumination of M BUS 1 indicates that the alternator voltage output < 24.5v. This is usually associated with an alternator failure. M BUS 2 Check main power bus 2. Illumination of M BUS 2 indicates that the alternator voltage output < 24.5v. This is usually associated with an alternator failure. MAN PRESSURE NO ADC MODES NO VERT MODES SR22T Serials: Check manifold pressure. Autopilot air data modes are not available. Autopilot vertical modes are not available. Manifold pressure > 36.5 inhg for 5 minutes OR > 37.0 inhg for 2 minutes. Autopilot air data modes are not available. Autopilot vertical modes are not available. OIL PRESS Oil pressure is out of range. Oil pressure between 10 psi and 30 psi at or above 1000 RPM. This message will appear prior to engine start and should clear after engine start. 5 27 Dec 2017

CHAPTER 31-50: CENTRAL WARNING SYSTEMS CIRRUS AIRPLANE MAINTENANCE MANUAL CAS Caution Text Alerts Window Text Definition OIL TEMP Oil temperature is high. Oil temperature > 235 F. OXYGEN QTY Serials w/ Oxygen: Oxygen quantity is low. Altitude > 10,000 ft and tank pressure < 800 psi. OXYGEN RQD Serials w/ Oxygen: Oxygen is required. Oxygen is required. PARK BRAKE Parking break is set. Parking break is set. PITOT HEAT FAIL Pitot heat failure. Pitot heat failure. Displayed when Pitot heat switch is ON and Pitot heat current is not detected. PITOT HEAT REQD Pitot heat is required. Displayed 20 seconds after system detects OAT < 41 F (5 C) and Pitot Heat Switch is OFF. START ENGAGED Starter is engaged. Starter stuck engaged. MCU detects 24 VDC to Starter 15 seconds after initial engagement. C. Advisories CAS Advisory Text Alerts Window Text Definition ALTITUDE SEL Climbing away from selected altitude. Climbing away from selected altitude for more than 5 seconds. ALTITUDE SEL AOA FAIL Descending away from selected altitude. Serials w/ Ice Protection: Dynamic stall speed band is not available. Descending away from selected altitude for more than 5 seconds. The red airspeed tape on the PFD is no longer dynamically adjusted by the lift transducer and reverts to published stall speeds. ARE YOU ALERT? Are you alert? No pilot interaction within a reasonable time period. COURSE SEL Current track will not intercept selected course. Current track will not intercept selected course. FUEL IMBALANCE Check fuel imbalance. Sensed imbalance > 8 gallons. L FUEL QTY Check left fuel tank level. Left fuel quantity < 18 gallons. OXYGEN LEFT ON OXYGEN QTY Serials w/ Oxygen: Oxygen system is left on after shutdown. Serials w/ Oxygen: Oxygen quantity is low. Oxygen system is left on after shutdown. Altitude < 10,000 ft and tank pressure < 800 psi. 6 27 Dec 2017

CIRRUS AIRPLANE MAINTENANCE MANUAL CHAPTER 31-50: CENTRAL WARNING SYSTEMS CAS Advisory Text Alerts Window Text Definition PUMP BACKUP Serials w/ Ice Protection: Anti-ice backup pump mode has been selected (TKS). The system may be operating in two system modes simultaneously. R FUEL QTY Check right fuel tank level. Right fuel quantity < 18 gallons. D. Comparator Window Messages Comparator Window Text ALT MISCOMP IAS MISCOMP HDG MISCOMP PIT MISCOMP ROL MISCOMP ALT NO COMP IAS NO COMP HDG NO COMP PIT NO COMP ROL NO COMP Condition Difference in altitude sensors > 200 ft. If both airspeed sensors detect < 35 knots, this is inhibited. If either airspeed sensor detects > 35 knots, and the difference in sensors > 10 kts. If either airspeed sensor detects > 80 knots, and the difference in sensors > 7 knots. Difference in heading sensors > 6 degrees. Difference in pitch sensors > 5 degrees. Difference in roll sensors > 6 degrees. No data from one or both altitude sensors. No data from one or both airspeed sensors. No data from one or both heading sensors. No data from one or both pitch sensors. No data from one or both roll sensors. E. Reversionary Sensor Messages Reversionary Sensor Window Text Condition USING ADC2 The PFD is displaying ADC data from ADAHRS 2. USING AHRS2 The PFD is displaying AHRS data from ADAHRS 2. 7 23 Dec 2016

CHAPTER 31-50: CENTRAL WARNING SYSTEMS CIRRUS AIRPLANE MAINTENANCE MANUAL F. Alerts Messages Alerts Window Message ANTI ICE QTY Fluid quantity is low (TKS). CO DET FAIL The carbon monoxide detector is inoperative. CO DET SRVC The carbon monoxide detector needs service. ESP CONFIG ESP config error. Config service required. ESP FAIL ESP is inoperative. ESP OFF ESP selected off. ESP DEGRADE ESP IAS mode is inoperative. EXIT ICING Exit icing conditions. FAILED PATH An autopilot servo data path has failed. MFD FAN FAIL The cooling fan for the MFD is inoperative. PFD FAN FAIL The cooling fan for PFD is inoperative. Condition Serials w/ Ice Protection: While system is OFF, the total QTY < 1.0 gal. Carbon monoxide detector fault. Carbon monoxide detector fault. ENABLE / unlock mis-match for ESP. Software for ESP option was not installed as specified in Service Bulletin 2X-22-07. GFC 700 is unavailable. Pilot DISABLED ESP. ADC failure, limited GFC availability. Serials w/ Ice Protection: The system has been operating for 30 min continuously. Servo or servo wiring fault. Cooling fan fault. Cooling fan fault. 8 23 Dec 2016