PSK203/PSK223/PSK233. Digital Thermostats for Low Temperature Refrigerating Units 1 GETTING STARTED PSK203 PSK223 PSK233

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1 September 2012 / Bulletin PSK203/PSK223/PSK233 Digital Thermostats f Low Temperature Refrigerating Units INSTALLATION OPERATING INSTRUCTIONS 1 GETTING STARTED 1.1 Imptant Read these instructions carefully befe installing operating this controller follow all additional infmation f installation electrical connection. Keep this guide f future reference. accding to the safety regulations, the protection against touching electrical parts must be ensured by proper installation of the device; the parts that ensure this protection must be installed so that they can not be removed without the use of a tool. 1.3 Wiring diagram 1.2 Installing the controller Size - mm (inches) 33.0 (1.299) Electrical Connection PSK203 PSK203 K1 K3 K2 max. 10 A (2.322) 75.0 (2.952) panel cut out A B power supply cabinet evap. comp. evap. fan defrost electric system 83.0 (3.267) Dimension Minimum Typical Maximum mm inches mm inches mm inches A B PSK223 max. 10 A K2 K1 K3 PSK serial pt Installation - Panel mounting, with click brackets (supplied by the builder). electric system defrost comp. evap. fan power supply evap. cabinet multip./do switch PSK233 K3 K1 K2 max. 10 A PSK233 serial pt Additional infmation f installation: 59.0 mm (2.322 inches) is the maximum depth with screw terminal blocks 83.0 mm (3.267 inches) is the maximum depth with extractable terminal blocks the panel thickness must not be greater than 8.0 mm (0.314 in) wking conditions (wking temperature, humidity, etc.) must be between the limits indicated in the technical data do not install the controller close to heating sources (heaters, hot air ducts, etc.), devices provided with large magnets (speakers, etc.), locations subject to direct sunlight, rain, humidity, dust, mechanical vibrations bumps power supply evap. fan comp. defrost Additional infmation f electrical connection: do not use electric/pneumatic screwdrivers/wrenches on the terminal blocks if the controller has been moved from a cold location to a warm one, condensation can occur on the inside of the unit; wait at least one hour befe attempting to power up use the controller multip./do switch cabinet evap.

2 Page 2 Bulletin make sure that the supply voltage frequency are crect f the power supply of the controller : LED will flash always disconnect power from the controller befe servicing it do not operate f 15 seconds. this controller is not intended to be used as a safety control device You also can modify the wking setpoint through parameter SP. within 15 seconds; also look at parameters r1, r2 r3 f repair servicing, contact your Parker Splan Sales Engineer first. 3.2 Setting configuration parameters 2 USER INTERFACE To gain access to the procedure: make sure no procedure is running 2.1 Turning on/off the controller hold The unit is turned on when power is supplied to it, likewise turns off when power is removed. Through the digital input it is also possible to turn off the controller remotely via software; in this case the controller remains connected to the power supply the regulats are turned off. f 4 seconds: the display will show PA within 15 seconds to set display to -19 do not press any other button f 15 seconds hold f 4 seconds: the display will show SP. To select a parameter: 2.2 The display If the controller is turned on, during the nmal operation the display will show the quantity set f parameter P5. To modify a parameter: 2.3 Showing the temperatures read by the probes make sure the keyboard is not locked no procedure is running press do not press any other button f 15 seconds. hold available label To quit the procedure: f 2 seconds: the display will show the first p ress to select Pb1 (cabinet probe), Pb2 (evapat probe) Pb3 (condenser probe) To quit the procedure: do not operate f 60 seconds press as long as the display shows the quantity you have set with parameter P5 do not operate f 60 seconds. If the evapat probe is not enabled (parameter P3 = 0), the label Pb2 will not be shown. If the condenser probe is not enabled (parameter P4 = 0), the label Pb3 will not be shown. within 15 seconds hold button f 60 seconds. f 4 seconds do not press any other Switch off/on the power supply of the controller after the modification of the parameters. 3.3 Resting the default value of configuration parameters make sure no procedure is running hold f 4 seconds: the display will show PA do not press any other button f 15 seconds hold within 15 seconds to set the display to 743 f 4 seconds: the display will show def 2.4 Activating the defrost by h make sure the keyboard is not locked no procedure is running do not press any other buttons f 15 seconds: the press display will flash def f 4 seconds, after which the controller will quit the procedure hold f 4 seconds. If the function of the evapat probe is the one of defrost probe (parameter P3 = 1) to the defrost activation the evapat temperature is above the one you have set with parameter d2, the defrost will not be activated. within 15 seconds to set the display to 149 switch the controller off then back on after these procedures then confirm that the default values have been reset. Make sure the default value of the parameters is crect, in particular note if the probes are PTC probes. 2.5 Locking/unlocking the keyboard To lock/unlock the keyboard: make sure no procedure is running p ress hold f 2 seconds: the display will show Loc / UnL f 1 second 2.6 Silencing the alarm make sure no procedure is running press (but do not hold) any button (pressing any button without holding it will not initiate the nmal comm f that button). 3 SETTINGS 3.1 Setting the wking setpoint make sure the keyboard is not locked no procedure is running 4 SIGNALS 4.1 Signals LED INDICATIONS LED compress if lit, the compress will be turned on if flashing: the modification of the wking setpoint will be running a compress protection will be running (parameters C0, C1, C2 i7) LED defrost if lit, the defrost will be running if flashing: the defrost will be required but a compress protection will be running (parameters C0, C1 C2)

3 Bulletin Page 3 the drip cycle will be running (parameter d7) the heating of the freezing fluid will be running (parameter da) LED evapat fan if lit, the evapat fan will be turned on if flashing, after the drip cycle evapat fan delay will be running (parameter F3) LED alarm if lit, an alarm will be running C C LED if lit, the unit of measure of the temperatures will be degree Celsius (parameter P2) F F LED if lit, the unit of measure of the temperatures will be degree Fahrenheit (parameter P2) CODE EXPLANATION Loc the keyboard / the wking setpoint are locked (parameter r3); also look at paragraph ALARMS 5.1 Alarms CODE MEANING AL Low temperature alarm (parameters A0, A1 A2) AH High temperature alarm (parameters A3, A4 A5) id Do switch input alarm (parameters i0 i1) ia Multipurpose input alarm (parameters i0, i1 i5) isd Controller locked alarm (parameters i0, i1, i5, i7, i8 i9) COH Overheated condenser alarm (parameter C6) CSd Compress locked alarm (parameter C7) When the cause of the alarm disappears, the controller restes to nmal operation, except f the controller locked alarm (code isd ) the compress locked alarm (code CSd ). These alarms can only be reset by switching the power supply to the controller off/on. 6 INTERNAL DIAGNOSTICS 6.1 Internal diagnostics CODE EXPLANATION Pr1 Cabinet probe err (parameter P0) Pr2 Evapat probe err (parameter P0) When the cause that initiated the alarm is crected, the controller returns to nmal operation. 7 TECHNICAL DATA 7.1 Technical data Frontal bezel protection: IP 65. Connections (use copper conducts only): screw terminal blocks (power supply, inputs outputs) on PSK203; extractable terminal blocks on PSK223 PSK233. Wking temperature: from 0 to 55 C (32 to 131 F) 10 to 90% of relative humidity without condensate). Power supply: 115 VAC/230 VAC, 50/60 Hz, 3 VA (approximate). Insulation class: 2. Alarm buzzer: present on PSK223 PSK233. Measure inputs: 2 (cabinet probe evapat probe) f PTC/ NTC probes. Digital inputs (only PSK223 PSK233): 1 (multipurpose/do switch) f NO/NC contact (5V, 1 ma). Wking range: from to C (-50 to 300 F) f PTC probe, from to C (-40 to 220 F) f NTC probe. Resolution: 0.1 C/1 C/1 F. Digital outputs - 3 relays: compress relay: 16 res. 250 VAC, 5 FLA, 30 LRA (NO contact) in PSK203; 30 res. 250 VAC, 12 FLA, 72 LRA (NO contact) in PSK233; 8 res. 250 VAC, 2 FLA, 12 LRA otherwise defrost relay: 8 res. 250 VAC, 2 FLA, 12 LRA (change-over contact) evapat fan relay: 8 res. 250 VAC, 2 FLA, 12 LRA (NO contact) in PSK203; 5 res. 250 VAC otherwise. The maximum current allowed on the load is 10 A. Serial pt: pt f communication with a management system (through a serial interface, via TTL, with MODBUS communication protocol) with the programming key; not available in PSK CONFIGURATION PARAMETERS 8.1 Configuration parameters Parameters Minimum Maximum U.M. DEF. Wking Setpoints SP r1 r2 C/ F 0.0 wking setpoints Parameters Minimum Maximum U.M. DEF. Temperature Inputs CA C/ F 0.0 cabinet probe offset CA C/ F 0.0 evapat probe offset P kind of probe 0 = PTC 1 = NTC P P display decimal point value during nman operation (Celsius mode only) 1 = YES unit of measure, temperature 0 = C 1 = F

4 Page 4 Bulletin Configuration parameters (continued) Parameters Minimum Maximum U.M. DEF. Temperature Inputs (continued) P P evapat probe function 0 = probe not enabled 1 = defrost probe thermostat probe f the evapat fan 2 = thermostat probe f the evapat fan quantity to show during the nmal operation 0 = cabinet temperature 1 = wking setpoint 2 = evapat temperature 3 = cabinet temperature - evapat temperature Parameters Minimum Maximum U.M. DEF. Setpoints r C/ F 2.0 wking setpoint differential r r2 C/ F minimum wking setpoint r2 r C/ F 50.0 maximum wking setpoint r r C/ F 0.0 Parameters Minimum Maximum U.M. DEF. Compress Protections lock the wking setpoint (with the procedure related in paragraph 3.1) 1 = YES temperature increase during Energy Saving function (only PSK223 PSK233); also look at i5 C min 0 compress delay after turning on the controller C min 5 minimum time between two activations in succession of the compress; also compress delay from the end of the cabinet probe err C min 3 minimum time the compress remains turned off C s 0 minimum time the compress remains turned on C min 10 time the compress remains turned off during the cabinet probe err; also look at C5 C min 10 time the compress remains turned on during the cabinet probe err; also look at C4 Parameters Minimum Maximum U.M. DEF. Defrost d h 8 defrost interval; also look at d8 0 = the defrost at intervals will never be activated d kind of defrost 0 = electric defrost 1 = hot gas defrost d C/ F 2.0 defrost termination temperature (only if P3 = 1) d min 30 d defrost duration if P3 = 0 2; defrost maximum duration if P3 = 1 0 = defrost will never be activated defrost when you turn on the controller 1 = YES d min 0 defrost delay when you turn on the controller (only if d4 = 1); also look at i5 d d min 2 drip duration d d C/ F 0.0 temperature shown during the defrost 0 = cabinet temperature 1 = if, upon activation of defrost, the cabinet temperature is below wking setpoint + r0, at most wking setpoint + r0 ; if, upon activation of defrost, the cabinet temperature is above wking setpoint + r0, at most the cabinet temperature to the defrost activation kind of defrost interval 0 = the defrost will be activated when the controller has remained turned on f time d0 1 = the defrost will be activated when the compress has remained turned on f time d0 2 = the defrost will be activated when the evapat temperature has remained below temperature d9 f time d0 evapat temperature above which the count of the defrost interval is suspended (only if d8 = 2) da 0 99 min 0 minimum time the compress must remain turned on befe defrost can be activated (only if d1 = 1)

5 Bulletin Page Configuration parameters (continued) Parameters Minimum Maximum U.M. DEF. Temperature Inputs Alarms(continued) A measured input used f the low temperature alarm 0 = cabinet temperature 1 = evapat temperature A C/ F temperature below which the low temperature alarm is activated; also look at A0 A2 A kind of lower temperature alarm 0 = alarm not enabled 1 = relative to the wking setpoint ( wking setpoint - A1 ; consider A1 without sign) 2 = absolute ( A1) A C/ F 10.0 temperature above which the high temperature alarm is activated; also look at A3 A5 A kind of upper temperature alarm 0 = alarm not enabled 1 = relative to the wking setpoint ( wking setpoint + A4 ; consider A4 without sign) 2 = absolute ( A4) A min 120 high temperature alarm delay since you turn on the controller (only if A3 = 0) A min 15 temperature alarm delay A min 15 high temperature alarm delay since the end of the after dripping evapat fan delay (only if A3 = 0) A min 15 high temperature alarm delay since the deactivation of the do switch input (only PSK223 PSK233) Parameters Minimum Maximum U.M. DEF. Evapat Fan F evapat fan activity during the nmal operation 0 = turned off 1 = turned on 2 = accding to the compress 3 = accding to F1 4 = turned off if the compress is turned off; accding to F1 if the compress is turned on F C/ F -1.0 evapat temperature above which the evapat fan is turned off (only if F0 = 3 4) F evapat fan activity during defrost drip delay 0 = turned off 1 = turned on 2 = accding to F0 F min 2 fan delay after evapat drip completes Parameters Minimum Maximum U.M. DEF. Digital Inputs Only PSK223 PSK233 i kind of digital input 0 = MULTIPURPOSE INPUT - in this case look at parameters i1, i5, i7, i8 i9 1 = RESERVED 2 = DOOR SWITCH INPUT - in this case look at parameters i1, i2 i3; the activation of the input will turn off the evapat fan (f at most time i3 until the input is deactivated) 3 = DOOR SWITCH INPUT - in this case look at parameters i1, i2 i3; the activation of the input will turn off the compress the evapat fan (f at most time i3 until the input is deactivated) i digital input contact type 0 = NO (the input will be active if you close the contact) 1 = NC (the input will be active if you open the contact) 2 = input not enabled i min 30 delay befe the do switch alarm is activated -1 = no signal i min 15 maximum duration of the effect provoked by the activation of the do switch input -1 = the effect will last as long as the input will be deactivated i effect provoked by the activation of the multipurpose input 0 = no effect 1 = SYNCHRONIZING THE DEFROSTS - after time d5, the defrost will be activated 2 = ACTIVATING ENERGY SAVING - Energy Saving function will be activated (until the input is deactivated); also look at r4 3 = ACTIVATING THE EXTERNAL ALARM - after time i7, the display will flash the code ia the buzzer will be activated (until the input is deactivated) 4 = ACTIVATING THE COMPRESSOR LOCKOUT - the compress will be turned off, the display will flash the code ia the buzzer will be activated (until the input is deactivated); also look at i7, i8 i9 5 = TURNING OFF THE CONTROLLER - the controller will be turned off via software (until the input is deactivated); also look at C0, d4 A6 6 = ACTIVATE COOLING (only PSK223 PSK233) - the compress will be turned on (until the input is deactivated); in this case parameters C4 C5 are not meaningful

6 Page 6 Bulletin Configuration parameters (continued) Parameters Minimum Maximum U.M. DEF. Digital Temperature Inputs Inputs Only (continued) PSK223 PSK233 (continued) i min 0 i i min 240 if i5 = 3, delay befe the multipurpose input alarm is activated if i5 = 4, compress delay after the deactivation of the multipurpose input number of multipurpose input alarms such as to provoke the controller locked alarm (only if i5 = 4) 0 = alarm not enabled time without multipurpose input alarms such as to provoke the alarm counter to be cleared (only if i5 = 4) Parameters Minimum Maximum U.M. DEF. Serial Netwk Only PSK223 PSK233 LA controller address Lb baud rate 0 = 2,400 baud 1 = 4,800 baud 2 = 9,600 baud 3 = 19,200 baud LP parity 0 = none 1 = odd 2 = even Parameters Minimum Maximum U.M. DEF. Reserved E reserved

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8 WARNING USER RESPONSIBILITY Failure improper selection improper use of the products described herein related items can cause death, personal injury property damage. This document other infmation from Parker Hannifin Cpation, its subsidiaries authized distributs provide product system options f further investigation by users having technical expertise. The user, through its own analysis testing, is solely responsible f making the final selection of the system components assuring that all perfmance, endurance, maintenance, safety warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry stards, follow the infmation concerning the product in the current product catalog in any other materials provided from Parker its subsidiaries authized distributs. To the extent that Parker its subsidiaries authized distributs provide component system options based upon data specifications provided by the user, the user is responsible f determining that such data specifications are suitable sufficient f all applications reasonably feseeable uses of the components systems. F safety infmation see the Safety Guide at call CParker Parker Hannifin Cpation. Bulletin / Parker Hannifin Cpation Splan Division 206 Lange Drive, Washington, MO USA phone fax