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Service Manual

1. 29 30 Refrigerant Charging 30 31 Undercharged Refrigerant Systems 31 32 Overcharged Refrigerant Systems 32 Restricted Refrigerant System 33 RoutineMaintenance 34 Troubleshooting 34 45 Wiring Diagrams RS eg ala da ale 46 lem 47 dog eL 48 49 50 YQ 51 52 EINE 53 pj 54 eatae 55 56 519 dd 57 NSO 58 59 DU M 60 MEN aa daa agan Baga an RE 61 WY a ai aana ng 62 Unit Components Fresh Air o Compressor Capillary Tube Liquid Filter Driers Reversing Valve some models Condenser Coil Front Cover Discharge Air Li AN System Switches Evaporator Coil J SF N sieeve Return Air Grille Filter Blower Wheel Blower Motor Condenser Fan Blade Introduction This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component This service manual was written to assist the professional RAC service technician to quickly and accurately diagnose and repair malfunctions This manual will deal with subjects in a general nature i e all text will not pertai
2. A 5 Hi Heat Position between terminals C and 1 and and 4 ROTARY SYSTEM SWITCH SC Model See Figure 16 A rotary four position switch is used to turn on the unit and select the operation desired Switch selection is as follows Figure 15 System Control Switch YQ Model Only Figure 16 System Control Panel SC Model Only 1 Hi Cool Turns on the compressor and fan at high speed 2 LoCoo Turns on the compressor and fan at low speed 3 FanOnly Turns on the fan at high speed 4 Off Turns everything off The switching arrangement of the control is as follows See Figure 17 Off All contacts open Hi Fan Contacts closed between terminals L1 and 1 Hi Cool Contacts closed between terminals L1 to 1 and L1 and C 4 Lo Cool Contacts are closed between terminals L1 to 2 and L1 to C Figure 16 System Control Switch SC Model Only 1 Disconnect leads from control switch 2 Check continuity between all switch positions shown in Figure 17 SYSTEM CONTROL PANEL WS Models See Figure 18 A five position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel Figure 18 System Control Panel WS M
3. INNERWALL MOTORMOUNT LEGEND SWITCH POSITION CIRCUIT ANTICIPATOR RESISTOR HEATER 891011 11 1 MONEY SAVER ROCKER SWITCH HEATER LIMIT CAPACITOR THERMAL FUSE COMPRESSOR NM GROUND LEAD OVERLOAD PROTECTOR COMBINATION TERMINAL MEDIUM HEAT o okadodx xox SYSTEM SWITCH PLASTICINSULATOR LowHeaT opdxdxo xo x INDOOR THERMOSTAT PART NO REV FANONLY xboodopobd 111 619 405 02 00 56 MODELS YS12J33 A YM18J34B A YL24J35C A THERMOSTAT DEFROST THERMOSTAT BLACK ORANGE BLACK WIRING DIAGRAM ORIENTATION MAY VARY REFER MARKINGS ON COMPRESSOR PROTECTOR 2 lt SMOOTH CONDUCTOR OR BROWN BLUE BLACKOR WH ANTICIPATOR RESISTOR GB ROCKER SWITCH db N RIBBED CONDUCTOR OR BLUE t TO CAPACITOR T TO CAPACITOR BRACKET iy RED RED BLUE BROWN CAPACITOR EE 11 14 GREEN YELLOW GREEN OR TO INNERWALL MOTORMOUNT MTR 6 49 COMPR 9 9 9 a9 SWITCH LOGIC LEGEND SWITCH POSITION 123455789 OFF LOWCOOL MEDIUM COOL HIGH HEAT MEDIUM HEAT LOWHEAT okolodx
4. 54 MODELS KS10E10 A KS10J10 B KS12E10 A KS12J10B A KS15J10 A KS12J30B A KS18J30 A KM20J30 A KM24J30 A COMPRESSOR BLACK ALTERNATE _ COMPRESSOR PROTECTOR HARNESS COMPRESSOR MOLDED ANTICIPATOR RESISTOR BLACK OR WHITE COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER 1 TOMARKING ON COMPRESSOR WIRING DIAGRAM SUPPLY CORD TO CAPACITOR BRACKET GREEN OR GREEN YELLOW TOINNERWALL MOTORMOUNT SMOOTH CONDUCTOR TO CAPACITOR BRACKET 2 8 8 8 SWITCH LOGIC LEGEND SWITCH POSITION OFF LOW COOL MED COOL HI COOL ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR SYSTEM SWITCH INDOOR THERMOSTAT GROUND LEAD COMBINATION TERMINAL PLASTICINSULATOR PART NO 619 405 01 55 MODELS ES12J33B A ES16J33A A EM18J34B A EL25J35 A EL35J35 B EK18J34A WIRING DIAGRAM COMPRESSOR ERMINAL ORIENTATION MAY VARY REFERTO MARKINGS ON COMPRESSOR BLACK OR WHITE 1 ANTICIPATOR RESISTOR SMOOTH CONDUCTOR D CONDUCTOR GREEN CAPACITOR TO CAPACITOR BRACKET CAPACITOR BRACKET TO CHASSIS GREEN OR GREEN YELLOW
5. Device Refrigerant Drier _ Refrigerant Liquid Dryer Line Electrical Rating Tables Circuit Rating Model Breaker or T D Fuse Plug Face NEMAZ Appearance Facing Blades ALL SV and XQ MODELS KS10J10 KS12J10B KS15J10 RS10J10 RS12J10A RS15J10 5508 10 SSO9JLOC SS10J10AR 5512 0 SS14J10R SCO6H10D EQ08J11 YQ06J10B YSO9J10B 125V 15A KS12J30B KM18J30C RS16J30A RM18J30A SS12J30D 88161303 SM18J30BR 250V 15A KM20J30 KM24J30 SM20130 5125130 SL28J30B ES12J33B ES16J33A YS12J33 250V 20A SL35J30 EM18J34B EL25J35 EL35J35 YM18J34B YL24J35C Optional 30 Amp Kit 618 869 00 is recommended in 208 Volt power supply areas that fall below 208 Volts For more information call the Friedrich Service Department Due to a program of continuing improvement specifications are subject to change without notice Installation Notes Supply Cord All with right angle plug 6 on 115V 5 on 230 208V Room air conditioners include accessories for window or thru the wall installation TWINTEMP models include accessories for thru the wall installation only Window mounting requires use of optional accessory kit as listed below MODEL EQ08J11 YQ06J10B 512133 ES16J33A 509 10 YS12J33 EM18J34B YM18J34B EL25J35 EL35J35 124135 Wire Size Use ONLY wiring size recommended for single outlet branch c
6. O D PTCR OPTIONAL COMPRESSOR RIBBED CONDUCTOR PART NO OPTIONAL FACTORY WRING PTCR START ASSIST DEVICE 619 046 01 MODELS KQ08J10B 1 KQ08J10B A KQ08J10C A WIRING DIAGRAM RE HARNESS PTCR 77 CAPACITOR FAN MOTOR OPTIONAL CONFIGURATION SYSTEM SWITCH DETAIL A OPTIONAL WIRING YW RU SYSTEM SWITCH SEQUENCE b 2 CWROT CONNECTION 2 T BLKOR 1 ALL OPEN THERMOSTAT ow L1 H DETAIL B OPTIONAL SCHEMATIC LLL 1 16 5 L1 HL1 C J FAN MOTOR PTCR OPTIONAL L DPQ COMPRESSOR PTCR START ASSIST DEVICE 49 MODELS XQ05J10 B XQ06J10 A XQ06J10 B XQ08J10 1 XQ08J10 A XQ08J10A A ELECTRONIC CONTROL WI RI NG DI AGRAM COMPRESSOR ORIENTATION MAY VARY REFERTO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR SUPPLY CORD SMOOTH CONDUCTOR CAPACITOR TO CAPACITOR BRACKET RED RIBBED CONDUCTOR BLUE TO CAPACITOR BRACKET GREEN OR GREEN YELLOW INNERWALL MOTORMOUNT SCHEMATIC me L1 115V FAN SWTCHLOGIC LEGEND SWITCH POSITION CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR GROUND LEAD P
7. 5128 308 28000 27700 230 208 130 142 2947 2916 95 95 87 650 9135 30 35000 34800 230 208 180200 4070 4047 8 6 8 6 110 775 TWINTEMP Heat Pump Q06 10B 6400 5000 115 53 658 58 641 97 18 135 YSO9J10B 9200 7400 115 73 800 66 718 115 17 300 YS12J33 12400 12200 11300 11000 230 208 5 2 5 6 1181 1140 52 55 1177 1122 10 5 10 7 35 325 YM18J34B 18000 18000 17600 17600 230 208 91 100 2000 2000 89 98 1958 1958 90 90 52 495 YL24135C 24000 24000 23000 23000 230 208 10 9 12 0 2400 2400 110 121 2021 2421 10 0 10 0 6 0 600 TWINTEMP Electric Heat 008 1 8250 4000 115 15 842 112 1290 98 21 160 ES12J33B 12000 11800 10700 8900 230 208 5 0 5 2 1091 1026 160 147 3500 2900 110 115 28 300 ES16 33A 16300 16000 10700 8900 230 208 75 80 1663 1634 160 147 3500 2900 9 8 9 8 50 330 EM18 18300 17800 EL25J35 24600 24400 13000 10600 17300 14300 230 208 230 208 8 6 9 2 11 5 12 6 1892 1828 2536 2515 19 5 17 0 240 224 4200 3500 5500 4650 97 97 53 500 EL35 35 35000 34800 17300 14300 230 208 18 0 20 0 4070 4047 240 224 5500 4650 SLIDER CASEMENT SV08A10 8000 115 H 840 SV10A10 10000 115 9 6 SVI2A10 12000 115 115 CASEMENT 5 06 100 6200 Height Width Depth
8. COMPRESSOR SUPPLY CORD SMOOTH CONDUCTOR TOCAPACITOR BRACKET RIBBED CONDUCTOR TO CAPACITOR BRACKET GREEN OR GREEN YELLOW TO INNERWALL MOTORMOUNT CHASSIS SCHEMATIC L2 230 208 L1 SWITCH LOGIC LEGEND 12345 COMPRESSOR FANMOTOR OVERLOAD PROTECTOR GROUND LEAD 9 COMBINATION TERMINAL 53 MODELS SL28J30B A SL35J30 A SL35J30 B COMPRESSOR COMPRESSORTERMINAL WIRING DIAGRAM ORIENTATION MAY VARY REFER 1 TO MARKING ON COMPRESSOR BLACK ALTERNATE COMPRESSOR PROTECTOR HARNESS COMPRESSOR MOLDED ANTICIPATOR RESISTOR BLACK OR WHITE BLACK THERMOSTAT ORANGE BLUE BLACK SMOOTH CONDUCTOR SUPPLY CORD TO CAPACITOR BRACKET g 5__ GREENOR GREEN YELLOW TO CAPACITOR BRACKET TOINNERWALL MOTORMOUNT x 2 8 m a a SCHEMATIC SWITCH LOGIC LEGEND AR ANTICIPATOR RESISTOR SWITCH POSITION MS MONEY SAVER ROCKER SMTCH CAP CAPACITOR om COMPR COMPRESSOR i GROUND LEAD MTR MOTOR e COMBINATION TERMINAL LOW COOL OVERLOADPROTECTOR PLASTICINSULATOR MED COOL SYSTEM SWITCH HI COOL INDOOR THERMOSTAT PART NO FAN ONLY 619 405 01
9. 70 Inside 35 F Outside 3500 2900 5500 4650 5500 4650 Suction Head PSIG 70 Inside 47 F Outside 53 5 222 52 5 251 53 225 54 236 5 Do not operate below 37 ambient Heating element comes on at 35 F outside ambient and compressor shuts off PERFORMANCE DATA Heating BTUH 70 F Inside 62 F Outside 70 F Inside 57 F Outside 70 F Inside 52 F Outside 70 Inside 47 F Outside 70 Inside 42 F Outside 70 F Inside 37 F Outside 70 F Inside 35 F Outside Evaporator Air Temperature Rise 70 F Inside 62 F Outside 70 F Inside 57 F Outside 70 F Inside 52 F Outside 70 Inside 47 F Outside 70 Inside 42 F Outside 70 F Inside 37 F Outside 70 F Inside 35 F Outside 70 F Inside 62 F Outside 70 F Inside 57 F Outside 70 F Inside 52 F Outside 70 Inside 47 F Outside 70 Inside 42 F Outside 70 F Inside 37 F Outside 70 F Inside 35 F Outside Waits 70 Inside 62 F Outside 70 F Inside 57 F Outside 70 F Inside 52 F Outside 70 Inside 47 F Outside 70 Inside 42 F Outside 70 F Inside 37 F Outside 70 F Inside 35 F Outside Suction Head PSIG 70 F Inside 62 F Outside 70 F Inside 57 F Outside 70 F Inside 52 F Outside 70 Inside 47 F Outside 70 Inside 42 F Outside 70 F Inside 37 F Outside 70 F Inside 35 F Outside AHAM Rating Conditions WYO9A33F A 9700 30 75 27 10 26 80 36 40 30 10 e ee ue proc ee 7 66
10. FAN ONLY MS CAP COMPR MTR OMD ANTICIPATOR RESISTOR MONEY SAVER CAPACITOR COMPRESSOR FANMOTOR OVERLOAD REVERSING VALVE INDOORTHERMOSTAT OUTDOORTHERMOSTAT HIR HEATER HL HEATER UMIT THERMAL FUSE GROUND LEAD 2 3 O PLASTICINSULATOR COMBINATION TERMINAL PART NO REV 619 405 04 01 57 MODEL YS09J10B A WIRING DIAGRAM TERMINAL ORIENTATION MAY VARY REFERTO MARKINGS ON THERMOSTAT COMPRESSOR 1 1 COMPRESSOR COMPRESSOR DEFROST THERMOSTAT 1 1 12 PINK BLUE BLACK OR WHITE ROCKER SWITCH ANTICIPATOR RESISTOR SMOOTH CONDUCTOR OR BROWN RED RIBBED CONDUCTOR OR BLUE d TO CAPACITOR gt BRACKET CAPACITOR TO CAPACITOR SCHEMATIC L1 TO INNERWALL MOTOR MOUNT 4 pHa SWITCH LOGIC LEGEND SWITCH POSITION ANTICIPATOR RESISTOR MONEY SAVER CAPACITOR COMPRESSOR MEDIUM COOL MOTOR 4 GROUNDLEAD HIGH COOL OVERLOAD PROTECTOR e COMBINATION TERMINAL HIGH HEAT 4 MEDIUM FERT REVERSING VALVE O PLASTICINSUEATOR LOW HEAT INDOOR THERMOSTAT PART NO REV FAN ONLY OUTDOOR THERMOSTAT 619 142 17 58 MO
11. 1 MALFUNCTION OF VALVE No voltage to coil Repair electrical circuit E Defective coil Replace coil Valve will Low charge Repair leak recharge system not shift Pressure differential too high Recheck system from cool to Pilot valve okay Dirt in one Deenergize solenoid raise head pressure bleeder hole reenergize solenoid to break dirt loose If heat unsuccessful remove valve wash out Check on air before installing If no movement replace valve add strainer to discharge tube mount valve horizontally Piston cup leak Stop unit After pressures equalize restart with solenoid energized If valve shifts reattempt with compressor running If still no shift replace valve 4 lt UJ Check Electrical circuit and coil Check refrigeration charge Clogged pilot tubes Raise head pressure operate solenoid to free If still no shift replace valve Valve will Both ports of pilot open Back seat Raise head pressure operate solenoid to free not shift port did not close partially clogged port If still no shift replace from cool to valve heat Defective Compressor Replace compressor Not enough pressure differential at Check unit for correct operating pressures and start of stroke or not enough flow to charge Raise head pressure If no shift use maintain pressure differential valve with smaller port Starts to Body damage Replace valve hift but Both ports of pilot open Raise
12. with Front 115 67 Minimum Extension Outside Minimum Extension Into Room Depth Hood to Louvers DIMENSIDNS Window Width Minimum Maximum Thru the wall Finished Hole Height Width 14 19 3 4 21 3 8 8 1 2 51 2 10 3 4 26 42 14 3 4 20 15 15 16 25 15 16 27 3 8 83 4 31 16 16 15 16 27 7 8 42 163 16 __ 263 16 17 15 16 25 15 16 27 3 8 8 3 4 31 16 16 15 16 27 7 8 42 183 16 263 16 20 3 16 28 33 5 8 16 1 2 33 16 18 15 16 29 78 178 20 3 8 28 1 4 10 13 16 14 11 16 27 9 7 8 21 2 15 1 2 14 3 4 17 7 8 118 1415 16 20 1 2 As an ENERGY STAR partner Friedrich Air Conditioning Co has determined that the selected ENERGY STAR Ar models meet the ENERGY STAR guidelines for energy efficiency 14 1 2 23 11 51 4 17 3 4 15 SV fits windows minimum of 21 H and a maximum of 40 1 2 H 1 2 CHANGE FOR THE BETTER WITH ENERGY STAR Sleeve dimensions listed on following page The 006 and 1509 models operate on 115 volts and are not equipped with supplemental heat Both models will not provide heat at temperatures below 40 F Friedrich room air conditioners are designed to operate in outdoor temperatures from 50 F to 115 F EQ PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELEC
13. 279 99 48 48 301 150 7 0 5408 e Rating Conditions 80 degree F Room Air Temperature and 5096 Relative Humidity with 95 degree F Outside Air Temperature at 40 Relative Humidity 19 19 s 57 23 2352 7 7 7 6 5 5 55 PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL 22 BREAKER Air Drop F Rotar Amp OZ Amps SOBJORA S09J10C A STANOARE 572 226 27 98 300 165 514 5128054 S16B0AA 569 23 77 56 7580 2 3990 20 E STOJDARA 23 STABORA EE j aj kir 75 SM SL PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL BREAKER DATA TEMP DEG F PRESSURES RATINGS REFRIG FUSE Cooling Discharge Temp Suction Discharge Amps Locked Charge 60 Hertz Air Rotar Amp 07 Amps 99 54 20 5 24 30 5486 2514 68 122 68 54 20 5 25 00 5232 2768 75 284 115125 68 485 20 5 55 0 5299 2707 72 37 180900 92 6 30 35008 s293 2707 72 180200 98 60 3 a a a o pee Rating Conditions 80 degree F Room Air Temperature and 5096 Relative Humidity with 95 degree F Outside Air Temperature at 40 Relative Humidity WS PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL R 22 BREAKER i Discharge Tem Suction Discharge Amps Locked Charge ir in 60 Hertz LEN WS0
14. 5 RSiBBoA s 2 72 26 87 48 15 RM243oA 57 2365 68 30 122 44 5 5 e 5 PERFORMANCE PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL R 22 BREAKER Cooling Discharge Suction Discharge Amps Locked harga in 60 Hertz pea per d U OZ 08108 se 2 39 28 77 392 25 15 WSI2J33A 56 24 80 264 5256 3 28 20 53 YM18J34B A 53 27 74 24 8792 42 54 3 S Sh Mere E K C CH SE p Rating Conditions 80 degree F Room Air Temperature and 5096 Relative Humidity with 95 degree F Outside Air Temperature at 4096 Relative Humidity PERFORMANCE EVAPORATOR OPERATING ELECTRICAL 22 BREAKER i Discharge Temp Suction Amps Locked Chargein 60 Hertz pea por OZ NE ANE DA m s rai OE m mim s meo eo e pum Lu 24224 o 249224 Ew 05 05 83 6 2 5 35358 29 KS KM PERFORMANCE DATA DATA F OPERATING ELECTRICAL 22 Temp Amps Locked Charge in 60 Herts S 483 2606 15 2689 483 2688 15 268 108 540 25 15 1 29 i20 670 298 15 285 62 260 3008 15 299 87 48 4 15
15. S AR and p 4 Hi Cool Position between terminals C and 3 C2 and 2 and M S AR and 5 5 Heat Position between terminals 1 C2 4 M S AR and 5 19 6 Med Heat Position between terminals C and 1 62 and 4 M S AR and 7 Lo Cool Position between terminals C and 1 C2 and 4 LO and M S AR and 5 8 Fan Only Position between terminals L1 M Figure 21 System Control Switch CAR H M 062 Heat Pump Electric Heat WE amp WY Models 5 L1 mis 4121 SYSTEM CONTROL SWITCH KS 55 SM SL Models See Figure 22 A five position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel Figure 22 System Control Panel KS SS KM SM SL QUIETMASTER C 1 Warmer Cooler Wait three minutes before restarting 20 SYSTEM CONTROL SWITCH TEST See Figure 23 Disconnect leads from control switch There must be continuity as follows 1 Off Position no continuity between terminals 2 Lo Cool Position between terminals L1 and C LO and MS 3 Med Coo Position between terminals L1
16. and G M and MS 4 Hi Cool Position between terminals L1 and C H and MS 5 Fan Only Position between terminals L1 and 2 Figure 23 System Control Switch SYSTEM CONTROL PANEL See Figure 24 A six position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel Figure 24 System Control Panel Deluxe Series RS amp RM QUIET MAS T ER DELUXE Sleep v Setting ue 91 Cool Med Cool Warmer Cooler Wait three minutes before restarting SYSTEM CONTROL SWITCH TEST Disconnect leads from control switch See Figure 25 There must be continuity as follows Figure 25 POSITION OFF LL COOL LO COOL MED COOL HI COOL FAN SYSTEM CONTROL SWITCH See Figure 26 Heat Pump amp Electric Heat Models An eight position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed in the cooling or heating mode The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel 1 Position everything is off 2 Lo Cool Position f
17. condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The RAC design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a liquid before leaving the condenser coil The refrigerant leaves the condenser coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the drier to trap any moisture present in the system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower
18. evaporator coil clean PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat differential too narrow Replace thermostat Plenum gasket not sealing allowing Check gasket Reposition or replace Thermostat short discharge air to short cycle thermostat cycles Restricted coll or dirty filter and advise customer of periodic cleaning filter thermostat bulb Applicable models Thermostat bulb touching thermostat Adjust bulb bracket bulb support bracket Applicable models PROBLEM POSSIBLE CAUSE TO CORRECT Anticipator resistor wire disconnected Refer to appropriate wiring diagram at thermostat or system switch Anticipator resister shorted or open Disconnect plug from outlet Remove resistor from Applicable models bracket Insert plug and depress Cool and Fan Auto MoneySaver buttons Place thermostat to warmest setting Feel resistor for temperature If no heat replace resistor Partial loss of charge in thermostat Replace thermostat bulb causing a wide differential Prolonged off cycles automatic operation PROBLEM POSSIBLE CAUSE TO CORRECT Switches from Thermostat sticking Change room thermostat cooling to heating Incorrect wiring Refer to appropriate wiring diagram 38 PROBLEM POSSIBLE CAUSE TO CORRECT Evaporator drain pan cracked or Repair clean or replace as required obstructed Outside water leaks Water in compressor area Detach shroud
19. fan will start then stop after approximately 2 minutes then the fan and compressor will start together approximately 2 minutes later Figure 5 Fan Motor SYSTEM CONTROL PANEL SQ Models See Figure 6 A five position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on the decorative control panel Figure 6 System Control Panel SQ Models Only ASTAR Super High Efficiency Wait three minutes before restarting 15 SYSTEM CONTROL SWITCH TEST See Figure 7 Disconnect the leads from the control switch There must be continuity as follows 1 Off Position no continuity between terminals 2 Lo Cool Position between terminals L1 and C Lo and MS 3 Med Cool Position between terminals L1 and C M and MS 4 Hi Cool Position between terminals L1 and C H and MS 5 Fan Only Position between terminals L1 and 2 RESISTOR Heat Anticipator SQ Only Failure of the resistor will cause prolonged off and on cycles of the unit When replacing a resistor be sure and use the exact replacement Resistor rating 115 Volts 12500 ohm 1 05 watts Figure 7 System Switch SQ Only MONEYSAVER SWITCH Rocker Sw
20. is timed out All settings revert to the factory default settings of Cool 75 degrees F Timer and Set Hour features are nonfunctional Test Mode overrides the three minute lockout all delays for compressor and fan motor start speed change and no delay when switching modes Test Mode default settings are ON Money Saver 60 degrees F and High fan speed Activating Error Code Mode Submode of Test Mode Unit has to be in Test Mode to enter Error 2 Code Mode Activate Error Code Mode by pressing the TIMER ON OFF button on XQ models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the TEMP HR button will display 00 Consecutive presses will scroll through all error codes logged Press the TEMP HR button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear Activate Error Code Mode by pressing at the same time the A C START button and the ON OFF button on QME models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the WARMER button will display 00 Consecutive presses will scroll through all error codes logged Press the COOLER button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear IMPORTANT Error Codes are cleared from the log by exiting from Error Code Mode To exit on X
21. key button except for the On Off button The indoor temperature be viewed in all modes including test mode Filter Alert The Filter Alert indicator turns on after the fan motor has been operating for 250 hours The Filter Alert indicator is reset by pressing the Filter Alert button one time only Power failures will not reset the 250 hour timer All time elapsed is stored in memory and resumes counting after power is restored Keep Alive The electronic control has a memory to retain all functions and status as set up by the user in the event of a power failure Once power is restored to the unit there is a two second delay before the fan comes on and approximately three minutes delay before the compressor is activated providing that the mode was set for cooling and the set point temperature has not been met in the room THERMOSTAT SQ amp Models See Figure 30 Thermostat is used to cycle the compressor on and off at the comfort level desired The thermostat has a range from 60 2 F to 90 549 with a differential of 5 F Turning the knob clockwise lowers the indoor room temperature setting while turning the knob counter clockwise raises the indoor temperature TEST Remove wires turn thermostat to its coldest position Check for continuity between the two terminals Turn thermostat to warmest position check continuity to see if contacts open NOTE Temperature must be in range listed to check thermostat
22. left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealed system Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations 3 Install a process tube to sealed system 4 Make necessary repairs to system 5 Evacuate system to 250 300 microns or less 6 Weigh in refrigerant with the property quantity of R 22 refrigerant 7 Start unit and verify performance 8 Crimp the process tube and solder the end shut NOTE In order to access the sealed system it will be necessary to install Schrader type fittings to the process tubes on the discharge and suction of the compressor Proper recovery refrigerant procedures need to be adhered to as outlined in EPA Regulations THIS SHOULD ONLY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL Undercharged Refrigerant Systems An undercharged system will result in poor performance low pressures etc in both the heating and cooling cycle Whenever you service a unit with an undercharge of refrigerant always suspect a leak The leak must be repaired before charging the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator a
23. only slightly PROBLEM Undersized unit Refer to Sizing Charts Thermostat open or inoperative Set to coldest position Test thermostat and replace if necessary Dirty filter Clean as recommended in Owner s Manual Dirty or plugged condenser or evaporator coil Use steam or detergents to clean Poor air circulation in area being cooled Adjust discharge air louvers Use high fan speed Fresh air or exhaust air door open on applicable models Close doors Instruct customer on use of this feature Low capacity undercharge Check for leak and make repair Compressor not pumping properly Check amperage draw against nameplate If not conclusive make pressure test TO CORRECT 36 Unit does not run Fuse blown or circuit tripped Power cord not plugged in System switch in Off Inoperative system switch Loose or disconnected wiring at switch or other components Replace fuse reset breaker If repeats check fuse or breaker size Check for shorts in unit wiring and components Test for continuity in each switch position Check wiring and connections Reconnect per wiring diagram Dirty filter Clean recommended in 5 Manual Restricted air flow Check for dirty or obstructed coil clean as re freezes up Test for shorted thermostat or stuck contacts Short of refrigerant Partially restricted capillary De ice coi
24. pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving Indoor air across the finned surface of the evaporator coil the expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporated changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The particular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated ran TIN Suction x Discharge Line j mj Line Evaporator Coil Condenser TA r Coil Compressor Metering
25. the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection SOLENOID COIL Heat Pump Models Only See Figure 42 The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Should the reversing valve fail to shift during the heating cycle test the solenoid coil TO TEST 1 Disconnect power to unit 2 Disconnect coil leads 3 Attach probes of an ohmmeter to each coil lead and check for continuity NOTE Do not start unit with solenoid coil removed from valve or do not remove coil after unit is in operation This will cause the coil to burn out Figure 43 Bellows Assembly Drain Pan Valve VALVE DRAIN PAN See Figure 43 During the cooling mode of operation condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil This assists in cooling the refrigerant plus evaporating the water During the heating mode of operation it is necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside tem
26. 315 WY12A33F A 10800 10400 10000 9000 11000 9100 37 60 32 70 31 50 27 30 33 30 27 60 16 0 14 7 1175 1155 1070 3550 2950 61 325 59 290 53 275 49 255 45 240 41 220 44 200 40 215 Heating Element comes on at 35 F outside ambient and compressor shuts off 11 Refrigeration System Seguence of Operation Agood understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity Temperature The refrigerant leaves the compressor through the discharge line as ahot high pressure gas vapor The refrigerant enters the
27. 7A10E C WS07A10E D 58 NI NN 55 Er WE WY PERFORMANCE DATA Discharge Temp Suction Discharge Amps Locked Charge ir in 60 Hertz 86 302 47 Lm 9 6 471 329 n 30 85 435 20 L T T T TT T PERFORMANCE DATA WE15A33 A Rating Conditions 80 degree F Room Air Temperature and 50 Relative Humidity 95 degree F Outside Air Temperature at 40 Relative Humidity PERFORMANCE DATA DISCHARGE 56 1 OPERATING SUCTION EER oo ee Des f e 80 F Room Air Temperature and 50 Relative Humidity with 95 F Outside Air Temperature at 40 Relative Humidity shipping weg PERFORMANCE DATA YS09J10B A YS12J33 A_ YM18J34A A_ YL24J35C A Heating 70 Inside 47 F Outside 8300 12400 12300 17200 17200 23000 22800 70 F Inside 35 F Outside 10700 8900 13000 10600 17300 14300 Evaporator Air Temperature Rise 70 F Inside 47 F Outside 31 38 24 74 31 71 PRESSURES DISCHARGE ELECTRICAL RATINGS LOCKED ROTORAMPS R 22 CHARGE IN 14 CHARGE IN FLUID OZ 70 Inside 35 F Outside 28 69 23 87 24 46 20 22 24 38 20 16 AMPS 70 Inside 47 F Outside 6 7 6 0 6 5 8 5 9 0 10 4 11 5 70 Inside 35 F Outside 16 0 14 7 19 5 17 0 24 0 22 4 Watts 70 Inside 47 F Outside 760 1340 1300 1880 1820 2350 2340
28. 92 14 25 260 5512 11750 98 1068 10 35 325 5514 14000 120 1308 07 43 290 5512 12000 11800 230 208 5 0 5 2 1091 1026 119 115 28 300 5516 16300 16000 230 208 7 5 8 0 1663 1634 9 8 9 8 50 330 SM18J30BR 18300 17800 230 208 86 92 1892 1828 9 7 9 7 57 500 5 20130 20200 20000 230 208 95 99 2082 2000 9 7 10 0 o co o o 6 1 490 QUIETMASTER Deluxe 831010 10000 119 83 909 110 26 300 RSIZIIOA 11750 115 98 1068 110 35 325 851510 14500 115 120 1306 111 43 290 RS16J30A 16300 16000 230 208 75 80 1663 1634 9 8 9 8 50 330 RMI8J30A 18300 17800 230 208 8 6 9 2 1892 1828 97 97 57 500 RM24J30 23200 23000 230 208 111 122 2468 2447 94 94 10 590 QUIETMASTER 0 10000 115 9 1 97 103 28 325 0 11500 115 94 1065 108 25 360 0 14500 115 120 1330 109 43 290 30B 12000 12000 230 208 54 59 1200 1176 100 102 35 325 300 18000 17700 230 208 8 3 9 2 1865 1827 9 97 56 500 30 20200 20000 230 208 9 5 9 9 2082 2000 9 7 10 0 6 1 490 30 23200 23000 230 208 111 122 2468 2447 94 94 10 590 QUIETMASTER Heavy Duty 5125130 24600 24400 230 208 115 126 2536 2515 9 97 6 9 625
29. A33E B WE12A33E A 15 33 WIRING DIAGRAM COMPRESSOR COMPRESSOR SMOOTH CONDUCTOR RIBBED CONDUCTOR SWITCH LOGIC LEGEND SWITCH POSITION OFF LOW COOL MEDIUM COOL HIGH COOL HIGH HEAT MEDIUM HEAT LOW HEAT EAN ONLY ANTICIPATOR RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR SYSTEM SWITCH INDOOR THERMOSTAT HIR HL TF i O HEATER HEATERLIMIT THERMAL FUSE GROUND LEAD COMBINATION TERMINAL PLASTICINSULATOR PART NO 617 581 15 61 MODELS WY09A33F A WY12A33G A WIRING DIAGRAM FANMOTOR 5 CONDUCTOR SUPPLY CORD RIBBED CONDUCTOR BLUE ORANGE YELLOW SWTCHLOGIC SWITCH POSITION CIRCUIT 1 355789 OFF 4 obdxjodoxo MEDIUM COOL 111 kol Lobxoo1o HIGH HEAT DXoqxox MEDIUM HEAT BEER KOKOK 62 LEGEND MONEY SAVER CAPACITOR COMPRESSOR FANMOTOR OVERLOAD PROTEC
30. ART NO REV 619 142 14 03 e COMBINATION TERMINAL LOW COOL 50 MODEL YQ06J10B A HARNESS COMPR MOLDED RIBBED OR BLUE CONDUCTOR DEFROST CONTROL PTCR OPTIONAL CAPACITOR COMPRESSOR WIRING DIAGRAM FAN MOTOR SMOOTH OR BROWN CONDUCTOR SUPPLY CORD SCHEMATIC COMPRESSOR SWITCH LOGIC CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR SYSTEM SWITCH INDOOR THERMOSTAT START ASSIST DEVICE OPTIONAL FACTORY WIRING I GROUND LEAD COMBINATION TERMINAL PLASTICINSULATOR PART REV 617 581 11 00 51 52 MODEL SC06H10D CAPACITOR WHITE FAN MOTOR COMPRESSOR SCHEMATIC close contacts ALL L1 1 L1 2 L1 1 OPEN L1 C L1 C FAN MOTOR RUN CAPACITOR CAUTION FOLLOW WIRING DIAGRAM EXACTLY WHEN WIRING THE COMPRESSOR THE RUN AND START TERMINAL POSITIONS VARY FROM CONVENTIONAL PRACTICE SUPPLY CORD TO GROUND SCREW SYSTEM SWITCH SYSTEM SEITCH THERMOSTAT 2 OVERLOAD COMPRESSOR LINE 614 406 00 MODELS SS08J10R B SS08J10R A 5509 10 SS10J10AR A SS12J10AR B SS14J10R A SS12J30D A SS16J30A A SS18J30R A SM20J30 A SM24J30 A COMPRESSOR TERMINAL WIRING DIAGRAM COMPRESSOR ORIENTATION MAY VARY REFERTO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR
31. Cut the process tube below pinch off on the suction side of the compressor 3 Connect the line from the nitrogen tank to the suction process tube 4 Driftdry nitrogen through the system and un solder the more distant connection first Filter drier high side process tube etc 5 Replace inoperative component and always install a new filter drier Drift dry nitrogen through the system when making these connections 6 Pressurize system to 30 PSIG with proper refrigerant and boost refrigerant pressure to 150 PSIG with dry nitrogen 7 Leak test complete system with electric halogen leak detector correcting any leaks found 8 Reduce the system to zero gauge pressure 9 Connect vacuum pump to high side and low side of system with deep vacuum hoses or copper tubing Do not use regular hoses 10 Evacuate system to maximum absolute holding 30 pressure of 200 microns or less NOTE This process can be speeded up by use of heat lamps or by breaking the vacuum with refrigerant or dry nitrogen at 5 000 from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent to remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with processing as outlined under hermetic component replacement ROTARY COMPRESSOR SPECIAL TROUBLESH
32. DELS EQ08J11 A EQ08J11 B WIRING DIAGRAM COMPRESSOR CONDUCTOR HARNESS COMPR NOTE SMOOTH ORBROWN OPTIONAL CONFIGURATION THERMOSTAT SUPPLY CORD RIBBED CONDUCTOR CAPACITOR TO CAPACITOR BRACKET SCHEMATIC SWITCH LOGIC LEGEND HEATER LIMIT THERMAL FUSE CAPACITOR PRE INSULATED CONDUCTOR COMPRESSOR GROUND LEAD FAN FAN MOTOR e COMBINATION TERMINAL HI COOL OVERLOAD PROTECTOR PLASTICINSULATOR LOWCOOL SYSTEM SWITCH LOW HEAT INDOOR THERMOSTAT HI HEAT HEATER PART NO REV 617 581 12 01 SWITCH POSITION 59 MODELS 507 10 WS07A10E C WS10A10 A WS12A10E A COMPRESSOR WS09A30E B WS12A30E A 515 30 WIRING DIAGRAM THERMOSTAT BLACK PURPLE SMOOTHCONDUCTOR SCHEMATIC RED RIBBED CONDUCTOR NEUTRAL SWITCH LOGIC SWITCH POSITION 60 CAP LEGEND CAPACITOR COMPRESSOR Ji GROUNDLEAD FANMOTOR e COMBINATION TERMINAL OVERLOAD PROTECTOR PLASTICINSULATOR SYSTEM SWITCH SUPPLY CORD TO GROUNDING SCREW 115 V 108 230 V INDOOR THERMOSTAT PART NO 617 581 14 MODELS WE09
33. Figure 30 Thermostat THERMOSTAT YQ Model Only See Figure 31 This thermostat is single pole double throw cross ambient with a range of 60910 92 F and a differential of 2 F Terminal 2 is common 24 Figure 31 Thermostat YQ Models Only TEST 1 Remove leads from thermostat 2 Turn thermostat knob clockwise to its coldest position 3 Test for continuity between the two terminals Contacts should be closed 4 Turn thermostat knob counterclockwise to its warmest position 5 Test for continuity contacts should be open NOTE The thermostat must be within the temperature range listed to open and close To maintain the comfort level desired a cross ambient type thermostat is used The thermostat has a range from 65 2 F to 87 3 The thermostat bulb is positioned in front of the evaporator coil to sense the return air temperature Thermo stat malfunction or erratic operation is covered in the trouble shooting section of this manual TEST 1 Remove leads from thermostat 2 Turn thermostat knob clockwise to its coldest position 3 Test for continuity between the two terminals Contacts should be closed 4 Turn thermostat knob counterclockwise to its warmest position 5 Test for continuity contacts should be open NOTE The thermostat must be within the temperature range listed to open and close THERMOSTAT Models ES YS EM YM EL YL See Figure 32 A cross ambient
34. IRING DIAGRAM COMPRESSOR 4 HARNESS COMPR NOTE OPTIONAL CONFIGURATION ANTICIPATOR RESISTOR CONDUCTOR SUPPLY CORD CAPACITOR TO CAPACITOR TO INNERWALL MOTORMOUNT FAN MOTOR RIBBED CONDUCTOR SCHEMATIC SWITCH LOGIC LEGEND ANTICIPATOR RESISTOR SWITCH POSITION MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD OFF MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR PLASTIC INSULATOR SYSTEM SWITCH INDOOR THERMOSTAT PART NO 619 142 15 FAN ONLY 47 48 MODELS KQ05J10B B KQ05E10 C KQ06J10B A KQ06J10B B KQ06E10 A KQ06E10 B WIRING DIAGRAM CAPACITOR FAN MOTOR WHITE THERMOSTAT 2 D BLACK BLACK RIBBED OR BLUE CONDUCTOR 1 GREEN YELLOW SMOOTH OR BROWN CONDUCTOR SEE DETAIL A SYSTEM SWITCH SEQUENCE CW ROT CONNECTION OFF ALL OPEN DETAIL A OPTIONAL WIRING ap BK CONTROL BLK a BLK jue THERMOSTAT we T HI FAN L1 H LO FAN L1 L LO COOL L1 L L1 C HI COOL 11 11 SCHEMATIC DETAIL B OPTIONAL SCHEMATIC ANTI ICE CONTROL BLACK SEE DETAIL FAN MOTOR
35. LO 5 Hi Heat Position between terminals L2 and 2 and MS and 17 Figure 13 System Control Switch Models SYSTEM CONTROL PANEL YQ Model Only See Figure 14 The YQ Modelunit uses a six position control switch to regulate the operation of the unit Function of each position Clockwise rotation is as follows 1 Off Turns everything off 2 Fan Only To circulate filtered room air but no cooling or heating 3 Hi Cool Fan runs continuously compressor goes on and off to maintain the selected room temperature 4 Lo Cool Fan runs continuously compressor goes on and off to maintain the selected room temperature 5 Lo Heat Fan Runs continuously heating turns on and off to maintain the selected room temperature 6 Hi Heat Fan Runs continuously heating turns on and off to maintain the selected room temperature Figure 14 System Control Panel YQ Model Only TWINTEMP Warm 9 o Hi Heat Fan Only e Lo Heat val Hi Cool Lo Cool Cool SYSTEM CONTROL SWITCH TEST See Figure 15 Turn knob to phase of switch to be tested There must be continuity as follows 1 Fan Only Position between terminals C and 1 2 Hi Cool Position between terminals C and 1 and 3 3 Lo Cool Position between terminals C and 2 and a 4 Lo Heat Position between terminals C and 2 and
36. M POSSIBLE CAUSE TO CORRECT Defective thermostat Incorrect differential setting Replace thermostat emperature varies from Heat anticipator resistor shorted Check voltage to resistor If voltage okay remove comfortable to overly Applicable models resistor from thermostat bulb block With current on warm feel resistor for warmth If no heat can be felt replace anticipator PROBLEM POSSIBLE CAUSE TO CORRECT Heat anticipator resistor shorted Disconnect power to unit Remove resistor from Applicable models thermostat bulb block Plug in unit and allow to operate Feel resistor for heat If no heat is felt eplace resistor Wide differential partial loss of ther Replace thermostat and check mostat bulb charge Incorrect wiring Refer to appropriate wiring diagram Resistor is energized during the on cycle of compressor or fan Incorrect wiring Refer to appropriate wiring diagram Check for voltage at and 1 on timer If NUN ing voltage replace control Unit will not defrost Defrost control out of calibration If outside coil temperature is 25 F or below preselected time limit has elapsed replace the defrost control Defrost contro contacts stuck If the contacts remain closed between terminals 2 and 3 of the defrost control after preselected time interval has passed replace control Reinstall and assure that good bulb to coil contact is or not making go
37. OMPRESSORS Compressors are single phase 115 or 230 208 volt depending on the model unit All compressor motors are permanent split capacitor type using only a running capacitor across the start and run terminal All compressors are internally spring mounted and externally mounted on rubber isolators WINDING TEST Remove compressor terminal box cover and disconnect wires from terminals Using an ohmmeter check continuity across the following See Figure 1 1 Terminal and S no continuity open winding replace compressor 2 Terminal C R no continuity open winding replace compressor 3 Terminal R and S no continuity open winding replace compressor OHMMETER Figure 1 ROTARY COMPRESSOR TOP VIEW GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good con nection is a must and the other probe in turn to each com pressor terminal see Figure 2 If a reading is obtained the compressor is grounded and must be replaced OHMMETER Figure 2 Typical Ground Test ROTARY COMPRESSOR TOP VIEW CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or
38. OOTING AND SERVICE Basically troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with only a few exceptions 1 Because of the spinning motion of the rotary the mounts are critical If vibration is present check the mounts carefully 2 Theelectrical terminals on the rotary are in a different order than the reciprocating compressors The terminal markings are on the cover gasket Use your wiring diagram to insure correct connections REFRIGERANT CHARGING NOTE BECAUSE THE RAC SYSTEM IS A SEALED SYSTEM SERVICE PROCESS TUBES WILL HAVE TO BE INSTALLED FIRST INSTALL A LINE TAP AND REMOVE REFRIGERANT FROM SYSTEM MAKE NECESSARY SEALED SYSTEM REPAIRS AND VACUUM SYSTEM CRIMP PROCESS TUBE LINE AND SOLDER END SHUT DO NOT LEAVE A SERVICE VALVE IN THE SEALED SYSTEM Proper refrigerant charge is essential to proper unit operation Operating a unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evapo
39. Q models press Timer On Off button To exit QME models press A C Start and On Off buttons Or unplug unit to exit Error Code Mode Plug unit in after 5 seconds to resume normal operation of unit 63 Friedrich FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 fax 210 357 4480 www friedrich com Printed in the U S A RACServMn 7 03
40. Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Noncondensables air in Moisture in System Defective Compressor Defective Compressor System Electrical Troubleshooting Chart Heat Pump HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Is the Selector Switch Present at the Solenoid DEN Set for Heat 15 the Solenoid Coil Good Replace the Solenoid Coil YES Reversing Valve Stuck Replace the Reversing Valve 45 MODELS RS10J10C RS12J10A B RS15J10A RS16J30A A RS18J30A RM24J30 A COMPRESSOR TERMINAL WIRING DIAGRAM COMPRESSOR ORIENTATION MAY VARY REFERTO MARKINGS ON COMPRESSOR RED BLACK OVERLOAD ALTERNATE PROTECTOR COMPRESSOR COMPRESSOR WIRE HARNESS ANTICIPATOR RESISTOR BLACK ORWHITE SMOOTH CONDUCTOR TO CAPACITOR BRACKET SUPPLY CORD ORGREEN YELLOW TO INNERWALL MOTOR MOUNT ORGREEN YELLOW Z TO CAPACITOR BRACKET RIBBED CONDUCTOR CAP LEGEND RESISTOR MONEY SAVER ROCKER SWITCH CAPACITOR COMPRESSOR GROUND LEAD FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR PLASTICINSULATOR SYSTEM SWITCH INDOOR THERMOSTAT PART NO 619 405 00 46 MODELS S006J10B B SQ06J10B A SQ08J10C A SQ08J10D A W
41. Service Manual 2003 Room Air Conditioners RACServMn 7 03 Table of Content Unit Identification 3 Unit Specifications 4 Unit Performance 5 11 Refrigeration Sequence of Operation 12 Electrical Rating Tables 13 ced sa mlm 14 Thermal Overload External 14 Thermal Overload Internal 15 Fan Motor uuu amm alen a 15 System Switches Controls 15 24 Thermostats Indoor 24 25 Thermostats Defrost 25 26 Resistor Heat Anticipator 26 Capacitor RUN 26 ValV 27 Heat Pump Reversing Valve 27 Solenoid Coil Heat Pump Models 28 Valve Drain Pan 29 Heating Element 29 Sealed Refrigeration Repairs
42. Switch KQ Models Only SYSTEM CONTROL PANEL EQ Model Only See Figure 12 The EQ Model unit uses a six position control switch to regulate the operation of the unit Function of each position clockwise rotation is as follows 1 Off Turns everything off 2 Fan Only To circulate filtered room air but no cooling or heating 3 Hi Cool Fan runs continuously compressor goes on and off to maintain the selected room temperature 4 Lo Cool fan runs continuously compressor goes on and off to maintain the selected room temperature 5 Lo Heat Fan runs continuously heating turns on and off to maintain the selected room temperature 6 Hi Heat Fan runs continuously heating turns on and off to maintain the selected room temperature Figure 12 System Control Panel EQ Models only TWINTEMP e Warm e o Hi Heat Fan Only e Lo Heat Lo Cool Hi Cool Walt three minutes before restarting SYSTEM CONTROL SWITCH TEST See Figure 13 Turn knob to phase of switch to be tested There must be continuity as follows 1 Fan Only Position between terminals MS and H 2 Hi Cool Position between terminals 11 and and MS and H 3 Low Cool Position between terminals L1 and and MS and LO 4 Low Heat Position between terminals L2 and 2 and MS and
43. TOR REVERSING VALVE INDOOR THERMOSTAT OUTDOOR THERMOSTAT HEATER HEATER UMIT THERMAL FUSE GROUND LEAD COMBINATION TERMINAL PLASTICINSULATOR PART REV 617 581 02 03 Testing The Electronic Control 2001 KO Boards 8 Boards Checking Room Temperature 1 Check the room temperature at the electronic control pad by pressing at the same time the FAN SPEED button and the temperature UP button on XQ models Check the room temperature at the electronic control pad by pressing at the same time the SPEED button and the WARMER button on QME models The indoor temperature will display for 10 seconds Indoor temperature can be viewed in all modes including the TEST mode The display can be changed back to SET temperature by pressing any key except the ON OFF button or after 10 seconds has elapsed Activating Test Mode Activate test mode by pressing at the same time the MODE button and the temperature DOWN button on XQ models LEDs for Hour Start and Stop will blink 1 bps while Test Mode is active Activate test mode by pressing at the same time the MONEY SAVER button and the FILTER ALERT button on QME models LED for the Filter Alert will blink 1 bps while Test Mode is active Test Mode has duration of 90 minutes Test Mode can be activated under any conditions including Off Test Mode is cancelled by pressing the On Off button unplugging the unit or when the 90 minutes
44. TRICAL R 22 DATA TEMP DEG F PRESSURES RATINGS REFRIG Cooling Discharge Temp Suction Discharge Locked Charge 60 Hertz XQ PERFORMANCE DATA DATA Cooling p ns 35 B 5145 2855 82 5145 2855 79 Lem mne SG PERFORMANCE DATA EVAPORATOR AIR OPERATING ELECTRICAL R 22 BREAKER TEMP DEG F PRESSURES RATINGS REFRIG Discharge Temp Suction Discharge Locked Charge in Hertz Air Drop F 1 3 9 OZ BERN 349 160 Sans sras KQ YQ PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL R 22 BREAKER i Discharge Tea Suction Discharge Locked Charge 60 Hertz pe ape FN m 2866 1 2251 1 290 159 1 sa ance s2 150 5802 2198 80 269 58 350 190 15 22 00 Rating Conditions 80 degree F Room Air Temperature and 50 Relative Humidity with 95 degree F Outside Air Temperature and 40 Relative Humitidy RS RM PERFORMANCE DATA PERFORMANCE EVAPORATOR AIR OPERATING ELECTRICAL R 22 BREAKER Cooling Discharge Temp Suction Discharge Amps Locked Charge 60 Hertz nog Ame a 8 8 25 75 4 26 35 L 2 t s 23 7 Tr e 25 RSIGBOAA 565 24 77 29 72 4 30
45. an operates on low speed compressor is on 3 Med Cool Position fan operates on medium speed compressor is on 4 Hi Cool Position fan operates on high speed compressor is on 5 Hi Heat Position fan operates on high speed compressor or electric heater is on 6 Med Heat Position fan operates on medium speed compressor or electric heater is on Figure 26 System Control Switch SYSTEM CONTROL SWITCH Heat Pump amp Electric Heat Models See Figure 27 An eight position control switch is used to regulate the operation of the fan motor and compressor The compressor can be operated with the fan operating at low medium or high speed in the cooling or heating mode The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel 1 Off Position everything is off 2 Lo Coo Position fan operates on low speed compressor is on 3 Med Cool Position fan operates on medium speed compressor is on 4 Hi Cool Position fan operates on high speed compressor is on 5 Hi Heat Position fan operates on high speed compressor or electric heater is on 6 Med Heat Position fan operates on medium speed compressor or electric heater is on 7 Lo Heat Position fan operates on low speed compressor or electric heater is on 8 Fan Only Position operates on medium speed NOTE Heat pump models with electric hea
46. an relay NOTE Some models have the fan relay energized during the heating cycle while others do not Fan operates in Con stant position but not in Automatic Money Inoperative system switch Check continuity between terminals L2 and 3 of Saver the system switch Check connections on system switch and fan relay PROBLEM POSSIBLE CAUSE TO CORRECT Heat anticipator resistor shorted Disconnect power to unit Remove resistor from A he thermostat bulb block Plug in unit and allow to Long off and on operate Feel resistor for heat If no heat is felt cycles replace resisto f Defective thermostat Replace thermostat and check operation PROBLEM POSSIBLE CAUSE TO CORRECT Defective motor Check and replace Fan motor does not Open or shorted capacitor Replace capacitor and check operaie In Constant Check if drain pan valve is open If not replace 27 0086 connections heck all connections Check voltage to fan motor position PROBLEM POSSIBLE CAUSE TO CORRECT Heating capillary tube partially restricted Check for partially starved outer coil Replace heating capillary tube Cooling adequate Check valve leaking internally nd unit several times from to cooling heating insufficient ec temperature rise across coil Refer to specifi cation sheet for correct temperature rise Reversing valve failing to shift Deenergize solenoid coil raise head pressure completely bypassing hot
47. and High fan speed Activating Error Code Mode Submode of Test Mode Unit has to be in Test Mode to enter Error Code Mode 1 Activate Error Code Mode by pressing the TIMER ON OFF button on XQ models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the TEMP HR button will display 00 Consecutive presses will scroll through all error codes logged Press the TEMP HR button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear Activate Error Code Mode by pressing at the same time the A C START button and the ON OFF button on QME models LED for the TIMER ON OFF will flash 1 bps while Error Code Mode is active Pressing the WARMER button will display 00 Consecutive presses will scroll through all error codes logged Press the COOLER button to see the reverse order of all error codes logged When the end of logged error codes is reached the temperature set point will appear IMPORTANT Error Codes are cleared from the log by exiting from Error Code Mode To exit on XQ mod els press Timer On Off button To exit QME models press A C Start and On Off buttons Or unplug unit to exit Error Code Mode Plug unit in after 5 seconds to resume normal operation of unit TESTING THE ELECTRONIC CONTROL ERROR CODE LISTINGS E1 SHORT CYCLE SITUATION Defined as compressor powered on before the three min
48. e selected Smart Fan will also run to test temperature if the off cycle is long Figure 29 Electronic Control QUIETMAS T R AM PM c SetHour Filter Clock Alert i Mod E Cl Fan Temperature Cooler Warmer F Cl Fan Speed Smart 1 4 Fan e Timer Timer Stop Start On Off Smart Center Smart Center ELECTRONIC CONTROL SYSTEM SET HOUR CLOCK Touch SET HOUR CLOCK to see setting To change touch and hold until hour closest to the actual time appears in the display MAKE SURE A M AND P M ARE SET PROPERLY Minutes will NOT show on display TO SET THE TIMER NOTE SET HOUR CLOCK before attempting to set timer functions The TIMER ON OFF times can be set a minimum of one hour apart and a maximum of twenty three hours apart STOP TIME Touch A C STOP and hold until the hour the unit needs to shut off appears in the display A M or P M START TIME Touch A C START and hold until the hour the unit needs to come on appears in the display A M or P M Touch TIMER ON light on to activate the timer function Touch TIMER OFF light off to cancel the timer function desired Once the on and off times have been selected they will remain in memory and cycle daily until changed or until the unit is subject to a power interruption TESTING THE ELECTRONIC CONTROL 2003 XQ BOARDS amp QME BOARDS Checking Room Temperature 1 Check the room temperature at the electr
49. ean the unit air intake filter at least every 250 to 300 fan hours of operation or when the unit s indicator light is on if so equipped Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve NOTE Do not use a caustic coil cleaning agent on coils or base pan Use a biodegradable cleaning agent and degreaser Inspect the indoor blower housing evaporator blade condenser fan blade and condenser shroud periodically yearly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud Use warm or cold water when rinsing these items Allow all items to dry thoroughly before reinstalling them Periodically at least yearly or bi year
50. en unit is first turned on it will be in the COOL mode light on with constant fan Touch MONEYSAVER light on to activate the MoneySaver feature MoneySaver is a feature that cycles the fan with the compressor so that the fan does not run all the time This saves energy and improves dehumidification If customer prefers a constant fan for more air movement touch MONEYSAVER again and unit will return to constant fan Touch FAN ONLY light on and only the fan will run This feature may be used in conjunction with the FRESH EXHAUST lever to bring outside air into a room or to exhaust stale air 22 TO ADJUST TEMPERATURE COOLER Touch COOLER to see setting touch again to change WARMER Touch WARMER to see setting touch again to change Touch F C to show desired temperature in Fahrenheit or Celsius TO ADJUST FAN SPEED Touch SPEED to see current setting Touch again to change speed Fi is lowest setting sleep setting F2 is LOW F3 is MED and F4 is HIGH TO ACTIVATE SMART FAN Touch SMART FAN light on Smart Fan will adjust the fan speed automatically to maintain the desired comfort level For example if the outside doors in the home are open for an extended period of time or more people enter aroom Smart Fan may adjust to a higher fan speed to compensate for the increased heat load This keeps from having to adjust the fan speed on your own or from having to change the desired temperature you hav
51. erant flow within the system to permit heating or cooling The reversing valve consists of a main valve body which houses the slide and piston plus a pilot valve which is activated by a solenoid 27 There are three tubes connected to one side of the main valve body and one tube on the opposite side The single tube is connected to the compressor discharge line The center tube on the opposite side is the common suction line to the compressor The outside tubes are connected to the indoor and outdoor coils The pivot valve is responsible for directing the refrigerant flow to the indoor or outdoor coil There are three small tubes connected to the pilot valve body The center pilot tube is the common pilot tube and is connected to the center suction line The outside tubes are connected to each end of the main valve body The pilot valve consists of a needle valve and spring When the solenoid is de energized the spring tension closes one pilot port while the other remains open When the solenoid is energized the opposite end is closed The piston in the main valve is pressure operated and will always travel in the direction of the open pilot tube port which provides a path to the center tube Pressure which will increase in the opposite side of the valve will escape through a bleed port located in each piston When de energized the valve will be in the cooling position Figure 42 Reversing Valve TESTING REVERSING VALVE Occasio
52. ermostat testing THERMOSTAT ADJUSTMENT No attempt should be made to adjust thermostat Due to the sensitivity of the internal mechanism and the sophisticated equipment required to check the calibration it is suggested that the thermostat be replaced rather than calibrated Thermostat bulb must be straight to insure proper performance Figure 32 Thermostat THERMOSTAT BULB LOCATION The position of the bulb is important in order for the thermostat to function properly The bulb of the thermostat should be located approximately 45 to a maximum of 60 from horizontal Also do not allow the thermostat bulb to touch the evaporator coil See Figures 33 and 34 Figure 33 Thermostat Bulb Location 25 19 SQ Models NA A Thermostat sensor holder 020 and anticipator 4712D 140 to be positioned between the 4th and 5th and 6th and 7th rows of tubes from the bottom of the coil at dimension shown a Basepan top edge 7 500 3 Vo 1 500 Figure 34 Thermostat Bulb Location KQ YQ amp SC Models Only 7M SS 161 Thermostat sensor holder 020 to be positioned between the 4th and 5th and 6th and 7th rows of tubes from the bottom of the coil at dimension shown e 7 500 NY 500 top edge DEFROST THERMOSTAT Heat Pump Models Only See Figure 35 This thermostat is single pole double throw wi
53. f operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE See Figure 40 In the cooling mode of operation liquid refrigerant from con denser liquid line enters the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode Figure 40 TO INDOOR TO OUTDOOR COIL FRONT VIEW HEATING MODE see Figure 41 In the heating mode of operation liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils Note liquid refriger ant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode Figure 41 TO INDOOR COIL TO OUTDOOR COIL FRONT VIEW HEAT PUMPS REVERSING VALVE See Figure 42 A reversing valve is used to change the refrig
54. for flowing nitrogen through refrigeration tub ing during all brazing processes HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks Compressor condenser evaporator capillary tube refrigerant 11 12 microns Pressure system to 5 PSIG and leave in system a minimum of 10 minutes Release refrigerant and proceed with evacuation of a pressure of 200 microns or less Break vacuum by charging system from the high side with the correct amount of refrigerant specified This will prevent boiling the oil out of the crankcase NOTE If the entire charge will not enter the high side allow the remainder to enter the low side in small increments while operating the unit Restart unit several times after allowing pressures to stabilize Pinch off process tubes cut and solder the ends Remove pinch off tool and leak check the process tube ends SPECIAL PROCEDURE IN THE CASE OF COMPRESSOR MOTOR BURNOUT 1 2 Recover all refrigerant and oil from the system Remove compressor capillary tube and filter drier leaks etc 1 Recover the refrigerant from the system at the process tube located on the high side of the system by installing aline tap on the process tube Apply gauge from process tube to EPA approved gauges from process tube to EPA approved recovery system Recover CFC s in system to at least 596 2
55. from pan and coil Clean and remove old sealer Reseal reinstall and check Obstructed condenser coil Fan blade and slinger ring improperly Adjust fan blade to 1 2 clearance from condenser positioned coil PROBLEM POSSIBLE CAUSE TO CORRECT Insufficient air circulation in air condi Adjust louvers for best possible air circulation tioned area High indoor Oversized unit Operate in Fan Auto MoneySaver position humidity Inadequate vapor barrier in building Advise customer structure particularly floors 39 Troubleshooting Heating Heat pumps PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat setting Set thermostat to a warmer position No heating fan Defective thermostat Replace do not attempt to adjust operates Compressor not operating Check compressor wiring Check for open internal or external overload Check wiring Defective system switch Test system switch PROBLEM POSSIBLE CAUSE TO CORRECT Restricted filter Clean as recommended in Owner s Manual Outdoor thermostat Check if outdoor thermostat is energizing the heating Insufficient heating Applicable models element at its predetermined temperature setting Check control setting Fresh air or exhaust door open PROBLEM POSSIBLE CAUSE TO CORRECT Fan operates in Inoperative system switch Check continuity of switch constant position but not in automatic Incorrect wiring Check applicable wiring diagram MoneySaver PROBLE
56. gas energize solenoid to break loose If valve fails to make complete shift replace valve 43 PROBLEM POSSIBLE CAUSE TO CORRECT Compressor will not Outdoor thermostat Refer to the heating data on applicable models for turn off and operate on Applicable models the preselected temperature the compressor shuts heating element only off and the electric element is energized during low outside ambients Troubleshooting Chart Cooling REFRIGERANT SYSTEM DIAGNOSIS COOLING Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant System Reversing Valve not Reversing Valve not Overcharged Restriction Fully Seated Fully Seated Undercharged Overcharged Undercharged Noncondensables air in System Moisture in System Defective Compressor Defective Compressor 44 Troubleshooting Chart Heating REFRIGERANT SYSTEM DIAGNOSIS HEATING Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure Low Airflow Outdoor Ambient Too High Refrigerant System Outdoor Ambient High Across Outdoor Coil tor Cpsragorin baling Restriction For Operation In Heating Refrigerant System Reversing Valve not Reversing Valve not Low Airflow Across
57. he common motor terminal Should the internal temperature and or current draw become excessive the contacts in the overload will open turning off the compressor The overload will automatically reset but may require several hours before the heat is dissipated CHECKING THE INTERNAL OVERLOAD See Figure 4 Figure 4 Internal Overload LINE BREAK INTERNAL OVERLOAD OHMMETER 1 With no power to unit remove the leads from the com pressor terminals 2 Using an ohmmeter test continuity between terminals C S and If no continuity the compressor overload is open and the compressor must be replaced FAN MOTOR Asingle phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting over load is located inside the motor to protect against high tem perature and high amperage conditions See Figure 5 FAN MOTOR TEST 1 Determine that capacitor is serviceable 2 Disconnect fan motor wires from fan speed switch or System switch 3 Apply live test cord probes on black wire and common terminal of capacitor Motor should run at high speed 4 Apply live test cord probes on red wire and common terminal of capacitor Motor should run at low speed 5 Apply live test cord probes on each of the remaining wires from the speed switch or system switch to test intermediate speeds If the control is in the MoneySaver mode and the thermostat calls for cooling the
58. he same symptoms as an overcharged system Suction Pressure Indoor Coil Noticeably High over charge can cause the compressor to fail since it would be slugged with liquid refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of overcharge Suction pressure should be slightly higher Pressure Compressor Slightly Slugged with Refrigerant Overcharged System 32 Restricted Refrigerant System quick check for either condition begins at the evaporator With a partial restriction there may be gurgling sounds at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specificat
59. head pressure operate solenoid If no shi u shift replace valve does not Body damage Replace valve complete Valve hung up at mid stroke Pumping Raise head pressure operate solenoid If no reversal volume of compressor not sufficient to shift use valve with smaller ports maintain reversal Both ports of pilot open Raise head pressure operate solenoid If no shift replace valve Apparent Piston needle on end of slide leaking Operate valve several times then recheck If leap in excessive leak replace valve M Pilot needle and piston needle leaking Operate valve several times then recheck If heating excessive leak replace valve Pressure differential too high Stop unit Will reverse during equalization period Recheck system Clogged pilot tube Raise head pressure operate solenoid to free dirt If still no shift replace valve Dirt in bleeder hole Raise head pressure operate solenoid Remove valve and wash out Check on air i before reinstalling if no movement replace Will not shift valve Add sirainer to discharge tube Mount from heat to valve horizontally cool Piston cup leak Stop unit After pressures equalize restart with solenoid deenergized If valve shifts reattempt with compressor running If it still will not reverse while running replace the valve Defective pilot Replace valve Defective compressor Replace compressor Troubleshoot
60. ides on page if the control is malfunctioning Figure 9 System Control Panel XQ Models Only gt PM X STAR Exhaust 1 1 SUPER HIGH EFFICIENCY Power On Off Cool Fan 9 Fan Only Clock Set Start Stop Timer On Off On Vent shut SYSTEM CONTROL PANEL Models Only See Figure 10 The KQ Model unit uses a five position control switch to regu late the operation of the unit Function of each position clock wise rotation is as follows Figure 10 System Control Panel KQ Models Only KSTAR ay Hi Ori Cool Fan Low 0 Low Cool Fan ULTRA QUIET Wait three minutes before restarting Temperature Off Turns everything off 2 Hi Fan Maximum circulation of filtered room air no cooling 3 Low Fan Fan runs slower for less circulation of fil tered room air 4 Low Coo Fan runs slowly for quiet operation when maximum cooling is not needed 5 Hi Cool Highest fan speed for maximum cooling SYSTEM CONTROL SWITCH TEST See Figure 11 Turn knob to phase of switch to be tested There must be continuity as fol lows 1 Hi Fan Position between terminals L1 and H 2 Low Fan Position between terminals L1 and L 3 Low Cool Position between terminals L1 and L and C 4 Hi Cool Position between terminals L1 and H and C Figure 11 System Control
61. ing Cooling PROBLEM POSSIBLE CAUSE TO CORRECT Compressor does not run PROBLEM Low voltage Check for voltage at compressor 115 volt and 230 volt units will operate at 10 voltage variance Thermostat not set cold enough or inoperative Set thermostat to coldest position Test thermostat and replace if inoperative Compressor hums but cuts off on overload Hard start compressor Direct test compressor If compressor starts add starting components Open or shorted compressor windings Check for continuity and resistance Open overload Test overload protector and replace if inoperative Open capacitor Test capacitor and replace if inoperative Inoperative system switch Test for continuity in all positions Replace if inoperative Broken loose or incorrect wiring POSSIBLE CAUSE Refer to appropriate wiring diagram to check wiring TO CORRECT Fan motor does not run PROBLEM Inoperative system switch Test switch and replace in inoperative Broken loose or incorrect wiring Refer to applicable wiring diagram Open Capacitor Test capacitor and replace if inoperative Fan speed switch open Test switch and replace if inoperative Inoperative fan motor POSSIBLE CAUSE Test fan motor and replace if inoperative Be sure internal overload has had time to reset TO CORRECT Does not cool or cools
62. ion With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system Restricted refrigerant systems display the same symptoms as low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run in a deep vacuum When the unit is shut off the gauges will not equalize at all Accumulator Suction Pressure Indoor Lower Gauges may egualize very slowly Partially Restricted System Outdoor Coll Gauges will not equalize with unit shut off Completely Restricted System 33 Routine Maintenance NOTE Units are to be inspected and serviced by qualified service personnel only gt o Cl
63. ircuit Fuse Circuit Breaker Use ONLY type and size fuse or HACR circuit breaker indicated on unit s rating plate Proper current protection to the unit is the responsibility of the owner Grounding Unit MUST be grounded from branch circuit through service cord to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded Receptacle The field supplied outlet must match plug on service cord and be within reach of service cord Do NOT alter the service cord or plug Do NOT use an extension cord Refer to the table above for proper receptacle and fuse type N CAUTION Electric shock hazard Turn off electric power before service or installation All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Failure to do so can result in property damage personal injury and or death RUINS APACITY amp AMPERES AHAM It matters The consumer through the AHAM Room Air Conditioner Certification Program can be certain that the AHAM Certification Seal accurately states the unit s cooling and heating capacity rating the amperes and the energy efficiency ratio 13 COMPONENTS OPERATION amp TESTING WARNING DISCONNECT ELECTRICAL POWER TO UNIT BEFORE SERVICING OR TESTING C
64. itch See Figure 8 This rocker switch can be depressed to either YES or NO In the YES position you will get the most economical operation Both the fan and the compressor will cycle on and off together maintaining the selected temperature at a more constant level and reducing the humidity more efficiently This control will only operate when the unit is in a cooling mode In the NO position the fan will run constantly as long as the unit is in the cooling mode Disconnect leads from switch Depress switch to function being tested 1 When YES is depressed there should be continuity between terminals 1 and 2 2 When NO is depressed there should be continuity between terminals 2 and 3 Rocker Switch Figure 8 BACK VIEW SYSTEM CONTROL PANEL XQ MODELS ONLY See Figure 9 1 Power button turns the unit on and off 2 Fan Speed button allows selection between three cool ing speeds and fan only 3 mode button allows the unit to switch between modes i e fan only cooling etc 4 Timer on off button allows for programmed on and off times one hour increments 5 The plus and minus buttons allows adjustments for room air temperature 6 Sethour button enables the unit s timer on off feature to operate for times selected 7 Exhaust vent shut feature if applicable allows for room air to continuously recalculate or if enabled to exhaust stale air Note Please refer the troubleshooting gu
65. itor will indicate a low resistance and the pointer will move to the 0 end of the scale and remain there as long as the probes are connected An open capacitor will show no movement of the pointer when placed across the terminals of the capacitor CHECK See Figure 39 A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle Figure 39 One way Check Valve Heat Pump Models Xj The slide check inside the is made of teflon Should it become necessary to replace the check valve place a wet cloth around the valve to prevent overheating during the brazing operation CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil Inthe heating mode of operation high pressure refrigerant enters the check valve from the opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil Failure of the slide in the check valve to seat properly in either mode o
66. l Unit undersized Check heat rise across coil Refer to performance data sheet on heat rise at various outdoor ambients If heat rise is satisfactory check if insulation can be added to attic or walls PROBLEM POSSIBLE CAUSE TO CORRECT Incorrect wiring Refer to applicable wiring diagram Unit cools when Defective solenoid coil Check for continuity of coil heat is called for Heversing valve fails to shift Block condenser coil and switch unit to cooling Allow pressure to build up in the system then switch to heating If valve fails to shift replace valve inoperative system Switch PROBLEM POSSIBLE CAUSE TO CORRECT Heating capillary tube partially Check for partially starved outer coil Replace heating restricted capillary tube Cooling is ad Check valve leaking internally Switch unit several times from heating to cooling equate but heating Check temperature rise across the coil Refer to specification sheet correct temperature rise is insufficient sansurelent Reversing valve failing to shift Deenergize solenoid coil raise head pressure ener completely bypassing hot gas gize solenoid to break loose If valve fails to make complete shift replace valve 41 PROBLEM POSSIBLE CAUSE TO CORRECT Compressor will not turn Outdoor thermostat Refer to the heating data on applicable models for off and operate on heating Applicable models the preselected temperature the compre
67. l Check temperature differential across coil Touch test coil return bends for same tempera ture Test for low running current PROBLEM POSSIBLE CAUSE TO CORRECT Excessive heat load Unit undersized Test cooling performance of unit Replace with larger unit Compressor runs Restriction in line Check for partially iced coil Check temperature split continually across coil Refrigerant leak Check for oil at silver soldered connections Check ks for partially iced coil Check split across coil Check Does not cycle off for low running amperage remain closed PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat contacts stuck Replace thermostat Thermostat does not Thermostat set at coldest point Turn to higher temperature setting to see if the unit turn unit off cycles off Incorrect wiring Refer to appropriate wiring diagram Unit undersized for area to be cooled Refer to Sizing Chart PROBLEM POSSIBLE CAUSE TO CORRECT Overload inoperative Opens too soon Check operation of unit Replace overload if system operation is satisfactory Compressor attempts to start before Allow a minimum of two 2 minutes for pressures system pressures are equalized to equalize before attempting to restart Instruct customer of waiting period Low or fluctuating voltage Check voltage with unit operating Check for other Compressor attempts appliances on circuit Air conditioner should be on to start or runs for se
68. liquid process tube Attach gauges to the high and low sides of the system Start the system and run a cooling or heating performance test If test shows A Below normal high side pressure B Above normal low side pressure C Low temperature difference across coil The compressor valves are faulty replace the compressor THERMAL OVERLOAD External Some compressors are equipped with an external overload which is located in the compressor terminal box adjacent to the compressor body See Figure 3 The overload is wired in series with the common motor terminal The overload senses both major amperage and compressor temperature High motor temperature or amperage heats the disc causing it to open and break the circuit to the common motor terminal Figure 3 External Overload OVERLOAD Heat generated within the compressor shell is usually due to High amperage Low refrigerant charge Frequent recycling fu con is hee Dirty condenser TERMINAL OVERLOAD TEST Compressor External Type 1 Remove overload 2 Allow time for overload to reset before attempting to test 3 Apply ohmmeter probes to terminals on overload wires There should be continuity through the overload TERMINAL OVERLOAD Internal Some model compressors are equipped with an internal overload The overload is embedded in the motor windings to sense the winding temperature and or current draw The overload is connected in series with t
69. ly inspect all control components both electrical and mechanical as well as the power supply Use proper testing instruments voltmeter ohmmeter ammeter wattmeter etc to perform electrical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating temperatures Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors Inspect the surrounding area inside and outside to ensure that the units clearances have not been compromised or altered Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the chassis Troubleshooting Touch Test Chart Service Reversing Valves NOTES VALVE OPERATING CONDITION TEMPERATURE OF VALVE BODY WARMER THAN VALVE BODY DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE COIL Tube to OUTSIDE Capillary Tube Capillary Tube LEFT Pilot RIGHT Pilot a POSSIBLE CAUSES CORRECTIONS Hot Cool Cool TVB Cooling as 2 Hot Cool Hot TVB TVB as
70. n intermittent hissing and gurgling sound indicates a low refrigerant charge Intermittent frosting and thawing of the evaporator is another indication of a low charge however frosting and thawing can also be caused by insufficient air over the evaporator Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal it is an indication of a low refrigerant charge A check of the amperage drawn by the compressor motor should show a lower reading Check the Unit Specification After the unit has run 10 to 15 minutes check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures 31 refrigeration drawing Accumulator Suction Pressure Much Lower Indoor Coil Ili Reversing 1 valve Head Pressure Lower I Compressor Running Quieter than Normal Amps Lower Undercharged System Overcharged Refrigerant Systems Compressor amps will be near normal or higher Noncondensables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indicate some of t
71. n to all models IMPORTANT lt will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required in installation and repair and who is equipped with the proper tools and test instruments Installation or repairs made by unqualified persons can result in hazards subjecting the unqualified person making such repairs to the risk of injury or electrical shock which can be serious or even fatal not only to them but also to persons being served by the equipment If you install or perform service on equipment you must assume responsibility for any bodily injury or property damage which may result to you or others Friedrich Air Conditioning Company will not be responsible for any injury or property damage arising from improper installation service and or service procedures Outdoor Grille UNIT IDENTIFICATION Model Number Code SS08J 10 R 1st Digit Function 8th Digit Engineering S Straight Cool Value Series Major change C Straight Cool Budget Series E Electric Heat 0 Straight Cool amp Heat Pump Models 1 1 KW Heat Sirip Normal Cool Challenger 3 KW Heat Strip Normal eries 4 4 KW Heat Strip Normal W Thru the Wall 5 5 KW Heat Stri
72. nally the reversing valve may stick in the heating or cooling position or in the mid position When stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve If valve fails to change its position test the voltage to the valve coil while the system is in the heating cycle If voltage to coil is satisfactory replace reversing valve Should the valve fail to shift from cooling to heating block the 28 air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasing the discharge pressure replace the valve NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around
73. od coil contact made Room temperature uneven Heating cycle 40 PROBLEM POSSIBLE CAUSE TO CORRECT Outdoor thermostat does not cut off Defective thermostat replace Unit does not heat compressor at the preselected tem adequately perature and bring on heating element Fresh air or exhaust door open Check if operating properly Instruct customer on proper use control Dirty filter Clean as recommended in Owner s Manual Unit undersized Check heat rise across coil Refer to perfor mance data sheet on heat rise at various outdoor ambients If heat rise is satisfactory check if insulation can be added to attic or walls PROBLEM POSSIBLE CAUSE TO CORRECT Incorrect wiring Refer to applicable wiring Reversing valve fails to shiflt Block condenser coil and switch unit to cooling Allow pressure to build up in system then switch to heating If valve fails to shift replace valve Inoperative system switch Check for continuity of system switch POSSIBLE CAUSE TO CORRECT Unit cools when heat is called for Outdoor thermostat does not cut off Defective thermostat replace compressor at the preselected tempera ture and bring on the heating element Unit does not heat adequately Fresh air or exhaust door open Check if operating properly Instruct customer on proper use of control Clean as recommended in Owners Manual Clean as recommended in Owner s Manua
74. odels TC MPCRAT USL 779 SYSTEM CONTROL SWITCH TEST Disconnect leads from control switch See Figure 19 There must be continuity as follows 1 Off Position no continuity between terminals 2 Lo Coo Position between terminals L1 and C LO and MS 3 Med Position between terminals L1 and C M and MS 4 Hi Cool Position between terminals L1 and C H and MS 5 Fan Only Position between terminals L1 and 2 Figure 19 System Control Switch WS Models SYSTEM CONTROL SWITCH WE amp WY Models See Figure 20 An eight position switch is used to regulate the operation of the fan motor compressor and electric heater The unit can be operated in cooling or heating mode with the compressor or electric heater on and the fan motor operating on low medium or high speed The fan motor can also be operated independently on medium speed See switch section as indicated on decorative control panel Figure 20 System Control Panel WE amp WY Models SYSTEM CONTROL SWITCH TEST See Figure 21 Disconnect leads from control switch Turn control to position being tested There must be continuity as follows 1 Off Position no continuity between terminals 2 Lo Coo Position between terminals C and 3 C2 and 2 LO and M S AR and 5 3 Med Cool Position between terminals 3 2 2 and M
75. onic control pad by pressing the FAN SPEED button and the temperature UP button at the same time on XQ models 2 Check the room temperature at the electronic control pad by pressing at the same time the FAN SPEED button and the WARMER button on QME models The indoor temperature will display for 10 seconds Indoor temperature can be viewed in all modes including the TEST mode The display can be changed back to SET temperature by pressing any key except the ON OFF button or after 10 seconds has elapsed Activating Test Mode Activate test mode by pressing at the same time the MODE button and the temperature DOWN button on XQ models LEDs for Hour Start and Stop will blink 1 bps while Test Mode is active Activate test mode by pressing at the same time the MONEY SAVER button and the FILTER ALERT button on QME models LED for the Filter Alert will blink 1 bps while Test Mode is active Test Mode has duration of 90 minutes Test Mode can be activated under any conditions including Off Test Mode is cancelled by pressing the On Off button unplugging the unit or when the 90 minutes is timed out All settings revert to the factory default settings of Cool 75 degrees F Timer and Set Hour features are nonfunctional Test Mode overrides the three minute lockout all delays for compressor and fan motor start speed change and no delay when switching modes Test Mode default settings are ON Money Saver 60 degrees F
76. oom thermostat will then control the cycling of the element when the selected indoor temperature is reached Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed A cold resistance reading of approximately 14 5 ohms for the 3 3 KW heater 11 9 ohms for the 4 0 KW heater and 9 15 ohms for the 5 2 KW heater should be registered SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRES THE INSTALLATION OF A SUCTION LINE DRIER IN THE SUCTION LINE BETWEEN THE EVAPORATOR AND THE REVERSING VALVE EQUIPMENT REQUIRED 1 Voltmeter 2 Ammeter 3 Ohmmeter 4 E P A Approved Refrigerant Recovery System 5 Vacuum Pump capable of 200 microns or less vacuum 6 Acetylene Welder 7 Electronic Halogen Leak Detector G E Type H 6 or equivalent 8 Accurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy 9 High Pressure Gauge 0 400 Ibs 10 Low Pressure Gauge 30 150 16 11 Vacuum Gauge 0 1000 microns 29 EQUIPMENT MUST BE CAPABLE OF 1 Recovery CFC s as low as 5 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the sys tem 4 Accurately weighing the refrigerant charge actually in troduced into the system 5 Facilities
77. p Normal WallMaster Series 8 8 KW Heat Strip Normal 2nd Digit eth Digit Voltage C Casement 1 115 Volts 2 230 Volts PowerMiser Portable 3 230 208 Volts O Star Medium Chassis 5th Digit Large Chassis Alphabetical Modifier W Built In H HazardGard 3rd and 4th Digit Approximate BTU HR Cooling Heating BTU Hr capacity listed in the Specification Performance Data Section Serial Number Decade Manufactured 00001 L 0 C 3 F 6 A 1 D 4 G 7 B 2 E 5 H 8 Production Run Number Year Manufactured PRODUCT LINE A 1 D 4 G 7 S RAC B 2 E 5 H 8 P PTAC 3 6 4 9 Month Manufactured V VPAK A Jan D Apr G Jul K Oct H Split B Feb H Aug L Nov C Mar F Jun J Sep ROOM AIR CONDITIONER SPECIFICATIONS Enerey Star Qualified Cooling Capacity Model BTU h Heating Capacity BTU h Electrical Characteristics 60 Hertz Volts Rated Cooling Amps Cooling Watts Heating Amps Heating Energy Efficiency Ratio Watts i Net Weight Lbs Room Side Air Circulation CFM Moisture Removal Pints Hr Sleeve XSTAR XQ05 5400 46 507 07 15 160 70 XQ06 6200 51 564 10 20 160 7 008 0 7800 66 729 0 7 19 175 QUIETMASTER Electronic 5508 8200 6 7 745 10 20 310 5509 9000 74 837 08 17 300 5510 10200 75 8
78. parate circuit for proper voltage and be fused short periods only separatel Cycles on overload Refer to appropriate wiring diagram correct rating Check for proper fan speed or blocked condenser condenser coil Check for kinked discharge line or restricted condenser PROBLEM POSSIBLE CAUSE TO CORRECT Loss of charge in thermostat bulb Place jumper across thermostat terminals to check Thermostat does not if unit operates If unit operates replace thermostat turn unit on Loose or broken parts in thermostat Check as above Incorrect wiring Refer to appropriate wiring diagram 37 PROBLEM POSSIBLE CAUSE TO CORRECT Poorly installed unit Refer to Installation Instructions for proper installation Fan blade striking chassis Reposition adjust motor mount Check that compressor grommets have not MOL Gelin Compressor vibrating deteriorated Check that compressor mounting parts are not missing and that shipping blocks have been Improperly mounted or loose cabinet Check assembly and parts for looseness parts rubbing and rattling PROBLEM POSSIBLE CAUSE TO CORRECT Evaporator drain pan overflowing Clean obstructed drain trough Condensation forming on base pan Evaporator drain pan broken or cracked Reseal or Water leaks into room replace Poor installation resulting in rain Check Installation Instructions Reseal as required emer asear Condensation on discharge grilles Dirty
79. perature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F HEATING ELEMENT See Figure 44 All heat pumps and electric heat models are equipped with a heating element with the exception of the YS09J10 The YS ES and EK12 models are equipped with a 3 3 KW element The YM EM and EK18 models are equipped with a 4 0 KW element The YL and EL models are equipped with a 5 2 KW element The heating element contains a fuse link and a heater limit switch The fuse link is in series with the power supply and will open and interrupt the power when the temperature reaches 161 6 F or a short circuit occurs in the heating element Once the fuse link separates a new fuse link must be installed NOTE Always replace with the exact replacement The heater element has a high limit control This control is a bimetal thermostat mounted in the top of the heating element Figure 44 Heating Element Should the fan motor fail or filter become clogged the high limit control will open and interrupt power to the heater before reaching an unsafe temperature condition The control is designed to open at 110 F 6 F Test continuity below 110 F and for open above 110 F The heating element for the Y model is energized by an outdoor thermostat The outdoor thermostat is adjusted at a predetermined temperature to bring on the heating element and turn off the compressor The r
80. rator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant Undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead to compressor motor or overload failure METHOD OF CHARGING The acceptable method for charging the RAC system is the Weighed in Charge Method The weighed in charge method is applicable to all units It is the preferred method to use as itis the most accurate The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair compressor replacement or when there is no refrigerant charge
81. ssor shuts element only during low off and the electric element is energized outside ambients PROBLEM POSSIBLE CAUSE TO CORRECT Fuse link Check link for continuity If defective replace Compressor shuts off on outdoor thermostat but Heating element shorted draw of element If no amperage ges pest Check voltage to element If voltage is okay check wiring 42 Troubleshooting Heating Cooling Electric Models PROBLEM POSSIBLE CAUSE TO CORRECT Heater relay or contactor coil open Check continuity of coil Heater relay or contactor stuck open Inspect test continuity with ohmmeter Fan Operates pitted or burned heating element does High limit control open Check continuity if open replace not come on Open thermal fuse Check continuity Check reason for failure Open or shorted element Check voltage across heater terminals Check amperage draw of heater Loose connections Tighten all terminals PROBLEM POSSIBLE CAUSE TO CORRECT Restricted filter Clean as recommended in Owner s Manual Cycling high limit control Control is set to open at 155 F 5 F and close at 130 F 8 F If cycling prematurely replace control Heating inadequate Exhaust or fresh air door open Check position of fresh air door control slide Adjust cable if door does not close properly PROBLEM POSSIBLE CAUSE TO CORRECT Fan relay contacts open Check continuity of f
82. t in the heat position heating element only will be energized when outdoor temperature is below the operating range of the heat pump Figure 27 System Control Panel Heat Pump amp Electric Heat Models YS ES YM EM YL amp EL Warmer Cooler Wait three minutes before restarting 21 SYSTEM CONTROL SWITCH TEST See Figure 28 Disconnect leads from control switch Turn control to position being tested There must be continuity as follows 1 Off Position no continuity between terminals 2 Lo Cool Position between terminals and 3 C2 and 2 LO and M S AR and 5 3 Med Cool Position between terminals 3 2 2 M S AR and 5 4 Hi Cool Position between terminals C and 3 C2 and 2 H and M S AR and 5 5 Hi Heat Position between terminals C and 1 C2 and 4 M S AR and 5 6 Med Heat Position between terminals 1 2 4 M S AR and 5 7 Lo Position between terminals C and 1 C2 and 4 LO and M S AR and 5 8 Fan Only Position between terminals Li and M Figure 28 System Control Switch Heat Pump Electric Heat Models Smart Center Electronic Control Center See Figure 29 FILTER ALERT light will come on after 250 hours of use Touch FILTER ALERT to reset TO SET MODE OF OPERATION Wh
83. th contacts between terminals 2 and 3 closing on temperature rise and contacts between terminals 2 and 1 closing on temperature fall When the contacts between terminals 2 and 1 make power is supplied to the heater element This control is dual purpose control that acts as an outdoor thermostat and defrost control When the sensing bulb attached to the condenser coil senses enough icing on the outdoor coil it will interrupt power to the compressor and supply power to the heating element until the coil temperature reaches above 43 then the heater will shut off and the unit will resume operating in the reverse cycle mode When the outdoor coil temperature drops below 20 the unit willoperate in electric heat mode continuously until the outdoor coiltemperature rises above 43 The fan motor will not turn off when defrost occurs and the 4 way valve will not reverse Figure 35 Defrost Thermostat Heat Pump Models 25 DEFROST BULB LOCATION Heat Pump Models Only See Figure 36 The defrost control bulb must be mounted securely and in the correct location to operate properly Figure 36 Defrost Thermostat Bulb Location All Heat Pump Models Retainer Slide the bulb end of the thermostat defrost under the retainer as shown RESISTOR Heat Anticipator See Figure 37 Failure of the resistor will cause prolonged off and on cycles of the unit When replacing a resistor be sure and use the e
84. thermostat is used on all heat pump and electric heat units In addition to cycling the unit in a heating or cooling operation the thermostat will terminate the cooling cycle in the event ice forms on the evaporator coil in this case the thermostat functions as a de ice control A resistor anticipator is positioned within a plastic block to supply a small amount of heat to the bulb area to prevent long off cycles in the Cool Fan Auto MoneySaver position see Figure 8 Acurrent feedback through the fan motor windings during off cycle completes the circuit to the resistor In the heating cycle the heat anticipator is energized to supply a small amount of heat during the on cycle This will open the contacts in the thermostat prematurely to maintain a closer differential between the cut in and cut out temperature The heat anticipator is energized in the heating mode regardless of whether fan is placed in the automatic MoneySaver or constant run position RANGE Cooling Model Thermostat 60 F 2 to 92 F 449 TEST Cooling Heating Models Remove wires from thermostat and check continuity between terminal 2 common and 3 for cooling Check between terminals 2 common and 1 for heating Also check that contacts in thermostat open after placing in either position NOTE Temperature must be within range listed to check thermostat Refer to the troubleshooting section in this manual for additional information on th
85. ute time delay ten times in one hour Investigate and correct short cycling problem E2 KEYBOARD STUCK ERROR If key button s are pressed continuously for twenty seconds or more If MODE key is stuck unit will default to cool Exit Error Code Mode to see if error E2 is no longer displayed and unit is functioning Replace board if E2 still displays after exiting Error Code Mode FROST PROBE OPEN Normal operation is allowed Ohm frost probe Replace probe if ohm value not read If ohm value present replace board 4 FROST PROBE SHORT Normal operation allowed Replace probe E5 INDOOR PROBE OPEN Control assumes indoor ambient temperature is 90 degree F and unit will operate Ohm indoor probe Replace probe if ohm value not read E6 INDOOR PROBE SHORT Control assumes ambient temperature is 90 degree F and unit will operate Replace probe NOTE All Error Code displays for Frost amp Indoor Probe will allow unit to operate Unit may or will ice up if faulty components not replaced FROST PROBE SENSOR disables compressor at 35 degrees F INDOOR PROBE SENSOR Control range is 60 degrees F to 90 degrees F 2 degrees F Indoor temperature will be displayed by pressing 23 Units The Fan Speed button and the button XQ Units The Fan Speed button and the Temp Up button The indoor temperature will be displayed for 10 seconds The display will change back to the Set Point temperature by pressing any
86. xact replacement Resistor ratings are as follows 115 Volt 5 000 ohms 3 watt 230 Volt 20 000 ohms 3 watt Figure 37 Resistor 26 CAPACITOR RUN See Figure 38 Arun capacitor is wired across the auxiliary and main winding of asingle phase permanent split capacitor motor such as the compressor and fan motor A single capacitor can be used for each motor or a dual rated capacitor can be used for both The capacitor s primary function is to reduce the line current while greatly improving the torque characteristics of a motor The capacitor also reduces the line current to the motor by improving the power factor of the load The line side of the capacitor is marked with a red dot and is wired to the line side of the circuit Figure 38 Dual Rated Run Capacitor Hook up FAN MOTOR 20 RUN CAPACITOR COMPRESSOR CAPACITOR TEST 1 Remove capacitor from unit 2 Check for visual damage such as bulges cracks or leaks 3 dual rated apply ohmmeter lead to common C terminal and the other probe to the compressor HERM terminal A satisfactory capacitor will cause a deflection on the pointer then gradually move back to infinity 4 Reverse the leads of the probe and momentarily touch the capacitor terminals The deflection of the pointer should be two times that of the first check if the capacitor is good 5 Repeat steps 3 and 4 to check fan motor capacitor NOTE Ashorted capac

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