Friedrich racservmn Service Manual
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Friedrich racservmn Service Manual

Friedrich racservmn Service Manual

Friedrich air conditioner model number: racservmn
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Service Manual

2003
Room Air Conditioners
RACServMn (7-03)

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Summary of Contents for Friedrich racservmn

  • Page 1: Service Manual

    Service Manual 2003 Room Air Conditioners RACServMn (7-03)

  • Page 2: Table Of Contents

    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.

  • Page 3: Unit Identification

    1st Digit – Function S = Straight Cool, Value Series C = Straight Cool, Budget Series Y = Heat Pump E = Electric Heat K = Straight Cool, Challenger Series W = Thru-the Wall, WallMaster Series 2nd Digit C = Casement P = PowerMiser "Portable"...

  • Page 5: Unit Performance

    PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge Temp. Drop F. EQ08J11-A 50.5 EQ08J11-B 50.5 DATA* EVAPORATOR AIR Cooling TEMP. DEG. F. Discharge Temp. Drop F. XQ05J10B 55.45 XQ06J10-A 51.45 XQ06J10-B 51.45 XQ07J10-1 52.22 XQ08J10-1 50.5 XQ08J10-A 50.5 PERFORMANCE EVAPORATOR AIR DATA* TEMP.
  • Page 6 PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge RS10J10-C RS12J10A-B RS15J10-A RS16J30A-A 56.5 RS18J30-A RM24J30-A PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge YS09J10B-A YS12J33-A YM18J34B-A YL24J35C-A * Rating Conditions: 80 degree F. Room Air Temperature and 50% Relative Humidity with 95 degree F.
  • Page 7 PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge Temp. Drop F. ES12J33B-A ES16J33A-A EM18J34B-A EL25J35-A EL35J35-A EL35J35-B PERFORMANCE Heat Rise DATA heating ES12J33B-A 30.5 ES16J33A-A 30.5 EM18J34B-A 28.3 EL25J35-A 28.6 EL35J35-A 22.9 EL35J35-B 22.9 DATA* EVAPORATOR AIR Cooling TEMP. DEG. F. Discharge Temp Drop F.
  • Page 8 PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge SS08J10R-B 61.4 SS08J10R-A 61.4 SS09J10C-A 57.8 SS10J10AR-A 57.22 SS12J10AR-B 57.2 SS14J10R-A 57.22 SS12J30D-A 57.2 SS16J30A-A 56.9 SS18J30R-A 56.9 PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F Cooling Discharge SM20J30-A 52.58 SM24J30-A 54.86 SL25J30-A 52.32 SL28J30B-A...
  • Page 9 PERFORMANCE EVAPORATOR AIR DATA* TEMP. DEG. F. Cooling Discharge Temp. Drop F. WS07A10E-B 59.5 19.5 WS07A10E-C 59.5 19.5 WS07A10E-D 59.5 19.5 WS10A10-A WS10A10-B WS12A10E-B WS13A10-A WS09A30E-B WS12A30E-A 47.1 32.9 WS12A30E-B WS15A30-A DATA* EVAPORATOR Cooling TEMP. DEG. F. Discharge Temp. Drop F. WE09A33E-C WE12A33E-B WE15A33-A...

  • Page 10: Performance Data

    SPECIFICATIONS BTUH (Cooling) E.E.R. (Cooling) Volts Amperes (Cooling) Total Watts (Cooling) Hertz Fuse/Breaker Size Fan RPM Evaporator Air CFM Dehumidification Pts/Hr Width Height Depth Minimum Ext. Into Room Minimum Ext. To Outside Net Weight Shipping Weight PERFORMANCE DATA (Heating) AHAM @ 70°F Inside 47°F Outside @ 70°F Inside 35°F Outside Evaporator Air Temperature Rise...
  • Page 11 PERFORMANCE DATA (Heating) BTUH @70°F Inside 62°F Outside @70°F Inside 57°F Outside @70°F Inside 52°F Outside @70°F Inside 47°F Outside @70°F 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°F Inside 47°F Outside...

  • Page 12: Refrigeration Sequence Of Operation

    A good 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.

  • Page 13: Electrical Rating Tables

    * 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.

  • Page 14: Compressor

    COMPONENTS: OPERATION & TESTING WARNING DISCONNECT ELECTRICAL POWER TO UNIT BEFORE SERVICING OR TESTING COMPRESSORS 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.

  • Page 15: Thermal Overload (Internal)

    Heat generated within the compressor shell is usually due to: 1. High amperage 2. Low refrigerant charge 3. Frequent recycling 4. Dirty condenser TERMINAL OVERLOAD - TEST (Compressor - External Type) 1. Remove overload. 2. Allow time for overload to reset before attempting to test.
  • Page 16 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".
  • Page 17 SYSTEM CONTROL PANEL ("KQ" 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) 1.
  • Page 18 Figure 13 System Control Switch (EQ Models) SYSTEM CONTROL PANEL ("YQ" Model Only) (See Figure 14) The YQ 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.
  • Page 19 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.
  • Page 20 6. "Med Heat" Position-between terminals "C" and "1", "C2" and "4", "M" and "M/S", "AR" and "5". 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" and "M". Figure 21 System Control Switch Heat Pump / Electric Heat...
  • Page 21 SYSTEM CONTROL SWITCH - TEST Disconnect leads from control switch (See Figure 25) There must be continuity as follows: Figure 25 SYSTEM CONTROL SWITCH (See Figure 26) (Heat Pump & Electric Heat Models) An eight position control switch is used to regulate the operation of the fan motor and compressor.
  • Page 22 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 "C" and "3", "C2" and "2", "LO"...
  • Page 23 TO 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.

  • Page 24: Thermostats (Indoor)

    (QME Units) The Fan Speed button and the Warmer 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 key button except for the On/Off button.

  • Page 25: Thermostats (Defrost)

    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.

  • Page 26: Resistor (Heat Anticipator)

    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) Slide the bulb end of the thermostat defrost under the retainer as...

  • Page 27: Check Valve

    CHECK VALVE (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)

  • Page 28: Solenoid Coil (Heat Pump Models)

    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.

  • Page 29: Valve, Drain Pan

    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.

  • Page 30: Refrigerant Charging

    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.

  • Page 31: Undercharged Refrigerant Systems

    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.

  • Page 32: Overcharged Refrigerant Systems

    NOTE: Heat pump refrigeration drawing 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.

  • Page 33: Restricted Refrigerant System

    Restricted Refrigerant System A 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.

  • Page 34: Routine Maintenance

    NOTE: Units are to be inspected and serviced by qualified service personnel only. Clean 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.).

  • Page 35: Troubleshooting

    Troubleshooting Touch Test Chart: To Service Reversing Valves VALVE OPERATING CONDITION Normal Cool Cool Cooling as (2) as (1) Normal Heating Cool as (1) as (2) Check Electrical circuit and coil Valve will Check refrigeration charge not shift Cool Cool, from cool to as (2) heat.
  • Page 36 Troubleshooting: Cooling PROBLEM POSSIBLE CAUSE Low voltage. Thermostat not set cold enough or inoperative. Compressor does not Compressor hums but cuts off on run. overload. Open or shorted compressor windings. Open overload. Open capacitor. Inoperative system switch. Broken, loose or incorrect wiring. PROBLEM POSSIBLE CAUSE Inoperative system switch.
  • Page 37 Instruct customer of waiting period. Check voltage with unit operating. Check for other appliances on circuit. Air conditioner should be on separate circuit for proper voltage, and be fused separately. Refer to appropriate wiring diagram.
  • Page 38 PROBLEM POSSIBLE CAUSE Poorly installed unit. Fan blade striking chassis. Noisy operation. Compressor vibrating. Improperly mounted or loose cabinet parts. PROBLEM POSSIBLE CAUSE Evaporator drain pan overflowing. Condensation forming on base pan. Water leaks into room. Poor installation resulting in rain entering room.
  • Page 39 PROBLEM POSSIBLE CAUSE Evaporator drain pan cracked or obstructed. Outside water leaks. Water in compressor area. Obstructed condenser coil. Fan blade and slinger ring improperly positioned. PROBLEM POSSIBLE CAUSE Insufficient air circulation in air condi- tioned area. High indoor Oversized unit. humidity.
  • Page 40 Troubleshooting: Heating PROBLEM POSSIBLE CAUSE Thermostat setting. Defective thermostat. No heating — fan Compressor not operating. operates. Defective system switch. PROBLEM POSSIBLE CAUSE Restricted filter. Outdoor thermostat. Insufficient heating. (Applicable models.) Fresh air or exhaust door open. POSSIBLE CAUSE PROBLEM Fan operates in Inoperative system switch.
  • Page 41 PROBLEM POSSIBLE CAUSE Outdoor thermostat does not cut off compressor at the preselected tem- Unit does not heat perature and bring on heating element. adequately. Fresh air or exhaust door open. Dirty filter. Unit undersized. PROBLEM POSSIBLE CAUSE Incorrect wiring. Defective solenoid coil.
  • Page 42 PROBLEM POSSIBLE CAUSE Outdoor thermostat. Compressor will not turn (Applicable models.) off and operate on heating element only during low outside ambients. PROBLEM POSSIBLE CAUSE Fuse link. Compressor shuts off on Heating element shorted. outdoor thermostat but element does not heat. Incorrect wiring.
  • Page 43 Troubleshooting: Heating PROBLEM POSSIBLE CAUSE Heater relay or contactor coil open. Heater relay or contactor stuck open, Fan Operates – pitted or burned. heating element does High limit control open. not come on. Open thermal fuse. Open or shorted element. Loose connections.

  • Page 44: Refrigerant System

    POSSIBLE CAUSE PROBLEM Outdoor thermostat. Compressor will not (Applicable models.) turn off and operate on heating element only during low outside ambients. Troubleshooting Chart — Cooling Low Suction Pressure Low Load Conditions Low Air Flow Across Indoor Coil Refrigerant System Restriction Undercharged Moisture in System...
  • Page 45 Troubleshooting Chart — Heating Low Suction Pressure High Suction Pressure Outdoor Ambient Too High Low Airflow for Operation in Heating Across Outdoor Coil Refrigerant System Reversing Valve not Restriction Undercharged Defective Compressor Moisture in System Electrical Troubleshooting Chart Is Line Voltage Present at the Solenoid Is the Solenoid Coil Good? Reversing Valve Stuck...

  • Page 46: Wiring Diagrams "Rs", "Rm

    RS10J10C, RS12J10A-B, RS15J10A, RS16J30A-A, RS18J30A, RM24J30-A COMPRESSOR TERMINAL COMPRESSOR ORIENTATION MAY VARY. REFER TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR WIRE HARNESS BLACK TO CAPACITOR BRACKET BLUE TO CHASSIS SCHEMATIC X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT 1 2 3 4 LOW COOL...
  • Page 47 SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A WIRING DIAGRAM COMPRESSOR "F" "F" "F" HARNESS, COMPR. NOTE: ANTICIPATOR OPTIONAL RESISTOR CONFIGURATION BLACK CAPACITOR WHITE BLUE BROWN TO INNERWALL/ MOTOR MOUNT SCHEMATIC SYS SW X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT LOW COOL MED COOL HI COOL...
  • Page 48 KQ05J10B-B, KQ05E10-C KQ06J10B-A, KQ06J10B-B, KQ06E10-A, KQ06E10-B WIRE HARNESS COMPRESSOR GREEN/YELLOW TO GND SCREW SYSTEM SWITCH SEQUENCE CW ROT CONNECTION ALL OPEN HI FAN L1-H LO FAN L1-L LO COOL L1-L,L1-C HI COOL L1-H,L1-C LINE BLACK FAN MOTOR BROWN WHITE LINE LEGEND: = OPTIONAL FACTORY WIRING MODELS...
  • Page 49 KQ08J10B-1, KQ08J10B-A, KQ08J10C-A WIRE HARNESS PTCR (OPTIONAL) BLACK NOTE: BLACK OPTIONAL CONFIGURATION THERMOSTAT GREEN BROWN SEE DETAIL " A " TO GND SCREW SUPPLY CORD SYSTEM SWITCH SEQUENCE CW ROT CONNECTION ALL OPEN HI FAN L1-H LO FAN L1-L SCHEMATIC LO COOL L1-L,L1-C HI COOL...
  • Page 50 XQ05J10-B, XQ06J10-A, XQ06J10-B, XQ08J10-1, XQ08J10-A, XQ08J10A-A COMPRESSOR TERMINAL COMPRESSOR ORIENTATION MAY VARY. REFER TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR WIRE HARNESS CAPACITOR BLUE TO CAPACITOR BRACKET TO CHASSIS SCHEMATIC X = CLOSED SWITCH LOGIC O = OPEN SWITCH POSITION CIRCUIT HI COOL MED COOL...
  • Page 51 BLACK BLUE (HARNESS, COMPR. MOLDED) RIBBED (OR BLUE) CONDUCTOR DEFROST CONTROL SOLENOID BLUE COMPRESSOR BLACK BLACK WHITE THERMOSTAT GREEN SMOOTH (OR BROWN) CONDUCTOR TO GND SCREW BLUE SUPPLY CORD SCHEMATIC THERMOSTAT COMPRESSOR SOLENOID C' OVLD. PTCR (OPTIONAL) RUN CAPACITOR X = CLOSED SWITCH LOGIC O = OPEN SWITCH POSITION...
  • Page 52 MODEL: SC06H10D...

  • Page 53: Ss", "Sm

    SS08J10R-B, SS08J10R-A, SS09J10C-A, SS10J10AR-A, SS12J10AR-B, SS14J10R-A, SS12J30D-A, SS16J30A-A, SS18J30R-A, SM20J30-A, SM24J30-A COMPRESSOR TERMINAL COMPRESSOR ORIENTATION MAY VARY. REFER TO MARKINGS ON COMPRESSOR BLACK OVERLOAD ALTERNATE PROTECTOR COMPRESSOR COMPRESSOR WIRE HARNESS CAPACITOR BLUE TO CAPACITOR BRACKET GREEN OR GREEN/YELLOW TO INNERWALL/ MOTOR MOUNT TO CHASSIS SCHEMATIC...
  • Page 54 COMPRESSOR OVERLOAD PROTECTOR HARNESS, COMPRESSOR MOLDED BLUE TO CAPACITOR BRACKET TO CHASSIS SCHEMATIC X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT LOW COOL MED COOL HI COOL FAN ONLY MODELS SL28J30B-A, SL35J30-A, SL35J30-B COMPRESSOR TERMINAL ORIENTATION MAY VARY. REFER TO MARKING ON COMPRESSOR.

  • Page 55: Ks", "Km", "Kl

    KS10E10-A, KS10J10-B, KS12E10-A, KS12J10B-A, KS15J10-A, KS12J30B-A, KS18J30-A, KM20J30-A, KM24J30-A COMPRESSOR COMPRESSOR TERMINAL ORIENTATION MAY VARY. REFER TO MARKING ON COMPRESSOR. BLACK ALTERNATE COMPRESSOR OVERLOAD PROTECTOR HARNESS, COMPRESSOR MOLDED ANTICIPATOR RESISTOR BLACK OR WHITE BLACK CAPACITOR BLUE TO CAPACITOR BRACKET TO CHASSIS GREEN OR GREEN/YELLOW TO INNERWALL/...

  • Page 56: Es", "Em", "El", "Ek

    ES12J33B-A, ES16J33A-A, EM18J34B-A, EL25J35-A, EL35J35-B, EK18J34A BLUE YELLOW THERMOSTAT ANTICIPATOR RESISTOR SUPPLY CORD RIBBED CONDUCTOR OR BLUE TO CAPACITOR BRACKET SCHEMATIC 3 YES X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT 1 2 3 4 5 6 7 8 9 10 O O O O O O O O O O LOW COOL O O O X X O X O X O...

  • Page 57: Ys13", "Ym", "Yl

    YS12J33-A, YM18J34B-A, YL24J35C-A BLUE THERMOSTAT YELLOW DEFROST THERMOSTAT BLACK ORANGE BLACK BLUE BLACK OR WHITE ANTICIPATOR RESISTOR SUPPLY CORD RIBBED CONDUCTOR OR BLUE GREEN TO CAPACITOR BRACKET TO CAPACITOR TO CHASSIS BRACKET SCHEMATIC 1 NO SYSTEM SWITCH X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION...

  • Page 58: Ys09

    BLUE THERMOSTAT YELLOW DEFROST THERMOSTAT PINK ANTICIPATOR RESISTOR SUPPLY CORD RIBBED CONDUCTOR OR BLUE TO CAPACITOR BRACKET SCHEMATIC X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT 1 2 3 4 5 6 7 8 9 10 O O O O O O O O O O LOW COOL O O O X X O X O X O MEDIUM COOL...
  • Page 59 EQ08J11-A, EQ08J11-B WIRING DIAGRAM COMPRESSOR "F" "F" "F" HARNESS, COMPR. NOTE: OPTIONAL CONFIGURATION BLACK CAPACITOR WHITE BLUE BROWN SCHEMATIC SYS SW X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT COMPR OVLD HI COOL SYS SW LOW COOL LOW HEAT O X O HI HEAT...
  • Page 60 WS07A10E-B, WS07A10E-C, WS10A10-A, WS12A10E-A, COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR WIRE HARNESS BLUE SCHEMATIC X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION LOW COOL MED COOL HI COOL FAN ONLY MODELS WS09A30E-B, WS12A30E-A, WS15A30-A BLACK CAPACITOR WHITE (OR YELL0W) BROWN MOTOR HIGH MEDIUM...
  • Page 61 WE09A33E-B, WE12A33E-A, WE15A33-A WHITE PURPLE PINK BROWN THERMOSTAT YELLOW SUPPLY CORD SMOOTH CONDUCTOR RIBBED CONDUCTOR CAPACITOR SYS SW X = CLOSED SWITCH LOGIC 0 = OPEN SWITCH POSITION CIRCUIT 1 2 3 4 5 6 7 8 9 10 O O O O O O O O O O LOW COOL O O O X X O X O X O MEDIUM COOL...
  • Page 62 THERMOSTAT SUPPLY CORD TO GROUNDING SCREW SWITCH LOGIC SWITCH POSITION CIRCUIT 1 2 3 4 5 6 7 8 9 10 O O O O O O O O O O LOW COOL O O O X X O X O X O MEDIUM COOL O X O O X O X O X O HIGH COOL...

  • Page 63: Testing Xq And Qme Boards

    Testing The Electronic Control 2001 XQ Boards & QME 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. 2.
  • Page 64 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 RACServMn (7-03) Printed in the U.S.A.

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