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—17—

3. TROUBLESHOOTING GUIDE

3.1 OUTSIDE DIMENSIONS 

20-

3

/

32

"

(499mm)

24"

(610mm)

14-

3

/

8

"

(366mm)

CONDENSER  COILS

EVAPORATOR  COILS

FAN

MOTOR

: REFRIGERANT FLOW

TURBO FAN

CAPILLARY  TUBE

COMPRESSOR

3.2 PIPING SYSTEM

Following is a brief description of the important components and their functions in the refrigeration system.
Refer to Fig. 18 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE 

OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH

SUCTION LINE
COOL LOW PRESSURE VAPOR

COOLED
AIR

COMPLETE LIQUID
BOIL OFF POINT

LIQUID
PRESSURE
DROP

ROOM AIR HEAT LOAD

VAPOR INLET

HOT
DISCHARGED
AIR

LIQUID OUTLET

HIGH PRESSURE VAPOR

LIQUID REFRIGERANT

LOW PRESSURE VAPOR

ROOM AIR CONDITIONER

EVAPORATOR COILS

CONDENSER COILS

CYCLE OF REFRIGERATION

Figure 18

Summary of Contents for Uni-Fit Thru-the-Wall Series

Page 1: ...Unifit Cool Svc Parts 2010 05 10 Thru the Wall Series Thru the Wall Series Service and Parts Manual 115 Volts US08C10 US10C10 US12C10 Uni Fit R Unifit Cool 03 07 230 Volts US10C30 US12C30 US14C30...

Page 2: ...s various service information including the mechanical and electrical parts etc This room air conditioner was manufactured and assembled under a strict quality control system The refrigerant is charge...

Page 3: ...SLEEVE DIMESION inch W x H x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 115V 60Hz 8 000 830 7 5 9 6 400g 14 1OZ 80 DB 67 WB 95 DB 75 WB 2 ROW 12STACKS 5 2ROW 18STACKS L BENDING TYPE LOUVERED FINTY...

Page 4: ...EVE DIMESION inch W x H x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 115V 60Hz 9 800 1 040 9 6 9 4 445g 15 7OZ 80 DB 67 WB 95 DB 75 WB 2 ROW 12STACKS 3ROW 18STACKS L BENDING TYPE LOUVERED FINTYPE T...

Page 5: ...x H x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 230V 208V 60Hz 10 000 9 800 1060 1040 9 4 9 4 4 7 5 2 460g 16 2 OZ 2 ROW 12STACKS 3ROW 18STACKS L BENDING TYPE LOUVERED FINTYPE TURBO FAN PROPELLER...

Page 6: ...x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 230V 208V 60Hz 11500 11200 1220 1190 5 6 6 0 9 4 9 4 525g 18 0 OZ 2 ROW 12STACKS 3ROW 18STACKS L BENDING TYPE 1 ROW LOUVERED FINTYPE TURBO FAN PROPELLE...

Page 7: ...x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 230 208V 60Hz 11 500 11 200 1 220 1 190 5 6 6 0 9 4 9 4 510g 18 0OZ 2 ROW 12STACKS 3ROW 18STACKS L BENDING TYPE 1 ROW LOUVERED FINTYPE TURBO FAN PROPELL...

Page 8: ...x D mm SLEEVE DEPTH inch WITH FRONT GRILLE mm 1 230 208V 60Hz 13 000 12 600 1 530 1 480 7 0 7 5 8 5 8 5 510g 18 0OZ 2 ROW 12STACKS 3ROW 18STACKS L BENDING TYPE 1ROW LOUVERED FINTYPE TURBO FAN PROPELL...

Page 9: ...ENTILATION Push the lever to the CLOSE position to cool heat or recirculate room air only Pull the lever to the OPEN position to exhaust smoke or stale air from the room This feature is best used in c...

Page 10: ...he front grille Refer to section 2 1 1 2 Remove the screw which fasten the control box See Fig 3 3 Pull the control box from the barrier See Fig 3 4 Discharge the capacitor by placing a 20 000 ohm res...

Page 11: ...secures the turbo fan See Fig 6 9 Remove the turbo fan with pliers or your hand without touching blades See Fig 7 10 Re install the components by referring to the removal procedures above 2 2 2 FAN 1...

Page 12: ...move the cabinet Refer to section 2 1 2 2 Discharge the refrigerant system using a FreonTM Recovery System Install a valve for recovery before venting the Freon Remove the valve when finished 3 Discon...

Page 13: ...val procedure above Use only one ground marked hole for ground connection 8 If the supply cord of this appliance is damaged it must be replaced with the factory authorized and specified cord 2 3 5 ELE...

Page 14: ...screws which fasten the evaporator at the left side and the right side 4 Move the evaporator to the side carefully and then unbraze the interconnecting tube at the evaporator connectors 5 Remove the...

Page 15: ...ady for final charging 6 Recharge as follows 1 Refrigeration cycle systems are charged from the High side If the total charge cannot be put in the High side the balance will be put in the suction line...

Page 16: ...r proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve A COMPOUND GAUGE EVAPORATOR LOW PRESSURE SIDE COMPRESSOR CAPILLARY TUBE CONDENSER HIGH PRESSURE SIDE SEE INSETS B...

Page 17: ...er to Fig 18 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle MOTOR COMPRESSOR OIL LIQUID REFRIGERANT CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THRO...

Page 18: ...ration Check gas leakage Repair gas leak Replacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air 18 26 F Check heat load increase Unexpe...

Page 19: ...fan motor Regular but fails to start Replacement of compressor locking of rotor metal Improper thermostat setting Loose terminal connection Improper wiring Irregular motor resistance Irregular motor i...

Page 20: ...its on page 17 If not within limits call an electrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed...

Page 21: ...ation and replace Check wire locations If not per wiring diagram correct Check the capacitor Replace if not within 10 of manufacturers rating Replace if shorted open or damaged Check the compressor fo...

Page 22: ...ompressor to cycle Straighten the fins or replace the coil Test capacitor Check the terminals If loose repair or replace Check the system for a restriction If restricted clean or replace Close if open...

Page 23: ...23 4 SCHEMATIC DIAGRAM 4 1 CIRCUIT DIAGRAM SMPS MEZ62420710 250V T2A 250V T3 15A WIRING DIAGRAM...

Page 24: ...3 152302 147582 2 135312 349480 W48602 731273 C B 567480 W0CZZ 249950 238310 237200 A 264110 MO E D M I T R E W O P R E N A F D E E P S Fa n y g r e n E r e v a S Co ol Timer P M E T F F1 LOW F2 MED F...

Page 25: ...0112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302739 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERMISTOR ASSEMBLY 67307804 264110 POWE...

Page 26: ...980 SHROUD 67500112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302741 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERMISTOR ASSEMBLY 67307...

Page 27: ...0112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302740 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERMISTOR ASSEMBLY 67307804 264110 POWE...

Page 28: ...149980 SHROUD 67500112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302741 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERMISTOR ASSEMBLY 6...

Page 29: ...149980 SHROUD 67500112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302741 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERMISTOR ASSEMBLY 6...

Page 30: ...T MOTOR 67303606 149980 SHROUD 67500112 550140 DAMPER COMPRESSOR 67305000 152302 FILTER AIR 67500113 352380 AIR GUIDE 67302741 359012 FAN TURBO 67302607 559011 FAN ASSEMBLY AXIAL 67303202 567480 THERM...

Page 31: ...010 05 10 Printed in the U S A Post Office Box 1540 4200 N Pan Am Expressway San Antonio Texas 78295 1540 210 357 4400 FAX 210 357 4480 FRIEDRICH AIR CONDITIONING CO Visit our web site at www friedric...

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