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5-2-2.

Check PUSH BUTTON in the indoor unit

B.  Circuit breaker trips in several minutes after turning the air conditioner on.

There is a possibility of short circuit.

6-2-2.  Neither indoor nor outdoor unit runs.

A. Power is not supplied.

B. Check "OPERATION selector" switch in the indoor unit.

YES

NO

• OPERATION selector switch is set 

in ON position.

Set OPERATION selector switch 
to ON.

Indoor PCB Ass'y is defective.

NO

• Check power supply. 

Power is being supplied to the 
indoor unit.

Circuit breaker 
is tripped.

Power failure

Reset breaker.

Wait for recovery 
or contact power 
company.

Replace with suitable
one (larger capacity).

NO

Check capacity of circuit breaker.

Capacity of circuit breaker is 
suitable.

Measure resistance of outdoor fan 
motor winding.

Measure resistance of compressor 
motor winding.

• Measure resistance of 4-way valve's  

winding.

In case of Heating operation :

Press the PUSH BUTTON switch

Neither the indoor nor the outdoor 
units run

5-2-2.

21

Summary of Contents for 387106985

Page 1: ...TECHNICAL DATA SERVICE MANUAL INDOOR UNIT CAF185R5 SPLIT SYSTEM AIR CONDITIONER 0 8180 418 0 07 2005 Model No Product Code No CAF185R5 387106985...

Page 2: ...w wiring to touch the refrigerant tubing compressor or any moving parts of the fan Do not use multi core cable when wiring the power supply and control lines Use separate cables for each type of line...

Page 3: ...Mode 13 4 7 Protections in Heat Mode 15 4 8 Sleep Function 18 4 9 Daily Timer 18 4 10 I FEEL Function 18 4 11 Drain Pump Operation 19 5 TROUBLESHOOTING 20 5 1 Check before and after troubleshooting 20...

Page 4: ...ensions Unit Height mm Width mm Depth mm Ceiling panel Height mm Width mm Depth mm Package dimensions Unit Height mm Width mm Depth mm Volume m3 Ceiling panel Height mm Width mm Depth mm Volume m3 Wei...

Page 5: ...ype Operating temp Open C Close C Run capacitor F VAC Flap Motor Type Model Rating No of poles rpm Nominal output W Coil resistance Ambient temp 20 C k Heat Exch Coil Coil Rows Fin pitch mm face area...

Page 6: ...stor Coil sensor TH1 Resistance Thermistor Room sensor TH2 Resistance Drain pump Model Rating Voltage Input Total head capacity Safety float switch Model Contact rating 10 5 10 3 PC 309564003 220 240V...

Page 7: ...2 DIMENSIONAL DATA Units mm 7...

Page 8: ...3 ELECTRICAL DATA 3 1 Electric Wiring Diagrams 8...

Page 9: ...4 1 Cool Mode Operation 4 FUNCTION 9...

Page 10: ...4 2 Heat Mode Operation 10...

Page 11: ...4 3 Auto Cool Heat Mode Operation 11...

Page 12: ...4 4 Dry Mode Operation 12...

Page 13: ...4 5 Fan Mode Operation 4 6 Protection operations in Cool and Dry Mode 1 Indoor Coil Defrost Protection 5 Protection Operations in Cool and Dry Modes 13...

Page 14: ...2 Outdoor Coil High Pressure Protection 14...

Page 15: ...4 7 Protection Operations in Heat Mode 1 Outdoor Coil Deice Protection 15...

Page 16: ...16...

Page 17: ...2 Indoor Coil High Pressure Protection in Heat Mode 17...

Page 18: ...4 8 Sleep Function 4 9 Daily Timer Function 4 10 IFEEL Function 18...

Page 19: ...ogic 0 and 1 at the float switch pins connector respectively For the Fujitsu version of MCU the Overflow and Normal condition are indicated by a logic 1 and 0 at the float switch pins connector respec...

Page 20: ...nect power or turn off circuit breaker before you start checking or servicing 5 5 1 5 1 1 5 1 2 5 1 3 5 1 4 5 2 Air conditioner does not operate 5 2 1 Circuit breaker trips or fuse blows A When the ci...

Page 21: ...to ON Indoor PCB Ass y is defective NO Check power supply Power is being supplied to the indoor unit Circuit breaker is tripped Power failure Reset breaker Wait for recovery or contact power company R...

Page 22: ...ary and secondary winding of transformer TR Indoor PCB Ass y is defective OK OK Measure resistance of indoor and outdoor fan motor winding FM Measure resistance of compressor motor winding CM OK Repla...

Page 23: ...ature by temperature setting button button Outdoor unit still does not run Remote control unit is defective Try to run using another remote control unit COOL OK NO Is room temperature too high Try to...

Page 24: ...tter in bearings Remove foreign matter or repair Repair or replace Measure resistance of outdoor fan motor winding Check fan motor capacitor Measure resistance of flap motor winding Fan cannot be turn...

Page 25: ...otor winding is abnormally high Refrigerant gas shortage Charge refrigerant gas Measure power supply voltage Rotor may be locked up The voltage is too low 5 3 4 Compressor and outdoor fan do not run F...

Page 26: ...emote control unit Receiver in lamp ass y may be defective may be defective Measure resistance of 4 way valve s winding COOL to HEAT Check voltage between Outdoor PCB ass y is defective terminals N an...

Page 27: ...rtage YES Check position of remote control unit Cool or warm air from air conditioner reaches position directly Change position of remote control unit Wide and narrow tubes between indoor unit and out...

Page 28: ...lampoon on the front side of the indoor unit will flash on and off when the thermistor is defective At the same time the outdoor unit will stop Indoor operate only for ventilation Temperature sensor...

Page 29: ...sulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate fig 2 Note that the ground line terminal should be skipped for the check 6 1 4 Mea...

Page 30: ...then place a probe on the capacitor terminals as shown in fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the maximum value The capacitor is go...

Page 31: ...R D 28 Reyrieux BP 131 01601 Tr voux CEDEX France T l 04 74 00 92 92 Fax 04 74 00 42 00 R C S Bourg en Bresse B 759 200 728...

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