York YUHC 18-60 User Manual download pdf (Page 22)

22

ENGLISH

TROUBLE SHOOTING GUIDE

Problem Probable cause Remedy

A. The air conditioner does not

run.

1. Power failure.

2. Fuse blown or circuit breaker

open.

3. Voltage is too low.

4. Faulty contactor or relay.

5. Electrical connections loose.

6. Thermostat adjustment too low

(in heating mode) or too high (in

cooling mode).

7. Faulty capacitor.

8. Incorrect wiring, terminal loose.

9. Pressure switch tripped.

1. Wait for power resume.

2. Replace the fuse or reset the

breaker.

3. Find the cause and ﬁx it.

4. Replace the faulty component.

5. Retighten the connection.

6. Check thermostat setting.

7. Find the cause then replace ca

-

pacitor.

8. Check and retighten.

9. Find the cause before reset.

B. The outdoor fan runs but the

compressor will not start.

1. Motor winding cut or grounded.

2. Faulty capacitor.

1. Check the wiring and the com-

pressor winding resistance.

2. Find the cause then replace ca-

pacitor.

C. There is insufﬁcient heating

or cooling.

1. There is a gas leak.

2. Liquid and gas line insulated to-

gether.

3. The room was probably very hot

(cool) when you started the sys-

tem.

1. Remove charge, repair, evacu-

ate and recharge.

2. Insulate them separately.

3. Wait while unit has enough time

to cool the room.

D. The compressor runs con

-

tinuously.

1. Thermostat adjustment too low

(in heating mode) or too high (in

cooling mode).

2. Faulty fan.

3. Refrigerant charge too low, leak.

4. Air or incondensables in refriger

-

ant circuit.

1. Check thermostat setting.

2. Check condenser air circulation.

3. Find leak, repair and recharge.

4. Remove charge, evacuate and

recharge.

E. The compressor starts but

shuts down quickly.

1. Too much or too little refrigerant.

2. Faulty compressor.

3. Air or incondensables in refriger

-

ant circuit.

4. Changeover valve damaged or

blocked open (heat pump unit).

1. Remove charge, evacuate and

recharge.

2. Determine the cause and replace

compressor.

3. Remove charge, evacuate and

recharge.

4. Replace it.

F. Clicking sound is heard from

the air conditioner.

In heating or cooling operation any

plastic parts may expand or shrink

due to a sudden temperature change

in this event, a clicking sound may

occur.

In heating or cooling operation any

plastic parts may expand or shrink

due to a sudden temperature change

in this event, a clicking sound may

occur.

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