York MLCA-MLHA-07-24 User Manual

EN

A. The air conditioner does not run.

1. Power failure.

1. Wait for power resume.

2. Fuse blown or circuit breaker

2. Replace the fuse or reset the

open.

breaker.

3. Voltage is too low.

3. Find the cause and fix it.

4. Faulty contactor or relay.

4. Replace the faulty component.

5. Electrical connections loose.

5. Retighten the connection.

6. Thermostat adjustment too low

6. Check thermostat setting.

(in heating mode) or too high
(in cooling mode).

7. Faulty capacitor.

7. Find the cause then replace

capacitor.

8. Incorrect wiring, terminal loose.

8. Check and retighten.

9. Pressure switch tripped.

9. Find the cause before reset.

B. The outdoor fan runs but the

1. Motor winding cut or grounded.

1. Check the wiring and the

    compressor will not start.

compressor winding resistance.

2. Faulty capacitor.

2. Find the cause then replace

capacitor.

C. There is insufficient heating or

1. There is a gas leak.

1. Remove charge, repair, evacuate

    cooling.

and recharge.

2. Liquid and gas line insulated

2. Insulate them separately.

together.

3. The room was probably very hot

3. Wait while unit has enough time to

(cool) when you started the

cool the room.

system.

D. The compressor runs continuously. 1. Thermostat adjustment too low

1. Check thermostat setting.

(in heating mode) or too high
(in cooling mode).

2. Faulty fan.

2. Check condenser air circulation.

3. Refrigerant charge too low, leak.

3. Find leak, repair and recharge.

4. Air or incondensables in

4. Remove charge, evacuate and

refrigerant circuit.

recharge.

E. The compressor starts but shuts

1. Too much or too little refrigerant.

1. Remove charge, evacuate and

    down quickly.

recharge.

2. Faulty compressor.

2. Determine the cause and replace

compressor.

3. Air or incondensables in

3. Remove charge, evacuate and

refrigerant circuit.

recharge.

4. Changeover valve damaged or

4. Replace it.

blocked open (heat pump unit).

F. Clicking sound is heard from

In heating or cooling operation any

In heating or cooling operation any

the air conditioner.

plastic parts may expand or shrink

plastic parts may expand or shrink due

due to a sudden temperature change

to a sudden temperature change in this

in this event, a clicking sound may

event, a clicking sound may occur.

occur.

J199.pmd

31/03/2005, 9:54 PM

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