Panasonic cu-4ks24nbu User Manual

8-4-2. Inspection Points for Each Part

(1) Outdoor control circuit board

Refer to 8-3-1. Checking the outdoor unit.

(2) Fuse

Check it visually or the continuity with a tester.

(3) Compressor

Check for an open circuit in the compressor coil winding.

(4) Compressor protective sensor (compressor discharge temperature thermistor)

Check that the senseor is securely contained in the thermostart holder.

(5) Coil thermistor

Check that the sensor is securely contained in the thermostat holder.

Do not remove or insert the outdoor control circuit board connector when power is being supplied to it.

(The controller will be damaged.)

NOTE

Problems

Inspection

points

Indoor unit

Indoor unit does not operate.

Breaker

Refrigerant gas pressure

(8)

(9)

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit does not operate.

Outdoor fan dose not turn.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

increase.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Outdoor unit

Others

No. of
Inspection
Points for
Each part

Others