technical & service manual dc inverter multi-system air ... - Panasonic

8-4-2. Inspection Points for Each Part
(1) Outdoor control circuit board
Refer to 8-3-1. Checking the outdoor unit.
NOTE
Others
Inspection
points
Breaker
Problems
Refrigerant gas pressure
Indoor unit
Do not remove or insert the outdoor control circuit board connector when power is being supplied to it.
(The controller will be damaged.)
(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.
Indoor unit does not operate.
Operation lamp blinking.
Operation lamp does not illuminate.
Indoor fan dose not turn.
Outdoor unit does not operate.
75
Outdoor fan dose not turn.
Outdoor unit Others
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.
No. of
Inspection
Points for
Each part
(8)
(9)