Problems
Inspection
points
Others | Breaker |
Refrigerant gas pressure |
| Indoor unit |
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| Outdoor unit |
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Indoor unit does not operate. |
| 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 outdoor air temperature is high, however defrost operation occurs. | Defrost operation does not occur. | The electric expansion valve does not operate. | Does not cool or cooling performance is inadequate. | Does not heat or heating performance is inadequate. | |
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No. of Inspection Points for Each part
(9)
(10)
8-4-2. Inspection Points for Each Part
(1) Outdoor control circuit board
Refer to
NOTE 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) 4-way valve
(6) Coil thermistor
Check that the sensor is securely contained in the thermostat holder.
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