85 PB
TROUBLESHOOTING
Normal Malfunction
Fig. 501
Troubleshooting Possible Reasons of Abnormality How to Deal With
Air conditioner will not start up
1. Power supply failure;
2. Circuit breaker tripped or fuse blown.
3. Power voltage is too low;
4. Improper setting of thermostat ;
5. Thermostat has lost power."
1. Check power supply circuit;
2. Measure insulation resistance to
ground to see if there is any leakage;
3. Check if there is a defective contact or
leak current in the power supply circuit;
4. Check and set thermostat again;
5. Change batteries."
The compressor starts or
stops frequently
The air inlet and outlet
have been blocked.
Remove obstacles.
Poor cooling/heating
1. The outdoor heat exchanger is dirty,
such as condenser;
2. There are heating devices indoors;
3. The airtightness is not enough, and
people come in and out too frequently;
4. Block of outdoor heat exchanger;
5. Improper setting of temperature."
1. Clean the heat exchanger of the
outdoor unit, such as condenser;
2. Remove heating devices;
3. Keep certain air tightness indoors;
4. Remove block obstacles;
5. Check and try to set
temperature again."
Sound from settling of parts
During system starting or
stopping, a sound might be heard.
However, this is due to the normal
settling of plastic parts.
It is not abnormal, and the
sound will disappear soon.
Water leakage
1. Drainage pipe is blocked or broken;
2. Wrap of refrigerant pipe joint
is not closed completely.
1. Change drainage pipe;
2. Re‑wrap and make it tight.
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