Troubleshooting
| Improper set of temperature |
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| Adjust set temperature | |
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| If cooling (heating) load is |
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| Check the forecasted load of cooling (heating) |
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Malfunction of refrigerant flow
The refrigerant has leakage or is insufficient
Leakage between the high pres- sure and the low pressure in- side the compressor
Malfunction of four-way valve
heck and fill the leakage, then 
vacuumize it and supplement the re- frigerant as required
Replace the compressor
Replace the
COOL(HEAT) operation
Local block of capillary
Blockage of cooling system
Replace the capillary
Judge whether the system is blocked by observing the condensation of evapora- tor and the pressure value of the high pressure manometer and take measures to deal with the system.
Poor
Heat insulation for the connection |
| Make sure that heat insulation for the thick and thin pipes |
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pipes of the indoor unit and the out- |
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door unit is bad. |
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| joint andthe exposed part of the copper pipe . | |
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Block of outdoor heat ex- |
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| Clean the dust accumulated on the surface of | |
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changer |
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| the heat exchanger. | |
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Air circulation is insufficient
Air filter were blocked
Fan speed was set too slow
Fan rotation speed becomes
low
Clean the filter
To set the fan speed to high or middle speed
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| Replace the capaci- |
Capacitor |
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damage |
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Motor damage |
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| Replace the motor |
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The installation position of the |
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| Good ventilation must be provided for the | |
outdoor unit is not appropriate. | ||||
installation position of the outdoor unit. | ||||
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| Properly install the rainproof plate or the sunproof plate. If the |
The outdoor temperature is too high. |
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| maximum cool air still can not meet the requirement, it is sug- |
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| gested to replace the air conditioner. |
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The air tightness is not enough. People |
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| Keep certain air tightness indoors, try not to use |
come in and out too frequently. There |
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| electricalappliance with large quantity of heat | |
are heating devices indoors. |
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