7.Trouble shooting
Before you ask for repair service, check the following points:
State of Machine | Cause | Troubleshooting | ||
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| Power failure. | Press the [ON/OFF] button after power restoration. | |
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It does not run. | The power supply is turned OFF. | Turn the power supply ON. | ||
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The fuse in the power supply is gone. | Replace fuse. | |||
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| The earth leakage breaker is gone. | Put in the earth leakage breaker. | |
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Air flows out but it does not cool or heat | Improper temperature adjustment. | After checking the set temperature. | ||
enough. |
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| The filter is filled with dust and dirt. | Clean up the filter. | |
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| There are some obstacles at the air inlet and | Remove. | |
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| outlet of the units. | ||
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| Windows and doors are open. | Close. | |
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| Insufficient refrigerant charge. | Contact with your installing contractor. | |
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Cool or warm air does not come out. | The | Wait for a while. | ||
(To protect the compressor, a | ||||
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| 3 minutes. | preventing circuit is built into the unit. | |
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| Therefore, there are occasions sometimes when | |
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| the compressor does not start running immediately. | |
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| There are cases when it does not run for as long | |
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| as 3 minutes.) | |
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| Indoor unit operation was started anew during | Wait for a while. | |
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| the heating and defrosting operation. | (Heating operation starts after ending defrosting | |
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| (5 10 HP only) | operation.) | |
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Fan runs but compressor do not run. | The set temperature of thermostat is | For temperature control, | ||
excessively high for cooling. | decrease the set temperature at cooling. | |||
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| excessively low for heating. (PEH only) | increase the set temperature at heating. (PEH only) | |
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| The room temperature is | Can not be operated as it is out of temperature | |
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| excessively low for cooling. | control range. | |
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| excessively high for heating. (PEH only) |
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Fan runs but stops immediately. | Air outlet and inlet are blocked. | Remove blocking matter. | ||
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Fogged white steam is discharged from | When the indoor temperature and humidity are | It is not a breakdown. | ||
the indoor unit. | high, such a phenomenon is occasionally had | Please use as it is. | ||
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| at the beginning of system operation. |
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Water or steam is discharged from the | At cooling, water which places to cooling piping | It is not a breakdown. | ||
outdoor unit. | and piping connection part drops. | Please use as it is. | ||
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| When heating, water which places to the heat |
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| exchanger drops. (PEH only) |
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On heating, the air flow stops although a set | Frost adheres to the outdoor coil when the | It is not a breakdown. | ||
temperature is not reached. (PEH only) | temperature on the outside is low and humidity | Please use as it is. | ||
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| is high. This frost is melted. |
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