TROUBLESHOOTING
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the elec-
WARNING! trical breaker or disconnect the power supply plug, and consult authorized service personnel. Merely turning off the unit’s power switch will not completely disconnect the unit from the power source. Always be sure to turn off the electrical breaker or disconnect the power supply plug to ensure that power is completely off.
Before requesting service, perform the following checks:
| Symptom | Problem | See Page |
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NORMAL | Doesn’t operate immedi- | ● If the unit is stopped and then immediately started again, the com- |
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FUNCTION | ately: | pressor will not operate for about 3 minutes, in order to prevent |
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| fuse blowouts. |
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| ● Whenever the electrical breaker is turned off then on again or the | — |
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| power supply plug is disconnected and then reconnected, the pro- |
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| tection circuit will operate for about 3 minutes, preventing unit |
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| operation during that period. |
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| Noise is heard: | ● During operation and immediately after stopping the unit, the |
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| sound of water flowing in the air conditioner’s piping may be |
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| heard. Also, noise may be particularly noticeable for about 2 to 3 |
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| minutes after starting operation (sound of coolant flowing). | — |
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| ● During operation, a slight squeaking sound may be heard. This is |
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| the result of minute expansion and contraction of the front cover |
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| due to temperature changes. |
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| *● During Heating operation, a sizzling sound may be heard occa- |
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| sionally. This sound is produced by the Automatic Defrosting op- | 15 |
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| eration. |
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| Smells: | ● Some smell may be emitted from the indoor unit. This smell is |
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| the result of room smells (furniture, tobacco, etc.) which have | — |
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| been taken into the air conditioner. |
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| Mist or steam are | ● During Cooling or Dry operation, a thin mist may be seen emitted |
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| emitted: | from the indoor unit. This results from the sudden Cooling of | — |
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| room air by the air emitted from the air conditioner, resulting in | |
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| condensation and misting. |
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| *● During Heating operation, the outdoor unit’s fan may stop, and |
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| steam may be seen rising from the unit. This is due to the Auto- | 15 |
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| matic Defrosting operation. |
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| Airflow is weak or stops: | *● When Heating operation is started, fan speed is temporarily very |
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| low, to allow internal parts to warm up. |
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| *● During Heating operation, if the room temperature rises above | — |
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| the thermostat setting, the outdoor unit will stop, and the indoor | |
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| unit will operate at very low fan speed. If you wish to warm the |
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| room further, set the thermostat to a higher setting. |
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| *● During Heating operation, the unit will temporarily stop opera- |
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| tion (between 7 and 15 minutes) as the Automatic Defrosting mode | 15 |
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| operates. During the Automatic Defrosting operation, the OPERA- | |
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| TION indicator lamp will flash. |
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| ● The fan may operate at very low speed during Dry operation or | 6 |
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| when the unit is monitoring the room’s temperature. | |
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| ● In the monitor AUTO operation, the fan will operate at very low | 6 |
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| speed. | |
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| Water is produced from | *● During Heating operation, water may be produced from the out- | 15 |
| the outdoor unit: | door unit due to the Automatic Defrosting operation. | |
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