TROUBLESHOOTING
WARNING! | In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the | ||||
electrical breaker and consult authorized service personnel. |
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| Merely turning off the unit’s power switch will not completely disconnect the unit from the power | ||
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| source. Always be sure to turn off the electrical breaker to ensure that power is completely off. | ||
Before requesting service, perform the following checks: |
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| Symptom | Problem | See Page |
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NORMAL | Doesn’t operate immedi- | ● If the indoor unit is stopped and then immediately started |
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FUNCTION | ately: |
| again, the compressor will not operate for about 3 minutes, in |
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| order to prevent fuse blowouts. | — |
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| ● Whenever the electrical breaker is turned off then on again the | |
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| protection circuit will operate for about 3 minutes, preventing |
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| unit operation during that period. |
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| Noise is heard: | ● During operation or 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 |
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| 3 minutes after starting operation (sound of refrigerant flowing). | — |
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| ● During operation, a slight squeaking sound may be heard. This | |
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| is the result of minute expansion and contraction of the front |
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| panel due to temperature changes. |
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| ● During Heating operation, a sizzling sound may be heard occasion- | 16 |
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| al. This sound is produced by the Automatic Defrosting operation. | |
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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 indoor unit. |
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| Mist or steam is | ● During Cooling or Dry operation, a thin mist may be seen emit- |
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| emitted: |
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| ted from the indoor unit. This results from the sudden Cooling | — | |||
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| of room air by the cool air emitted from the indoor unit, result- | |
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| ing in 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 Automat- | 16 |
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| ic Defrosting operation. |
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| Airflow is weak or stops: | ● When Heating operation is started, fan speed is temporarily |
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| very 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 in- |
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| door unit will operate at very low fan speed. If you wish to |
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| warm the room further, set the thermostat for a higher setting. |
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| ● During Heating operation, the indoor unit will temporarily stop |
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| operation (between 7 and 15 minutes) as the Automatic Defrost- | 16 |
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| ing mode operates. During Automatic Defrosting operation, the |
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| OPERATION Indicator Lamp will flash. |
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| ● During Dry mode, the indoor unit will operate at low speed; in |
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| order to adjust room humidity, the indoor unit’s fan may stop | 7 |
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| from time to time. Also, the fan may operate at very low speed | |
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| when adjusting room humidity. |
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| ● During SUPER QUIET operation, the fan will operate at very low speed. | 6 |
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| ● In the monitor of AUTO operation, the fan will operate at very | 7 |
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| low speed. |
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| ● In case of |
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| operation modes as shown below, the units operated afterward | 17 |
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| will stop and the OPERATION indicator lamp (green) will flash. |
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| Heating mode and cooling mode (or dry mode) |
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| Heating mode and fan mode |
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| Water is produced from | ● During Heating operation, water may be produced from the | 16 | ||
| the outdoor unit: | outdoor unit due to Automatic Defrosting operation. |
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