TROUBLESHOOTING
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| In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the | |
WARNING! | |||
Power Supply Plug, 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 | |
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| power source. Always be sure to disconnect the Power Supply Plug or turn off your circuit | |
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| breaker 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 Power Supply Plug is disconnected and then re- | |
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| connected to a power outlet, the protection circuit will operate for |
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| about 3 minutes, preventing unit 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 occasionally. | 17 |
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| 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 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 | 17 |
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| steam may be seen rising from the unit. This is due to the Auto- | |
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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 | 17 |
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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 | 5 |
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| when the unit is monitoring the room’s temperature. | |
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| ● During SUPER QUIET operation, the fan will operate at very low | 5 |
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| speed. | |
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| ● In the monitor AUTO operation, the fan will operate at very low | 5 |
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| speed. | |
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| ● In case of |
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| ent operation modes as shown below, the units operated after- |
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| ward will stop and the OPERATION indicator lamp (red) will flash. | 18 |
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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 out- | 17 |
| the outdoor unit: | door unit due to the Automatic Defrosting operation. | |
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| The AIR CLEAN indicator | ● After approximately 400 hours of Air Cleaning Mode use, the AIR |
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| lamp (green) will begin to | CLEAN indicator lamp will begin to flash slowly (as shown in the | 13 - 14 |
| slowly flash (as shown in | figure). When this occurs, please stop the system, remove the | |
| the figure): | mains socket and carry out maintenance on the dust collecting |
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| unit’s air filter. |
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| The AIR CLEAN indicator | ● After approximately 500 hours of Air Cleaning Mode use, the AIR |
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| lamp (green) will begin to | CLEAN indicator lamp will begin to flash quickly (as shown in the |
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| flash quickly (as shown in | figure). At this point, Air Cleaning will stop functioning. Please | 13 - 14 |
| the figure): | stop the system, remove the mains socket and carry out mainte- |
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| nance on the dust collecting unit’s air filter. |
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