Troubleshooting
WARNING
In the event of a malfunction such as burning smell, immediately stop operation of the air conditioner, and disconnect all the power supply by turning off the electrical breaker or disconnecting the power plug. Then consult authorized service personnel.
As long as the unit is connected to the power supply, it is not insulated from the power supply even if the unit is turned off.
Following symptoms do not indicate the product malfunction, but they are normal functions or characteristics of this product.
Symptom | Cause | See page | |
Operation is delayed after | To prevent blowout of the fuse, the compressor will not operate during the protection circuit is working | – | |
restart. | for about 3 minutes after sudden OFF→ON operation of the power supply. | ||
| |||
Noise is heard. | • During the operation or immediately after stopping the air conditioner, refrigerant flowing sound |
| |
| may be heard. And it is particularly noticeable for | – | |
| • During the operation, a slight squeaking sound produced by the minute expansion and contraction | ||
|
| ||
| of the front panel caused by temperature change may be heard. |
| |
|
|
| |
| During heating operation, a sizzling sound produced by the automatic defrosting operation may be | 4 | |
| heard. | ||
|
| ||
Smell coming from the unit. | Absorbed room smell generated from interior textile, furniture, or cigarette smoke into the air condi- | – | |
| tioner may be emitted. | ||
|
| ||
Mist or steam is emitted from | In COOL or DRY mode, a thin mist generated by condensation formed with sudden cooling process | – | |
the unit. | may be emitted. | ||
| |||
| During heating operation, the fan | 4 | |
| the automatic defrosting operation may be seen. | ||
|
| ||
Airflow is weak or stops. | • Immediately after the heating operation is started, the fan speed stays temporarily very low to warm |
| |
| up the internal parts of the unit. | – | |
| • In HEAT mode, the outdoor unit stops and the indoor unit operates at very low fan speed if the | ||
|
| ||
| room temperature rises above the set temperature. |
| |
|
|
| |
| In HEAT mode, the indoor unit temporarily stops for maximum of 15 minutes to perform the automatic | 4 | |
| defrosting operation while the OPERATION indicator is flashing. | ||
|
| ||
| In DRY mode, the indoor unit operates at low fan speed to adjust the room humidity, and may stop | – | |
| from time to time. | ||
|
| ||
| When the fan speed is set to “QUIET”, the fan rotates at very low speed and the airflow is reduced. | – | |
|
|
| |
| When monitoring operation is performed in AUTO mode, the fan rotates at very low speed. | – | |
|
|
| |
Outdoor unit emits water. | During heating operation, the outdoor unit may emit water generated by the automatic defrosting | – | |
| operation. | ||
|
| ||
Before you call for or request servicing, troubleshoot a problem by performing following checks: |
| ||
|
|
| |
Symptom | Diagnostic | See page | |
Does not operate at all. | Has the circuit breaker been turned off? | – | |
| Has there been a power outage? | ||
| Has a fuse blown out or the circuit breaker been tripped? |
| |
| Is the timer operating? | 3, 4 | |
|
|
| |
Poor cooling or heating perfor- | Is the air filter dirty? | 5 | |
mance. |
|
| |
Is the intake grill or outlet port of indoor unit blocked? | – | ||
| |||
|
|
| |
| Is the room temperature adjusted appropriately? | 3 | |
|
|
| |
| Is a window or door left opened? |
| |
| Is direct or strong sunlight shinning into the room in cooling operation? | – | |
| Are there other heating apparatus or computers operating, or too many people in the room in cool- | ||
|
| ||
| ing operation? |
| |
|
|
| |
| Is the fan speed set to “QUIET”? | 3 | |
|
|
| |
The unit operates differently | Are the batteries used in the remote controller exhausted? |
| |
from the remote controller | Are the batteries used in the remote controller loaded properly? | 2 | |
setting. |
|
| |
Immediately stop operation and turn off the electrical breaker in following cases. Then consult authorized service personnel.
•The problem persists even if you perform these checks or diagnostics.
•The OPERATION indicator and TIMER indicator blink while the ECONOMY indicator is blinking fast.
Operating Range
| COOL/DRY mode | HEAT mode |
Outdoor temperature | 15 to 115 °F | 15 to 75 °F |
Indoor temperature | 64 to 90 °F (18 to 32 °C) | 60 to 88 °F (16 to 30 °C) |
Indoor humidity | 80 % or less | _ |
|
