7
TROUBLESHOOTING - NORMAL OPERATION
The following may occur during the normal operation
of your unit.
1. Unit protection:
Compressor
•
There is a 3-minute compressor protection delay. Af-
ter the compressor stops operation, it will restart in 3
minutes.
•
The unit will blow cold air while in the HEAT mode,
when the indoor heat exchanger is in one of the follow-
ing situations and the set temperature has not been
reached:
a. When heating has just started.
b. While defrosting.
c. Low temperature setting.
•
The indoor or outdoor fan stops running when defrost-
ing (Heating models only).
Defrosting
(Heating models only)
•
Frost may accumulate on the outdoor unit during heat
cycle when the outdoor temperature is low and the
humidity is high, resulting in lower heating efficiency
of the unit. When this happens, the unit will stop heat-
ing operation and begin defrosting automatically.
Defrost time may vary from 4 to 10 minutes, depend-
ing on the outdoor temperature and the amount of frost
buildup on the outdoor unit.
2. A white mist coming out from the indoor unit.
•
This mist may generate due a large temperature differ-
ence between inlet air and outlet air, while in the COOL
mode in an indoor environment that has a high relative
humidity.
•
This mist may also be generated due to moisture from
the defrosting process (when the unit restarts in HEAT
mode after defrosting).
3. Faint noises coming from the unit.
•
A low hissing sound caused when the compressor is
running or has just stopped running. This is the sound
of the refrigerant flowing or coming to a stop.
•
A low “squeak”, when the compressor is running or
has just stopped running. This is caused by heat ex-
pansion and cold contraction of the plastic parts in the
unit, due to temperature changes.
•
When the unit is first turned on, you may hear the
louver returning to its original position.
4. Dust is blown from the unit.
This is a normal condition when the air conditioner has
not been used for a long time or during the first use of the
unit.
5. An unusual smell comes from the indoor unit.
This is caused by the indoor unit giving off smells ab-
sorbed from building material, furniture or smoke.
6. The air conditioner migrates to FAN ONLY mode from
HEAT or COOL mode.
When the indoor temperature reaches the temperature
setting on the unit, the compressor will stop automati-
cally and the unit turns to FAN only mode. The com-
pressor will resume when the indoor temperature rises
on COOL mode or falls on HEAT mode to the set point.
7. Dripping water may be generated on the surface of the
indoor unit when cooling in a high, relative humidity set-
ting (relative humidity higher than 80%). Adjust the hori-
zontal louver to the maximum air outlet position and se-
lect HIGH fan speed.
8. Heating mode
The air conditioner draws in heat from the outdoor unit
and releases it via the indoor unit during heating opera-
tion. When the outdoor temperature falls, heat drawn in
by the air conditioner decreases accordingly. At the same
time, heat loading of the air conditioner increases due to
larger difference between indoor and outdoor tempera-
ture. If a suitable temperature is not achieved by the air
conditioner, use of a supplemental heating device is sug-
gested.
9. Auto-restart function
Power failure during operation will stop the unit completely.
For unit without AUTO-RESTART, the OPERATION indi-
cator on the indoor unit starts flashing, when power is
restored. To resume operation, push the ON/OFF button
on the remote control.
For unit with AUTO-RESTART, the unit will resume auto-
matically with all the previous settings preserved by the
memory function, when power is restored.
10. Lightning or a wireless telephone operating nearby may
cause the unit to malfunction. Push the ON/OFF button
on the remote control to restart the operation.
