En-4
TROUBLESHOOTING
The following conditions are not breakdowns or operation failures.
Symptom Problem See page
Doesn’t operate immediately: If the unit is stopped and then immediately started again, the compressor will not operate for about ●
3 minutes, in order to prevent fuse blowouts.
—
Whenever the electrical breaker is turned off then on again, the protection circuit will operate for ●
about 3 minutes, preventing unit operation during that period.
—
Airfl ow is weak or stops: When Heating operation is started, indoor unit’s fan may temporarily stop, to allow internal parts to ●
warm up.
—
During Heating operation, if the room temperature rises above the thermostat setting, the outdoor ●
unit will stop, and the indoor unit’s fan will stop. If you wish to warm the room further, set the ther-
mostat for a higher setting.
—
During oil recovery operation, the air fl ow may stop for approximately 10 minutes. ● 3
During Heating operation, the unit will temporarily stop operation (between 4 and 15 minutes) as ●
the Automatic Defrosting mode operates.
3
The fan may operate at low speed during Dry operation or when the unit is monitoring the room’s ●
temperature.
—
In the monitor AUTO operation, the fan will operate at low speed. ● —
Flashing lamps:
(Limited to only when receiver
unit is connected)
The Operation indicator lamp
(green) fl ashes:
An oil recovery operation is being performed.
3
The Operation indicator lamp
(green) fl ashes:
An automatic defrosting operation is being performed.
3
The Operation indicator lamp
(green) and Timer indicator lamp
(orange) are fl ashing alternately:
It has recovered from a power outage.
—
The Operation indicator lamp
(green) and Timer indicator lamp
(orange) are fl ashing simultane-
ously:
It is operating in trial operation mode.
Ask a manager as there may be maintenance being conducted.
—
The Operation indicator lamp
(green) lights up and the Timer
indicator lamp (orange) fl ashes:
This is the standby state.
3
Noise is heard: In the following conditions there are sounds of water fl owing from the indoor unit and the operation ●
sound becomes loud. These are the sounds of the fl owing of refrigerant.
When operation starts
When oil recovery operation fi nishes
When automatic defrosting operation fi nishes
—
During operation, a slight squeaking sound may be heard. This is the result of minute expansion ●
and contraction of the panel due to temperature changes.
—
During Heating operation, a sizzling sound may be heard occasionally. This sound is produced by
●
the Automatic Defrosting operation.
3
Smells: Some smell may be emitted from the indoor unit. This smell is the result of room smells (furniture, ●
tobacco, etc.) which have been taken into the air conditioner.
—
Fog comes out of the indoor unit: During Cooling operation, a thin mist may be seen emitted from the indoor unit. This results from ●
the sudden Cooling of room air by the air emitted from the air conditioner, resulting in condensation
and misting.
—
Steam comes out of the indoor
unit:
During Heating operation, the outdoor unit’s fan may stop, and steam may be seen rising from the ●
unit. This is due to the Automatic Defrosting operation.
3
Water is produced from the
outdoor unit:
During Heating operation, water may be produced from the outdoor unit due to the Automatic ●
Defrosting operation.
—
9374343126-01_OM.indb 49374343126-01_OM.indb 4 2012-6-15 9:13:052012-6-15 9:13:05
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