En-21
TROUBLESHOOTING
WARNING
In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical
breaker and consult authorized service personnel.
Merely turning off the unit’s power switch will not completely disconnect the unit from the power source.
Always be sure to turn off the electrical breaker to ensure that power is completely off.
Before requesting service, perform the following checks:
Symptom
Problem
See Page
NORMAL
FUNCTION
Doesn’t operate imme-
diately:
●
If the indoor 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.
—
Noise is heard:
●
During operation or immediately after stopping the unit, the sound
of water owing in the air conditioner’s piping may be heard. Also,
noise may be particularly noticeable for about 2 to 3 minutes after
starting operation (sound of refrigerant owing).
●
During operation, a slight squeaking sound may be heard. This is
the result of minute expansion and contraction of the front panel
due to temperature changes.
—
●
During Heating operation, a sizzling sound may be heard occasional.
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 the
result of room smells (furniture, tobacco, etc.) which have been
taken into the indoor unit.
—
Mist or steam is emit-
ted:
●
During Cooling or Dry operation, a thin mist may be seen emitted
from the indoor unit. This results from the sudden Cooling of room
air by the cool air emitted from the indoor unit, resulting in con-
densation and misting.
—
●
During Heating operation, the outdoor unit’s fan may stop, and
steam may be seen rising from the unit. This is due to Automatic
Defrosting operation.
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Air ow is weak or
stops:
●
When Heating operation is started, fan speed is temporarily very
low, to allow internal parts to warm up.
●
During Heating operation, if the room temperature rises above the
temperature setting, the outdoor unit will stop, and the indoor unit
will operate at very low fan speed. If you wish to warm the room
further, set the temperature for a higher setting.
—
●
During Heating operation, the indoor unit will temporarily stop
operation (Max.15 minutes) as the Automatic Defrosting mode op-
erates. During Automatic Defrosting operation, the OPERATION
Indicator Lamp will ash.
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●
During Dry mode, the indoor unit will operate at low speed; in or-
der to adjust room humidity, the indoor unit’s fan may stop from
time to time. Also, the fan may operate at very low speed when
adjusting room humidity.
8
●
During SUPER QUIET operation, the fan will operate at very low speed.
7
●
In the monitor of AUTO operation, the fan will operate at very low
speed.
8
●
In case of Multi-type unit, if multiple units are operated in different
operation modes as shown below, the units operated afterward will
stop and the OPERATION indicator lamp (green) will ash.
Heating mode and cooling mode (or Dry mode)
Heating mode and fan mode
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Water is produced
from the outdoor unit:
●
During Heating operation, water may be produced from the out-
door unit due to Automatic Defrosting operation.
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