Error detection
CAUTION
Inappropiate operation can lead to personal injury or unit malfunction.
• If a malfunction is detected, shut off the main power supply switch. Contact your distributor or
service agent. If the unit continues to operate under the malfunction condition, the unit could
suffer damages or cause fire or electric shock.
• Do not try to move the units. Contact your service agent or installer for needed repairs or to
relocate the units.
• Verify the following points before calling your distributor.
Condition
Possible cause
The unit does not work
When activating the unit
The overload protector delays the unit startup during
three minutes
When applying power
The keeps on standby during one minute
Mist is observed coming from the
unit
When starting the cooling cycle
High indoor humidity cools rapidly
Noise coming from the unit
Cracking noise at unit startup
This sound occurs during the activation of the electronic
expansion valve
Noise during cooling
Sound of refrigerant gas flowing through the unit
Noise at unit startup and and also
when stopping
This sound occurs when refrigerant gas starts flowing
or stops flowing.
Slight noise during unit operation
of after ending operation
Sound of the drain system during unit operation
Cracking sound during operation
and after operation
This sound ocurrs when the unit panels expand or
contract due to change in temperature
Unit expels dust
When the unit has been inactive
during a long period
Dust is expelled from the indoor unit
Unit expels an odor
When the unit is in operation
The room odor absorbed by the unit is expelled once
again
Unit continues to run after it has
been shut off
After the idoor unit receives the
"stop" sign, the fan continues to
run
The indoor fan motor will continue to run during 20-70
seconds to employ excess cooling or heating and to
prepare for the following operation
Mode conflict
COOL or HEAT mode cannot be
operated
When switching cooling and heating modes, the oudoor
unit will take a few minutes to change the direction of
refrigerant flow and to pre-heat the coil in heating mode.
COOL mode will not conflict with DRY mode nor with
FAN mode
Error code
E7 appears on one or more
indoor units
E7 indicates that this indoor unit is soliciting a mode
that conflicts with the outdoor unit mode. E7 will
disappear a few seconds later once the unit mode
changes to engage the oudoor unit mode. The oudoor
unit mode will change only when all indoor units have
changed to the new mode
NOTE:
If problem persists after attending and adopting the approporiate measures for the above indications, shut the
unit off immediately and contact your local service agency. Diagnostics and repairs must be performed by authorized
service technicians.
45
Wall Unit
Summary of Contents for 4MXW1609A1
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