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Guides, Tips and Cautions
4. TROUBLE SHOOTING
The following may occur during normal operation, and may not indicate malfunction.
Case Explanation
Cooling or heating is delayed. A 3 ~ 5 minutes delay protects the compressor.
Fan speed changes – off, very slow and then normal Automatically happens in heating mode - prevents cold
air blowing onto occupants.
The heating operation stops suddenly and defrost-light
blinks.
Frost removal on outdoor unit is in progress (5 ~
10mins).
Mist coming out of the indoor unit May occur when unit temperature is low and room air
is hot and humid.
Low volume sounds are emitted by the air conditioner
“Hissing”: normal – gas pressure equalizing when
compressor stops or starts.
“Squeaking”: normal expansion and contraction of
plastic and metal parts.
Rushing air – normal when louver resets its position.
Dust discharges from the unit. May occur when air conditioner is used for the rst time
or has not been used for a long time.
Emits a peculiar odour. Usually caused by chemicals, cigarette smoke, cooking
etc. If not the case call your suitable contractor.
Changes to fan only while cooling or heating. Room temperature is the same as that selected with
the remote. If not the case call a suitable contractor.
Poor heating performance
May occur when outdoor temperatures are close to or
below zero degrees Celsius.
If not the case call a suitable contractor.
Turns on automatically Normal when power is restored after a power failure.
Operation is erratic, unpredictable or unresponsive.
Interference from cell phone towers and remote
boosters may cause the unit to malfunction.
Disconnect the power and then re-connect.
Press the ON/OFF button on the remote controller to
restart operation.
If the problem is not resolved call a suitable contractor.
The multi-system air conditioner can not be in different operating modes at the same time, such as one unit being
in the “COOL” mode and one unit being in the “HEAT” mode.
When conducting different operations, the “HEAT” mode will be given priority. The indoor unit which operates in
“COOL” or “FAN” mode will stop and display “P5”.
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