Trouble Shooting - Carrier 42QZL018DS Bedienungshandbuch

4. TROUBLE SHOOTING

Please carry out the following check before making a service call.
CONCERN
Unit does not work at all
Poor cooling or heating
Guides, Tips and Casutions
The following may occur during normal operation, and may not indicate malfunction.
Case
Cooling or heating is delayed.
Fan speed changes – off , very slow and
then normal
The heating operation stops suddenly and
defrost-light blinks.
Mist coming out of the indoor unit
Low volume sounds are emitted by
the air conditioner
Dust discharges from the unit.
Emits a peculiar odour.
Changes to fan only while cooling or
heating.
Poor heating performance
Turns on automatically
Operation is erratic, unpredictable or
unresponsive.
PLEASE FIRST CHECK!
• Is there a power failure?
• Has a switch been turned off, a circuit breaker tripped or a fuse blown?
• Are the batteries in the remoter control fresh?
• Are the clock and timer on the remote set correctly?
• Are the temperature and mode settings correct?
• Are the air filters clean?
• Are the windows and doors closed?
• Is air flow unrestricted in & out of indoor & outdoor units?
• Is fan speed on high and louvers allowing maximum flow?
A 3 minute delay protects the compressor.
Automatically happens in heating mode - prevents cold air blowing onto
occupants.
Frost removal on outdoor unit is in progress (5 – 10mins).
May occur when unit temperature is low and room air is hot and humid.
"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.
May occur when air conditioner is used for the first time or has not been used for
a long time.
Usually caused by chemicals, cigarette smoke, cooking etc. If not the case call your
suitable contractor.
Room temperature is the same as that selected with the remote. If not the case call a
suitable contractor.
May occur when outdoor temperatures are close to or below zero degrees Celsius.
Normal when power is restored after a power failure.
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.
Explanation
GB-7 7