Fault Checkup - Carrier XCT7 Installations- Und Benutzerhandbuch

Fault Checkup

Please check the following when consigning repair service:
Symptoms
Water flow sound
Cracking sound
Terrible smell in outlet
air
Flashing operating
indicator
Awaiting indication
Sound in shutdown in-
door unit or white steam
or cold air
Clicking sound when
switching the air condi-
tioner on
Start or stop working
automatically
Failure to work
Bad cooling &
heating effects
In the following circumstances, immediately stop the operation, disconnect the manual supply switch
and contact the after-service personnel.
• When buttons are inflexible actuated;
• When fuse and breaker have been burnt;
• When there are foreign objects and water in the refrigerator;
• When it cannot be operated even after removing the operation of protective unit;
• When other abnormal conditions occur.
Reasons
Water flow sound can be heard when starting operation, during operation or immedi-
ately after stopping operation. When it starts to work for 2-3 minutes, the sound may
increase which is the flowing sound of refrigerant or the draining sound of condensed
water.
During operation, the air conditioner may make a cracking sound, which is caused
from the temperature changes or the slight dilation of heat exchanger.
The terrible smell, caused from walls, carpet, furniture, clothing, cigarette and cos-
metics, attaches on the conditioner.
When switching the unit on again after a power failure, turn on the manual power
switch .The operating indicator should flash.
It displays the awaiting indication as it fails to perform refrigerating operation while
other indoor units are in heating operation. When the operator sets it to the refrigerat-
ing or heating mode and the operation is opposite to the setting, the unit displays the
awaiting indication.
To prevent oil and refrigerant from blocking the shutdown of indoor units, refrigerant
flows and its the sound can be heard. Otherwise, when other indoor units perform
the heating operation, white steam may occur; during refrigerating operation, cold air
may appear.
When the air conditioner is switched on, a sound is made due to the resetting of the
expansion valve.
Check if it is in the state of Timer-ON and Timer-OFF.
Check if there is a power failure.
Check if the manual power switch is turned off.
Check if the supply fuse and breaker are disconnected.
Check if the protective unit is working.
Check if refrigerating and heating functions are selected simultaneously with
the awaiting indication on line control.
Check if air intake port and air outlet port of outdoor units are blocked.
Check if the door and windows are open.
Check if the filtering screen of air cleaner is blocked with sludge or dust.
Check if the setting of wind quantity is at low wind.
Check if the setting of operation is on the Fan Operation state.
Check if the temperature setting is proper.
6