Haier AB072MRERA - Page 145

One way cassette
type indoor unit
137
6.9.4 Fault checkup
Please check the following when consigning repair service:
All these are not problems
Symptoms Reasons
Water ow sound
Water ow sound can be heard when starting operation, during
operation or immediately after stopping operation. When it starts to
work for 2-3 minutes, the sound may become louder, which is the
owing sound of refrigerant or the draining sound of condensed
water.
Cracking sound
During operation, the air conditioner may make the cracking sound,
which is caused from the temperature changes or the slight dilation
of heat exchanger.
Terrible smell in outlet air
The terrible smell, caused from walls, carpet, furniture, clothing,
cigarette and cosmetics, attaches on the conditioner.
Flashing operating indicator
When switching it on again after power failure, turn on the manual
power switch and the operating indicator ashes.
Awaiting indication
It displays the awaiting indication as it fails to perform refrigerating
operation while other indoor units are in heating operation. When the
operator set it to the refrigerating or heating mode and the operation
is opposite to the setting, it displays the awaiting indication.
Sound in shutdown indoor unit or
white steam or cold air
To prevent oil and refrigerant from blocking the shutdown indoor
units, refrigerant ows in the short time and make the sounds of
refrigerant owing. Otherwise, when other indoor units performs
heating operation, white steam may occur; during refrigerating
operation, cold air may appear.
Clicking sound when switching the
air condition on
When the conditioner is powered on, the sound is made due to the
resetting of the expansion valve.
Please make another check.
Start or stop working automatically Check if it is in the state of Timer-ON and Timer-OFF.
Failure to work
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.
Bad cooling & heating effects
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 ltering 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 at the Fan Operation state.
Check if the temperature setting is proper.
Under the following circumstances, immediately stop the operation, disconnect the manual supply switch and
contact the after-service personnel.
■ When buttons are inexible actuated;
■ When fuse and breaker have been burnt over and over;
■ When there are foreign objects and water in the refrigerator;
■ When it cannot still be operated after removing the operation of protective unit;
■ When other abnormal conditions occur.