Before Calling For Service - Sharp AE-M18AE-T Operation Manual

BEFORE CALLING FOR SERVICE

The following conditions do not denote equipment malfunctions
UNIT DOES NOT OPERATE
The unit will not operate if it is
turned on immediately after it is
turned off. The unit will not operate
immediately after the mode is
changed. This is to protect the
internal mechanisms. Wait 3
minutes before operating the unit.
UNIT DOES NOT SEND OUT
WARM AIR
The unit is preheating or de-icing.
ODORS
Carpet and furniture odors that en-
tered into the unit and the air condi-
tioner's inner component odors at
the early stage of installation may
be sent out from the unit.
CRACKING NOISE
The unit may produce a cracking
noise. This sound is generated by
the friction of the front panel and
other components expanding or
connecting due to a temperature
change.
If the unit appears to be malfunctioning, check the following points before calling for
service.
IF THE UNIT FAILS TO OPERATE
Check to see if the circuit breaker has tripped or the fuse has blown.
IF THE UNIT FAILS TO COOL OR HEAT THE ROOM EFFECTIVELY
Check the filters. If dirty,
clean them.
Make sure windows and
doors are closed tightly.
SWISHING NOISE
The soft, swishing noise is the sound of the
refrigerant flowing inside the unit.
WATER VAPOUR
» In the COOL and DRY operation, water
vapour can sometimes be seen at the air
outlet due to the difference between the
room air temperature and the air dis-
charged by the unit.
» In the HEAT operation, water vapour may
flow out of the outdoor unit during de-
icing.
UNIT DOES NOT OPERATE IN YOUR
REQUESTED MODE
» When one indoor unit is operating in
COOL mode, you can not operate the
other unit in HEAT mode. (OPERATION
lamp (
( ) will blink and HEAT mode operation
will not start.)
» When one indoor unit is operating in
HEAT mode, you can not operate the
other unit in COOL nor DRY mode. (OP-
ERATION lamp (
BUSY lamp (
fan will rotate.)
Check the outdoor unit to
make sure nothing is
blocking the air inlet or
outlet.
A large number of people
in the room can prevent
the unit from achieving the
desired temeperature.
E-15
) will light up, but BUSY lamp
) will light up, but
) will blink and only the
Check the thermostat is
for proper setting.
Check whether any
heat-generating appli-
ances are operating in
the room.