Troubleshooting; Before Calling For Service - Sharp CV-10NH Installation And Operation Manual

BEFORE CALLING FOR SERVICE

If the unit appears to be malfunctioning, check the following points before calling
for a service.
AIR CONDITIONER DOES NOT OPERATE AT ALL
• Is the unit plugged in or is the plug loose?
• Has the fuse blown or is the circuit breaker tripped?
• Did you restart the unit within 3 minutes of a power failure?
If the power was off for less than 3 minutes when, you restarted the air conditioner, a protective
device may cause the compressor to shut off, preventing cooling for about 5 minutes.
• Are the OPERATION, TIMER and MEGA COOL lamps blinking?
The water tank inside the unit is full. It must be drained. (See page26)
• Check the power plug. (See page16)
AIR CONDITIONER DOES NOT COOL PROPERLY
• Is it set to FAN, DEHUMIDIFICATION or VENTILATION mode?
Cooling does not take place in these modes. Change the MODE setting.
• Are the fi lters clogged with dust?
Clean and replace the fi lters.
• Is the cooling coil frozen?
No air will blow out if the cooling coil is frozen.
Run the air conditioner in FAN mode with the fan speed set to "HIGH" until all ice dissipates.
• Is the temperature set properly?
• Is the window exposed to direct sunlight?
Close the curtains or blinds to minimize solar energy heating the room.
• Is the exhaust hose too long?
For effi cient operation, make the hose as short as possible. The exhaust hose must not be twisted
or bent.
SOUNDS
• The unit may seem rather loud for the fi rst 2 to 3 minutes when the unit is turned on. This is the
sound of the compressor starting-up and is perfectly normal.
• A soft, swishing noise can be heard immediately after the unit is turned on or off, and also during
operation. This is the sound of the refrigerant fl owing inside the unit.
• This air conditioner evaporates water condensed during cooling operation within the unit through
the exhaust air outlet. Although water fl owing sound way be heard, this is normal.
• An audible gurgling sound may be heard for about a minute upon starting AUXILIARY mode. This
is sound of running drainage pump inside the unit.
• An audible gurgling sound may be heard when the unit is operated on a gently sloping
fl oor. Place the unit on a level fl oor.
TIMER DOES NOT WORK PROPERLY
• If a power failure occurs while the TIMER is set, the TIMER setting will be cancelled and will not
be retrieved even after the power is restored. This is normal for this unit.
THE UNIT FAILS TO REACT TO THE REMOTE CONTROL SIGNAL
• Check the batteries in the remote control. Replace if necessary.
• Try to send the signal again with the remote control pointed directly at the unit's signal receiver
window.
• Check whether the remote control batteries are installed with the polarities properly aligned.
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