Owner’s Manual -
B-VMH18,24UU-1
8
Symptom 2: Change into the fan mode during
cooling mode
Symptom 3: White mist comes out of a unit
Symptom 4: Noise of air conditioner’s cooling
In order to prevent the indoor evaporator frosting, the system
will change into fan mode automatically,
and
restore to the
cooling mode after
the indoor coil warms above freezing
.
When the room temperature drops to the set temperature, the
compressor goes off and the indoor unit changes to fan mode;
when the temperature rises up, the compressor starts again. It
is same in the heating mode.
Symptom 3.1: Indoor unit
Symptom 3.2: Indoor unit, outdoor unit
Symptom 4.1: Indoor unit
When humidity is high during cooling operation If the interior of
an indoor unit is extremely contaminated, the temperature
distribution inside a room becomes uneven. It is necessary to
clean the interior of the indoor unit. Ask your dealer for details
on cleaning the unit. This operation requires a qualified
service
p
erson
When the system is changed over to heating operation after
defrost operation Moisture generated by defrost becomes
steam and is exhausted.
A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop.
When the drain pump (optional accessories) is in operation,this
noise is heard.
A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation.
Expansion and contraction of plastic parts caused by
temperature change make this noise.
Symptom 4.2: Indoor unit, outdoor unit
A continuous low hissing sound is heard when the system is in
operation.
This is the sound of refrigerant gas flowing through both indoor
and outdoor units.
A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation.
This is the noise of refrigerant caused by flow stop or flow
change.
Symptom 4.3: Outdoor unit
When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 5: Dust comes out of the unit
Symptom 6: The units can give off odours
When the unit is used for the first time in a long time.
This is because dust has gotten into the unit.
The unit can absorb the smell of rooms, furniture, cigarettes,
etc., and then emit it again.
Symptom 7: The outdoor unit fan does not
spin.
During operation. The speed of the fan is controlled in order to
optimize product operation.
The operation lamp is flashing rapidly (5Hz) This lamp is still
flashing rapidly after turn off the power and turn on again.
(See in Table 8-1)
Remote controller receives malfunction or the button does not
work well.
A safety device such as a fuse, a breaker frequently actuates.
Obstacles and
/or
water enter the unit.
Water leaks from indoor unit.
Other malfunctions.
8.
TROUBLESHOOTING
8.1 Troubles and causes of air conditioner
If one of the following malfunctions occur, stop operation,
shut off the power, and contact your dealer.
If the system does not properly operate except the above
mentioned cases or the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
(See in Table 8-2)
8.2 Troubles and causes of remote controller
Before asking for serv
ice
or repairing, check the following
points.
(See in Table 8-3)
