Mitsubishi Electric CITY MULTI PKFY-NBMU-E2 Manuel D'utilisation page 18

11. Trouble Shooting
Having trouble?
Water or vapor is emitted from the outdoor unit.
The operation indicator does not appear in the remote controller display.
The air conditioner does not operate even though the ON/OFF but-
ton is pressed. The operation mode display on the remote controller
disappears.
" " appears in the remote controller display.
When restarting the air conditioner soon after stopping it, it does not
operate even though the ON/OFF button is pressed.
Air conditioner operates without the ON/OFF button being pressed.
Air conditioner stops without the ON/OFF button being pressed.
Remote controller timer operation cannot be set.
"PLEASE WAIT" appears in the remote controller display.
An error code appears in the remote controller display.
Draining water or motor rotation sound is heard.
Noise is louder than specifications.
Nothing appears in the wireless remote controller display, the display
is faint, or signals are not received by the indoor unit unless the remote
controller is close.
The operation lamp near the receiver for the wireless remote controller
on the indoor unit is blinking.
Warm air blows from the indoor unit intermittently when heating mode
is off or during fan mode.
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Here is the solution. (Unit is operating normally.)
During cooling mode, water may form and drip from the cool pipes and
joints.
During heating mode, water may form and drip from the heat exchang-
er.
During defrosting mode, water on the heat exchanger evaporates and
water vapor may be emitted.
Turn on the power switch. " " will appear in the remote controller
display.
Is the power switch of the indoor unit turned off? Turn on the power
switch.
During central control, " " appears in the remote controller display
and air conditioner operation cannot be started or stopped using the
remote controller.
Wait approximately three minutes.
(Operation has stopped to protect the air conditioner.)
Is the on timer set?
Press the ON/OFF button to stop operation.
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the air conditioner.
Does " " appear in the remote controller display?
Consult the concerned people who control the air conditioner.
Has the auto recovery feature from power failures been set?
Press the ON/OFF button to stop operation.
Is the off timer set?
Press the ON/OFF button to restart operation.
Is the air conditioner connected to a central remote controller?
Consult the concerned people who control the air conditioner.
Does " " appear in the remote controller display?
Consult the concerned people who control the air conditioner.
Are timer settings invalid?
If the timer can be set,
WEEKLY
remote controller display.
The initial settings are being performed. Wait approximately 3 minutes.
The protection devices have operated to protect the air conditioner.
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be sure to
provide the dealer with the model name and information that appeared in
the remote controller display.
When cooling operation stops, the drain pump operates and then stops.
Wait approximately 3 minutes.
The indoor operation sound level is affected by the acoustics of the particu-
lar room as shown in the following table and will be higher than the noise
specification, which was measured in an echo-free room.
High sound-ab-
sorbing rooms
Broadcasting
Location
studio, music
examples
room, etc.
Noise levels 3 to 7 dB
The batteries are low.
Replace the batteries and press the Reset button.
If nothing appears even after the batteries are replaced, make sure that
the batteries are installed in the correct directions (+, –).
The self diagnosis function has operated to protect the air conditioner.
Do not attempt to repair this equipment by yourself.
Turn off the power switch immediately and consult your dealer. Be sure to
provide the dealer with the model name.
When another indoor unit is operating in heating mode, the control valve
opens and closes occasionally to maintain stability in the air conditioning
system. This operation will stop after a while.
* If this will cause an undesirable rise in the room temperature in small
rooms, etc., stop the operation of the indoor unit temporarily.
, or appears in the
SIMPLE AUTO OFF
Low sound-ab-
Normal rooms
sorbing rooms
Reception
Office, hotel
room, hotel
room
lobby, etc.
6 to 10 dB 9 to 13 dB