Service manual

AUX Air Conditioner Service manual
37
Section 6 Trouble Shooting Guide
1. Starting Items to check
1.1 Make sure input voltage must be within the±10% range of the nominal voltage. If the operation
electric tension exceeds scope.the air conditioner may not working normally.
1.1 Make sure the indoor/outdoor communication connecting wire is correct.
This series of unit model have two indoor unit.with a communication cable connected to the outdoor
unit. Please connected the indoor and outdoor connecting wire strictly according to the circuit diagram.
air conditioning. with different type may use connecting wire of the same specification. Please confirm
that the code on connecting terminal of indoor and outdoor connecting wire is the same with the code
on connecting wire. otherwise air-condition may not work normally.
1.3. Please confirm the indoor and outdoor unit are linked with power supply(each unit have
independent power supply).
1.4. If appear the following cases.it will not be due to malfunction of air-condition
No Cases Explanation
1
When the power plug of indoor unit
insert the socket for the first time. sound
can be heard but the air-condition
doesn't work.
This means the conditioner is on power. Press the
on/off button on the remote controller.when the
air conditioner receives the signal. it will work
2
In the cooling mode.room temperature
is above the set temperature.
Compressor doesn't work. but the
indoor fan runs.
While the air conditioner is turned off. it takes 3
minutes delay to restart it. When the air
conditioner is reelectrified. it's the same case.
While compressor delays 3 minutes. the air
conditioner can regulate the wind speed in the
room according to the set speed.
3
The compressor will not function
continuously in the mode of
dehumidify.
In the mode of dehumidification.the work state of
compressor will be controlled automatically
according to indoor temperature.
4
When the LED light is on.the air
conditioner does not work.
The timer is in a state of timing. and air
conditioner is in readiness for action.
If the timing is cancelled. the air conditioner will
get back to work.
5
In the cooling and dehumidification
mode. it doesn't work continuously. and
the speed of indoor fan engine slows
down. Function. and indoor engine fan
electromotor speed reduction
The interval of compressor or the slow-down of
wind speed is to protect the indoor heat
exchanger from freezing.
6
One of indoor unit works normally.but
one of indoor unit has no response to
signals of remote controller.
One of indoor unit works as cooling or
dehumidification mode.another one indoor unit
cann’t work as heating mode.The mean is that the
indoor unit with heating mode couldn’t receive
single from remote controlle.
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