AUX Air Conditioner Service manual
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delay 30S to open indoor fan. with a mute wind speed. at the same time malfunctions shown.
9.4.3 When the deviation of T c signal of outdoor coil temperature sensor is detected. strobolamp
flickers. and malfunction is indicated. If the remote manipulator signal of heating is received. press
heating for 50min.defrosting for 10min.to cycle heating. The rest mode function as usual.
9.5 Indoor PG .motor fault handling
After the indoor motor is put on voltage. If the feedback signal is not received within 12 seconds. Then
indoor fan will automatically function as low wind.
9.6 Communication malfunction
If outdoor motor doesn’t receive the signal from indoor unit PCB.correspondent outdoor uinit stops. If
indoor unit PCB desn’t receive the signal from outdoor unit.it will stops. Strobolamp flickers.display
corresponding malfunction.Once a communication malfunction appears.It cannot be automatically
recovered. After the trouble is solved.it can only be work by remote controller or pressing the starting
up button.
10. Mode Control
The function modes of outdoor unit are only three: non-heat（cooling. dehumidify）. heating（include
defrost）. standby（closedown and ventilation mode）. A. B. and C. D are independent and unaffected
to each other. The function mode of the outdoor unit is decided by the priority of the four modes.
Once outdoor unit function mode is decided.the other compressor which doesn't fit the function mode
would stop
For example.：One of A. B. or C D firstly cooling（dehumidify）.then outdoor unit mode will be
cooling.if the other machine starts with heating.then heating will not function. Only after refrigeration
（dehumidify) indoor unit turn to standby or heating can outdoor unit turn to heating mode.
11. Digital Tube Display Function
11.1 In the normal condition of the controller.the digital tube display indicator shows room
temperature when the machine is on. If the designed temperature is changed. then the designed
temperature is shown. and flickers at a rate of once per second. then return to room temperature after 5
seconds.
11.2 fault indication function（nixie display indicator）：
Failure cause Display mode Display priority
Indoor&outdoor communication
malfunction
Show "E5" 1
PG motor feedback of fault Show "E4" 2
T ambient sensor feedback fault Show " E1" 3
T evaporator senor feedback fault Show " E3" 4
T condencer sensor feedback fault Show " E2" 5
12. Adjustment Function of Air blade
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