AUX E Series, Руководство по обслуживанию

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AUX air conditioner service manual
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on plastic panel may deform, so buttons may fail to work. In this case, control panel shall be replaced
with same model product.
Case 9 Compressor low -pressure can’t be started up
Product Model ： ASW-H12A4/HS
Phenomena ： Compressor of outdoor unit can’t be started up
Cause Analysis: Indoor unit works well; voltage output and resistance of outdoor compressor are in
normal scope, so there’s some problem in compressor. Resistance of each winding of compressor is in
normal scope, the client’s voltage was 198 V, which was within the scope of design standard. So
startup performance of compressor (48D129) is not good enough.
Solution: replace capacitor for 35UF compressor and parallel connect a auxiliary starter to compressor
capacitor. There’s no need to replace compressor
Case 10 Compressor Capacitor and fan capacitor
Product Model ： ASW-H12A4/A
Phenomena: when air condition was in cooling situation, once compressor started up, air switch
tripped.
Cause Analysis: when air conditioner was in cooling function, compressor tripped once air condition
started up. We checked indoor unit and found it was in good condition, so fault is in the outdoor unit.
Opened outdoor unit and checked power line, resistance between L and N was infinitely great, but
there were no short circuit on two lines. Checked outdoor components one by one, we found that
compressor capacitor was disrupted.
Solution: replace compressor capacitor
Experience conclusion: if compressor trips when air conditioner is turned on, we shall check L and N
are short circuited. We shall further check indoor and outdoor components, and find out whether
they’re short circuited.
Case 11 Outdoor fan capacitor fault
Product Model ： ASF-H24B4/DS
Phenomena: the air conditioner stops to work frequently and can’t function properly
Cause Analysis: air conditioner has been used in a restaurant for over one year under 220V power.
According to the client, air conditioner failed to refrigerate sometimes. We checked and found that
pressure was 5kg; current was 1.5A, so we suspected condenser was too dirty. We cleaned condenser
and fault wasn’t eliminated. We checked outdoor unit and found that outdoor fan run too slow, and
compressor stopped to work when current rose. We checked winding of fan motor, and motor shell
was very hot. We checked winding resistance after motor cooled down, it had no problem. So we
presumed that fan capacitor was broken.
Solution: replaced fan and capacitor
Experience conclusion: because fan capacitor can’t function well, so fan is in the protection situation,
heat can’t be exhausted, and pressure unit stops to work. After 3 minutes, pressure unit will be started
up again. The process repeats again and again, so air condition starts and stops frequently. Based on
the faults we can conclude that causes of faults can be various, and problems can be caused by the
mutual interference of electrical control and system. Therefore, we should check and observe carefully