AUX Air Conditioner Service manual
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Prevent cold wind function when compressor out of working：
1) When T e presents falling state. When T e＞25℃.the indoor fan motor will be in feeble wind
model.
T e≤25℃ .the indoor fan motor will trun off.
2) When T e presents rising state. and T e≥28℃.the indoor fan motor will be in feeble wind model.T e
＜28℃.the indoor fan motor will trun off.
Residual heat function:
When the T inter- panel＞35℃.indoor fan motor will run in feeble wind model.and when the T inter-
panel≤35℃. The indoor fan motor will shut down.and the residual heat function will be less than 10s.
When the T inter-panel < 35 ℃. the indoor fan motor will shut down immediately.
5.6.2 High temperature protection function:
1) When the air conditioner is in heating model.When either of two indoor unit’s T e≥57℃.and
continues for 10s. The out door fan motor will stop.if the T e≥64℃. and continues working for 10s. the
compressor will stop.when both of the two indoor unit’s T e≤52℃.and last for 3 mins. the air
conditioner will return to normal operations.
2) This temperature protection function only works when the temperature sensor is work
normal.
5.7 Defrosting operation.
When one of A、B or C、D is defrosting. if the other one is in heating mode. it will turn to defrosting
mode immediately; Only when the two compressors meet the condition of finishing defrost can they
get back to heating mode.
5.7.1 Entry condition of outdoor temperature sensor:
In heating system. T c(condenser)≤-6℃. for 2mins. compressor works for more than 50 mins. The
defrost interval is more than 50 mins; Compressor continuous operates for 5 mins. If outdoor unit
temperature sensor is damaged. every 50 minutes of operation needs a defrosting of 10 minutes. (If
power is cut off or the machine is turned off by remote controller. Work time of the compressor will
resume time)
5.7.2 Requirement of defrosting(sleeping light twinkle once a second).
When begin defrosting. compressor and indoor fan motor stop running. Outdoor fan motor and
four-way valve continues operation.
After 30s later. four-way valve and outdoor fan both stops running. After another 15 seconds.The
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