AUX ASW-07B4/HSAR, Service Manual

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it lowers to less than 30 , the indoor fan will be shut down; And the
time when the afterheat blows will last less than 40 seconds after
the indoor fan is turned off.
6.7 Defrosting operation:
6.7.1The conditions upon which the outdoor sensor goes into operation are
as below:
1. Under the circumstance of heating, if T external coiled pipe is at the
temperature of less than -6 which lasts 2 minutes and the
accumulated working time of compressor reaches more than 50
minutes (if there is any power cut-off or shut-down by remote
control, the accumulated working time of compressor shall be
re-calculated), the defrosting interval will be more than 50 minutes
and the compressor will be working 5 minutes continually.
2. If there is any damage to the external coiled pipe, the accumulated
working time of compressor will reach 50 minutes (if there is any
power cut-off, shut-down by remote control or defrosting, the
accumulated working time of compressor shall be re-calculated)
and the defrosting operation will last 10 minutes.
6.7.2 Once one of the following conditions is satisfied, the defrosting will
end:
1. The temperature of T external coiled pipe is more than 12 .
2. Defrosting duration is more than 12 minutes.