Haier AS25THMHRA-C, Service Manual, Page: 360 / 537

Functions and control
18
Domestic air conditioner
state). TC=indoor coil temp.
The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the
temperature is higher than 63
℃
, decrease the rotate speed of the compressor and do the high
temperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor heat
exchanger is lower than 4
●
5 ℃ , recover to the normal control.
(09K12K)
TC(
℃
) The compressor stops Fgh_t1 63
℃
/63
℃
Fgh_t1
－
2
Fgh_t2
－
2 N Decreasing the frequency rapidly Fgh_t2 60
℃
/59
℃
P Decreasing the frequency slowly Fgh_t3 57 ℃ /56 ℃
Fgh_t3
－
2
Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 52
℃
/53
℃
R Increasing slowly Fgh_t5 40
℃
/40
℃
Fgh_t5—2
Normal
N
：
Decreasing at the speed of 1HZ/1 second
●
P
：
Decreasing at the speed of 1Hz/10 seconds
●
Q
：
Continue to keep the last-time instruction cycle
R ： Increasing at the speed of 1Hz/10seconds
Remarks: the outdoor unit
7.1.5.3 The control of preventing the over current of the compressor:
●
During the starting process of the compressor, if the current of the compressor is greater than 12.5A
for 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times
in 20 minutes, stop the compressor and alarm, and confirm the malfunction. Then continue to run it only
after the power is off.
●
During the starting process of the compressor, if the AC current is greater than 9A, the frequency of
the compressor decreases at the speed of 1HZ/second.
●
During the starting process of the compressor, if the AC current is greater than 8A, the frequency of
the compressor decreases at the speed of 0.1HZ/second.
●
During the starting process of the compressor, if the AC current is greater than 7.5A, the frequency of
the compressor increases at the prohibited speed.
● During the starting process of the compressor, if the AC current is greater than 6.5A, the frequency of
the compressor increases at the speed of no faster than 0.1HZ/second.
7.1.5.4 The protection function of AC current:
During the starting process of the compressor, if the AC current is greater than 12.5A for 3 seconds,
stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20 minutes,
●
stop the compressor and alarm, and confirm the malfunction. Then continue to run it only after the the
power is off.
During the starting process of
●
the compressor, if the AC current is greater than 9A, the frequency of the
compressor decreases at the speed of 1HZ/second.
During the starting process of the compressor, if the AC current is greater than 8A, the frequency of the
compressor decreases at the speed of 0.1HZ/second.
During the starting process of the compressor, if the AC current is greater than 7.5A, the frequency of