Haier AW09TE1VHA Service Manual page 31

TC The compressor stops
Fgh_t1 2
Fgh_t2 2 N Decreasing the frequency rapidly
P Decreasing the frequency slowly
Fgh_t3 2
Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4
R Increasing slowly
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
3. Compressor Overcurrent Protection
If the current draw of the compressor at start-up is greater
than the overcurrent point listed on the chart below for
approximately 3 seconds, the compressor will stop and a code
will be indicated at the outdoor unit. After 3 minutes the
compressor will try to restart. If the overcurrent condition
occurs 3 times in 20 minutes, the system will lock-out and a
code will be indicated at the outdoor unit. It will be necessary
to remove power to the system to reset the lock-out condition.
The frequency of the compressor may change depending on
the current draw at start-up. Refer to the chart and current/
Hz table shown below.
Greater than current 1: Decreases 1Hz/second
Greater than current 2: Decreases 0.1Hz/second
Greater than current 3: No change
Over
Model current
Point
09K ~11A
12K ~13A
18K ~15A
24K ~17A
4. Indoor Coil Freeze Protection
The temperature sensed by the indoor unit coil sensor is
used to determine compressor operational frequency.
Tpg_indoor: indoor unit pipe sensor temperature
When Tpg_indoor < Tpg1, the frequency of the compressor
decreases at the rate of 1HZ / 1 second.
When Tpg_indoor < Tpg2, the frequency of the compressor
decreases at the rate of 10HZ / 10 seconds.
When Tpg_indoor begins to rise again, and TSJ Tpg_indoor
Tpg3, the frequency of the compressor does not change.
When Tpg3 < Tpg_indoor <Tpg4, the frequency of the compressor
increases at the rate of 1HZ / 10 seconds.
Example: if TSJBLQGRRU r) VXVWDLQV for 2 minutes, the
outdoor unit will stop and indicate an underload malfunction
code at the outdoor unit. The compressor stops for a minimum
of 3 minutes. When Tpg_indoor >Tpg4, the compressor
will restart.
Fgh_t1 65
Fgh_t2 59
Fgh_t3
Fgh_t5
Decline Decline Decline
Speed Speed Speed
Current 1 Current 2 Current 3
~8.5A ~8A ~7A
~10A ~9.5A ~8.5A
~12A ~11.5A ~10.5A
~13.5A ~13A ~12A
SEQUENCE of OPERATION
149°F
138°F
48°F
131°F
55
124°F
51
43°F
117°F 47
41°F
37°F
32°F
59°F // ice_temp_3+5
Increasing slowly
46°F // ice_temp_3+2
Keeping the frequency
43°F
Decreasing slowly
Decreasing rapidly ice_temp_1
Stop
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