SEQUENCE of OPERATION
PAGE 31
ENGLISH
59°F // ice_temp_3+5
46°F // ice_temp_3+2
43°F
Decreasing slowly
Decreasing rapidly ice_temp_1
Stop
Keeping the frequency
Increasing slowly
32°F
37°F
41°F
43°F
48°F
TC The compressor stops Fgh_t1 65
Fgh_t1
2
Fgh_t2
2 N Decreasing the frequency rapidly Fgh_t2 59
P Decreasing the frequency slowly Fgh_t3 55
Fgh_t3
2
Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 51
R Increasing slowly Fgh_t5 47
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
149°F
138°F
131°F
124°F
117°F
3. Compressor Overcurrent Protection
Model
Over
current
Point
Decline
Speed
Current 1
Decline
Speed
Current 2
Decline
Speed
Current 3
09K ~11A ~8.5A ~8A ~7A
12K ~13A ~10A ~9.5A ~8.5A
18K ~15A ~12A ~11.5A ~10.5A
24K ~17A ~13.5A ~13A ~12A
4. Indoor Coil Freeze 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
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 TTpg_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 Tfor 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.
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