Functions and control
20
Domestic air conditioner
value of the middle 2 values), take the mean value.
TTC˄ć˅
Abnormal stop
115
Decreasing the frequency rapidly˄1HZ/second˅
110
Decreasing the frequency slowly (1HZ/10seconds)
105
The frequency doesn’t change.
98
Increasing the frequency (1HZ/10second)
95
Increasing the frequency˄1HZ/1second˅
TTC>=115ć lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to the
indoor, others don’t last.
7.1.4.2 TC high temperature-preventing control of the indoor heating unit˖
Tpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the
running state). TC=indoor coil temp.
The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the
temperature is higher than 55ć, 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 47ć, recover to the normal control.
TC(ć) The compressor stops Fgh_t1 63ć
Fgh_t1ˉ2 62ć
Fgh_t2ˉ2 58ć N Decreasing the frequency rapidly Fgh_t2 60ć
P Decreasing the frequency slowly Fgh_t3 56ć
Fgh_t3ˉ2 53ć
Fgh_t4—2 51ć Q Prohibiting increasing the frequency Fgh_t4 53ć
R Increasing slowly Fgh_t5 47ć
Fgh_t5—2 46ć
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
7.1.4.3 Anti-freezing protection of the indoor heat exchanger
When refrigerating/heating, prevent freezing.
Tpg_indoor is the minimum value of the effective indoor unit (start it and it is in accord with the running
state).
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