Functions and control
7.1.5 ˖Protection function
7.1.5.1˖TTC high temperature-preventing protection
Once the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing sensor
malfunction must alarm after 4 minutes during which the compressor is started (during the course of
self-detection, there’s no such limitation)
Sensor detection methods: 100 times (one cycle of procedure run is one time, and about 5ms, detection
method for each time: continuously sampling for 8 times, then order them and take the mean 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.
7.1.5.2˖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).
The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the temperature is
higher than 48ć, 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 45ć,
recover to the normal control.
TC Thecompressorstops
Fgh_t1ˉ2 Fgh_t1 63ć
N Decreasing the frequency rapidly Fgh_t2 59ć
Fgh_t2ˉ2 P Decreasing the frequency slowly
Fgh_t3 55ć
Fgh_t3ˉ2 Q Prohibiting increasing the frequency
Fgh_t4 51ć
Fgh_t4—2 R Increasing slowly Fgh_t5 47ć
Fgh_t5—2
Normal
N˖Decreasing at the speed of 1HZ/1second
P˖Decreasing at the speed of 1Hz/10seconds
Q˖Continue to keep the last-time instruction cycle
R˖Increasing at the speed of 1Hz/10seconds
Domestic air conditioner
20
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