opening position after being fully turned off.
5.2.6.2 TD High Temperature Protections
As long as unit is on, the TD air discharge overheat protection feature will be activated, yet air
discharge sensor fault must be alarmed 4 minutes after compressor starts.
TD（℃）
Abnormal Shutdown
117
Rapid frequency drop（1HZ/s）
112
Slow frequency drop (1HZ/10s)
108
Invariable frequency
105
Frequency rise (1HZ/10s)
98
Frequency rise（1HZ/1 s）
When TD>117 for 20s continuously℃ ，air discharge overheat protection will be activated and fault will
be reported to indoor unit.
It will not continue in other conditions.
5.2.6.3 Indoor Heat Exchanger Anti-freeze Protection
Anti-freeze during cooling
11℃
9℃
7℃
6℃
5℃
When TC < 5℃，compressor frequency will drop at a speed of 1HZ/10s
When TC starts to rise，and 6 ≤ TC ≤ 7℃，compressor frequency will remain unchanged.
When 7 < TC < 11 , fr℃ equency will rise at a speed of 1HZ/10s.
If TC ≤ 0℃，for 2 consecutive minutes, compressor will shutdown and outdoor fault lamp blinks. Fault
will not be reported to indoor unit.
When compressor shuts down for more than3 minutes，and when TC>7℃，compressor will restart.
5.2.6.4 Outdoor Temperature Limit
Cooling: When outdoor temperature is lower than 23 , cooling operation will start, compressor ℃
frequency is limited to less than 50 HZ, outdoor wind speed is forced at level 1.
Heating: When outdoor temperature is higher than 18 , heating operation will start, compressor ℃
frequency is limited to less than 50 HZ, outdoor wind speed is forced at level 1.
30
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