Domestic Air Conditioner
5.2.6 System Protection Function
5.2.6.1 3 minutes stand-by time
Time interval between compressor shutdown and restart is set at 3 minutes to ensure that compressor
will only restart after 3-minute shutdown and initial energization valves are turned on to adequate
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˄ć˅
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 continuouslyć ˈair 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
9ć
1Hz/10sec 6ć
5 ć
0ć
When TC < 5ćˈcompressor frequency will drop at a speed of 1HZ/10s
When TC starts to riseˈand 6 TC 9ćˈcompressor frequency will remain unchanged.
When 9 < TC < 11 , frequć ency will rise nomal.
If TC 0ćˈfor 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 minutesˈand when TC>9ćˈcompressor will restart.
HSU12/18VHJ(DB)
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