Control Specification SiBE01-829
24 Functions and Control
3. Control Specification
3.1 Four Way Valve Switching
Outline Current is conducted during heating operation, and current is not conducted during cooling or
defrosting. In order to eliminate the switching sound (as the four way valve coil switches from
ON to OFF) when the heating is stopped, the delay switch of the four way valve is carried out
after the operation stopped.
Detail The four way valve is switched 150 sec. after the compressor stops.
3.2 3-Minute Standby
Prohibit to turn ON the compressor for 3 minutes after turning it off.
(except when defrosting)
3.3 Compressor Protection Function
When the compressor turns ON, it keeps running at least 180 sec..
(except when defrosting)
3.4 Freeze-up Protection Control
Outline During cooling/dry operation, freeze-up protection control is activated according to the
temperature of the indoor heat exchanger to prevent it freezing.
Detail Conditions for starting
Temperature of the indoor heat exchanger
≤
1
°
C for 1 min. or more
Compressor running time
≥
10 minutes
While controlling
The compressor halts.
Conditions for ending
Temperature of the indoor heat exchanger
≥
10°C for 1 min. or more
or
The operation stops.
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