Cooper & Hunter FG20/C-M, Service Manual

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COMMERCIAL AIR CONDITIONER DUCT TYPE SPLIT AIR CONDITIONER
20
When T
ambient
– T
supplemen
t
≥ T
setting
＋
1 , the compressor and the outdoor fan stop running.
℃
The selector valve is still energized, and the indoor fan will run according to blowing residual heat.
(In that case, the indoor fan must keep running in case of heat accumulation inside the air duct.)
The compressor will stop running 15s earlier than the outdoor fan.
2.4 Defrosting
ON
ON
OFF
ON
OFF
OFF
OFF
ON
ON ON
ON
ON
ON
defrosting mode
compressor
outdoor fan
indoor fan
auxiliary
heater
way
valve
time
defrosting stop
defrosting
run at setting
speed
meet running
condition
Defrosting Condition
When the heating time accumulates to 44min and T
condenser
≤
－
5 lasts for 1min, the unit
℃
will start defrosting. In that case, the selector valve, the outdoor fan and auxiliary e-heater will
stop running, while the compressor will run forcibly and the indoor fan will run according to
anti-cold air. (The indoor fan will not run during defrosting. After defrosting, with T
evaporator
≥ 35 or time ≥ 45s, the indoor fan will start running. ℃ )
Defrosting Terminating Condition
The defrosting will terminate after it lasts for 10min or T
condenser
≥ ＋ 10 lasts for 1s. In that ℃
case, the selector valve and the outdoor fan will run at the same time.
After defrosting, the 4-way valve is switched. The outdoor fan will run 1s later.
2.5 Fan Mode
Only the indoor fan is running.
3 WIRELESS REMOTE CONTROLLER
3.1 Operation View
1) Controller-Duct Type