Temperature Parameter; Foundamental Functions; Cool Mode; Pcb Function Manual And Operation Method - Gree KF-20GW/A20 Service Manual

PCB function manual and operation method

PCB function manual 1
This function manual is firt for the ordinary Bird and Plastic Case Single Split Type series

Temperature parameter

The room set temperature: (Tset)
The room ambient temperature:(Tamb)
The evaporator tube temperature: (Ttube)
The condenser tube temperature: (Tdefrost)

Foundamental functions

After power is on, no matter when compressor is started, the time span between the startups cannot be less than 3 minutes.

COOL mode

Cooling condition
If Tamb¡ÝTset+1¡æ, COOL mode will act, compressor and outdoor fan will run, indoor fan will run at the set speed.
If Tamb¡ÜTset£-1¡æ,tunit will stop , compressor will stop and then outdoor fan will delay 15sec and stop.
If Tset-1¡æ£¼Ta mb£¼T set+1¡æ, the unit will keep running in the old mode.
In this mode, the reversal valve will not power on, the setting temp. range:16¡æ~30¡æ
Protection Functions
Overcurrent Portection
When the system current is tested higher than 13A, only fan will run. After 3 minutes, the whole unit will run in the old
mode, if the overcurrent cannot be eliminated, the whole unit will stop, and can be restarted by the wireless remote control.
Antifreezing Protection
When the system is tested, the compressor and outdoor fan will stop, indoor fan will run at the set speed; when the antifreezing protection is
and the compressor has stopped for 3min, the unit will return to the old mode.
Ambient set
temp.Tamb
Tset
Tset
Compressor
Outdoor fan
Run at the set speed
Indoor fan
Running
Compressor
Outdoor fan
Indoor fan
Running
Bird Single-Split Type
Start the cooling
Keep running in the old mode
Stop the cooling
3Min
Run at the set speed
Stop
Current
3Min
Stop