Main Logic; Cooling; Dry Mode - Gree FGR20/BNa-M Service Manual

2 MAIN LOGIC

The followings are for FG(R)20/BNa-M, FG(R)30/BNa-M

2.1 Cooling

Compressor
Outdoor fan
4-way valve
When Tambient ≥ Tset+1℃ , the unit will run in cooling mode. In this case, compressor and outdoor fan
run; Indoor fan runs at setting speed.
When Tambient ≤ Tset-1℃ , the unit will stop running in cooling mode. In this case, compressor and outdoor
fan stop running; Indoor fan runs at setting speed.
When Tset -1℃＜ Tambient ≤ Tset+1℃ ,the unit will keep its previous running state.

2.2 Dry Mode

Compressor
Outdoor fan
4-way valve
When Tambient ≥ Tset+2℃ , the unit will run in cooling mode. In this case, compressor and outdoor fan run;
Indoor fan runs at low speed.
When Tambient ≤ Tset-2℃ ,the unit will stop running in cooling mode. In this case, compressor and outdoor
fan stop running.
When Tset -2℃＜ Tambient ≤ Tset+2℃ ,the unit will be in the state that the compressor runs for 6min and
stops for 4min in cycle. Indoor fan runs at low speed.
ON
OFF
OFF
OFF
Indoor fan
OFF
1s
ON
OFF
OFF
OFF
Indoor fan
OFF
1s
Cooling mode
Manually OFF
ON
OFF
ON
Htap
Run at set speed
OFF
15s
5s
Dry mode
Manually OFF
ON
OFF
ON
Htap
Run at low speed
OFF
15s
5s
Duct Type Split Air Conditioner
Service Manual
OFF
Time
OFF
Time
CONTROL
13