Dry Mode; Heat Mode; The Conditions And Processes Of Dehumidifying; Protection Functions - Gree KF-20GW/A20 Service Manual

DRY Mode

The conditions and processes of dehumidifying:

If Tamb>Tset+2¡æ, the cooling mode will act, indoor fan speed could be adjusted, outdoor fan will run.
If Tset -2¡æ¡ÜTamb¡ÜTset+2¡æ,DRY mode will act, the indoor fan will run at the low speed.after running for 6mins, outdoor fan and compressor will stop, but
indoor fan will delay 30secs and stop, after 3.5mins, compressor and outdoor fan will run, and indoor fan will run at the low low speed. The processes of dehumidifying
are shown as the above cycle.
If Tamb£¼T set-2¡æ, the unit will stop, the compressor will stop, after 15sec latter, outdoor fan will stop, after another 15sec, indoor fan will stop.
In this mode, the reversal valve will not power on, the setting temp. range:16¡æ~30¡æ.

Protection Functions

Antifreezing Protection
When running in COOL mode, antifreezing protection is the same as the cooling. The DRY mode act, when the antifreezing protection is detected,
the compressor will stop, but outdoor fan will delay 15secs and stop, indoor fan will run at low speed; when antifreezing protection is eliminated and
compressor has stopped for 3min, the whole unit will run at the original status.

HEAT Mode

The conditions and processes of heating
If Tamb ¡ÜTset+2¡æ, HEAT mode will act, compressor, outdoor fan and reversing valve will run, but indoor fan will after 20sec delayed and run.
If Tamb¡ÝTset+4¡æ, Compressor will stop first, outdoor fan will delay 15s and stop, reversing valve will keep working, after 30secs indoor fan will blow
the surplus heat, after 30secs it will stop.
If Tset+2¡æ£¼T set£¼T set +4¡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.
During the antifreezing protection
Compressor
Outdoor fan
Indoor fan
Running
Ambient
temp.Tamb
Tset
Tset
Compressor
Outdoor fan
Fan speed could
Indoor fan
be adjusted
Running
During the antifreezing protection
Compressor
Outdoor fan
Indoor fan
Running
Tset
Tset
Compresso
r Outdoor fan
Low speed
Indoor fan
Reversal valve
Running
3Min
Run at the set speed
Stop
6Min 4Min 6Min 4Min
Low speed
Low speed
Stop
3Min
Low speed
Stop
Ambient temp.
Tamb
3Min
Stop
Start the cooling
Dehumidifying operation
Stop the cooling
Stop the heating
Keep running in the old mode
Start the heating