Description Of Each Control Operation - Gree GWH09RB-K3DNA2C Service Manual

6.2 Description of Each Control Operation

1. Temperature Parameters
Indoor preset temperature (T
Indoor ambient temperature (T
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1)COOL mode
The condition and process of cooling
COOL mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set speed.
If T ≥T
amb. preset
If T ≤T t-2 , the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set speed.
amb. prese
If Tpreset-2 ≤T
amb
In this mode, the reversal valve will not be powered on and the temperature setting range is 16
Protection function
Overcurrent protection
If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the
outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor
Antifreezing protection
When the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the
indoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and the
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.
(2) Dehumidifying Mode
Working conditions and process of dehumidifying
If T . T , the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will
amb preset
operate and the indoor fan will run at low speed.
If T -2 T
preset amb
If T .< T -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
amb preset
operate at low speed.
Protection
Protection is the same as that under the cooling mode.
26
)
preset
)
amb.
≤T
, the unit will keep running in the previous mode.
preset
Tamb.
Tpreset
Tpreset –2 ˚C
≥ 6 min.
Compressor
Outdoor fan
Indoor fan
Run
Compressor
Outdoor fan
Indoor fan
. T , the compressor remains at its original operation state.
preset
≥ 3 min. ≥ 6 min.
Setting fan speed
Stop
During antifreeze protection
min
Preset speed
Run Stop
Function and Control
~30 .
Start cooling
Original operating status
Stop cooling
yellow light will blink 5 times.