Brief Description Of Models And Functions - Gree GWH09AECXB-K6DNA1A Service Manual

6.2 Brief Description of Models and Functions

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 avail-
able, 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 compres-
sor will not be stopped within 6 minutes regardless of changes in room temperature.
(1)Cooling Mode
① The condition and process of cooling
If T ≥T cooling mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set speed.
amb. preset
If T ≤T -2°C(3.6°F), the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set
amb. preset
speed.
If T -2°C(3.6°F)<T .<T
preset amb
When 0≤ T -T ＜ 2°C(3.6°F), if indoor fan speed is high, it will turn to medium fan speed; if indoor fan speed is medium or low, it will
preset amb.
keep the same;(this condition will be valid only when the compressor is operating); if indoor fan speed is super high, it will keep the same;
When T -T ≥1°C(1.8°F), the fan speed will return to set fan speed;
amb. preset
In this mode, the reversal valve will not be powered on and the temperature setting range is 16~30°C(68~86°F).
② 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 out door yellow light will blink 5 times.
◆ 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 min-
utes, the compressor will resume running in the original mode.
(2) Dehumidifying Mode
① 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 operate and the
amb. preset
indoor fan will run at low speed.
If T -2°C(3.6°F)≤T ≤T
preset amb.
If T < T -2°C(3.6°F), the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will operate at low
amb. preset
speed.
② Protection function
Protection is the same as that under the cooling mode.
(3) Heating Mode
① The condition and process of heating
If T ≤T +2°C(3.6°F), heating mode will act, the compressor, outdoor fan and reversal valve will run, the indoor fan will delay 3min to
amb. preset
stop at the latest
If T +2°C(3.6°F)<T <T
preset amb.
If T ≥T +5°C(9°F), the compressor will stop, the outdoor fan will delay 30s to stop and indoor fan will blow 60s at low speed, the fan
amb. preset
speed cannot be shifted within blow residual heat.
20
)
preset
)
amb.
, 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
, the compressor remains at its original operation state.
preset
+5°C(9°F),the unit will keep running in the original mode.
preset
Start cooling
Original operating status
Stop cooling
≥ 3 min. ≥ 6 min.
30S 30S
Set fan spee d
Stop
During antifreeze protection
min
3
30S
Preset speed
Run Stop
Service Manual
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