Gree GPH12AF-K3NNA7A

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Technical Information
Service Manual
6.2 Sleep function
When setting sleep function under cooling mode, Tpreset will increase
1ć (2) after 1 hours. 2 hours later, Tpreset will increase
2
ć(4) automatically. The upper limit of temperature is 30ć (86).
When setting sleep function under heating mode, Tpreset will decrease
1ć (2) after 1 hours. 2 hours later, Tpreset will decrease
2
ć (4) automatically. The lower limit of temperature is 30ć (86).
6.3 Buzzer: Upon energization or operation, the buzzer will give out sound.
6.4 Control button
ON/OFF button: turn on or turn off unit.
Mode button: the mode will be switched as below sequence:
Heat pump unit: cooling-drying-fan-heating
Cooling only unit: Cooling-drying-fan
Temperature “-“ button: If set temperature under ON status, temperature will decrease
1ć or  after each pressing of this button. The
temperature can’t be set lower than 16
ć or 61. The button is invalid under auto, drying and fan mode.
Temperature “+“ button: If set temperature under ON status, temperature will increase
1ć or  after each pressing of this button. The
temperature can’t be set higher than 30
ć or 86. The button is invalid under auto, drying and fan mode.
6.5 Display
6.5.1 Display of indicator
When turning of the unit, the current operation mode indicator will be displayed.(LED lamps for Cooling, Heating, Drying and Fa
n)
6.5.2 Dual-8 display
When the unit is turned on for the first time, niexie tube is defaulted to display set temperature. When the unit received the
signal of set
temperature, nixie tube display set temperature. When the unit received the signal of ambient temperature, the nixie tube disp
lays
current indoor ambient temperature.
6.5.3 Light control
When the unit is turned on for the first time, light is defaulted ON. If setting light ON by remote controller, indicator and
dual-8 nixie tube
displays current set status. If setting light OFF by remote controller, light will be turned off immediately. If there’s operat
ion for button
on panel and remote controller when setting light OFF by remote controller, indicator and dual-8 nixie tube will display set st
atus for 5s
and then turn off the light.
6.6 Auto fan speed control
6.6.1 Heating mode: under auto heating or normal heating mode, auto fan speed will operate as below mode:
When Tamb.≤Tpreset+Tcompensation-
2ć(4), indoor fan operates at high fan speed;
When Tpreset+ Tcompensation-
2ć(4)<Tamb.<Tpreset + Tcompensation, indoor fan operates at middle fan speed;
When Tamb.≥Tpreset+Tcompensation, indoor fan operates at low speed;
6.6.2 Cooling mode: under auto cooling or normal cooling mode, auto fan speed will operate as below mode:
When Tamb.≥Tpreset+ Tcompensation+
2ć(4), indoor fan operates at high fan speed;
When Tpreset+ Tcompensation<Tamb.<Tpreset + Tcompensation +
2ć(4), indoor fan operates at middle fan speed;
When Tamb.≤Tpreset+Tcompensation, indoor fan operates at low speed;
Auto fan under fan mode is as the same of cooling mode;
6.7 Power-off memory function
Memory content: mode, light, set temperature, set fan speed, swing. When power failure, the unit will operate at previous oper
ation
status automatically after power recovered.
6.8 Swing motor control
After energization, the swing blade will rotate to OFF position. If swing function hasn’t been set after turning on unit, the
swing blade
will rotate to ON position. If swing function has been set when turning on unit, swing blade will rotate to-and-fro.
6.9 X-FAN control mode
X-FAN function can be set under cooling and dry mode (X-FAN function is unavailable under auto, heating and fan mode)
7 Protection function
7.1.1 Water overflow protection
Buzzer will give out sound for 8 times for warning. The complete unit will stop operation. Error code H8 is displayed and heat
ing
indicator OFF 3s and blinks 8 times.
7.2 Malfunction of indoor ambient temp sensor
“Dual 8” nixie tube displays F1, LED lamp for cooling blinks once. Compressor, electric heater, draw water motor, 4-way valve
and
outdoor fan stop. Indoor fan will operate at set speed.
7.3 Malfunction of outdoor pipe temp sensor
“Dual 8” nixie tube displays F2, LED lamp for cooling blinks twice. Compressor, electric heater, draw water motor, 4-way valve
and
outdoor fan stop. Indoor fan will operate at set speed.
7.4 Freeze prevention protection
Under freeze prevention protection, compressor, outdoor fan and draw water motor stop operation. Indoor fan operates at set fa
n
speed.
7.5 Compressor protection
Compressor can be restarted only after 3 minutes delayed.