Gree GVC36ALXH-K3NTC7A Service Manual page 32

Service Manual
(2) Sleep function
◆ If start up sleep function under cooling or drying mode, the
system will increase set temperature automatically within 3℃ and
then operate at increased temperature.
◆ If start up sleep function under heating mode, the system will
decrease set temperature automatically within 3℃ and then
operate at decreased temperature.
(3) Turbo function
Turbo function can be set under cooling and heating modes (Turbo
function is not available in auto, drying and fan mode). During
operation of turbo function, the IDU fan motor operates at the
highest fan speed.
(4) X-FAN function
X-FAN function can be set under cooling and drying modes (Turbo
function is not available in auto, heating and fan mode). During
operation of X-FAN function, the IDU fan motor will stop operation
after operating for 10 mins at lowest fan speed when turning off the
unit and then the system stops operation.
(5) Auxiliary heating function
When auxiliary heating function is set in heating mode: IDU fan
motor operates and auxiliary electric heater operates; when
ambient temperature has reached a certain degree, the auxiliary
electric heater stops operation.
(6) Timer function
The controller has timer function. The precision of timer is 0.5 hour.
24 hours circulated timer can't be set.
Timer ON: Timer ON can be set at unit OFF. If selected ON time is
reached, the unit will start to operate according to previous setting
status. Timer setting range is 0.5 ～ 24hr in 30-minute increments.
Timer OFF: Timer OFF can be set at unit ON. If selected OFF time
is reached, the unit will stop. Timer setting range is 0.5 ～ 24hr in
30-minute increments.
(7) Memory function
① Power failure when the unit is ON
◆ Memory content: ON status, mode, up&down swing, light, set
temperature, set fan speed, timer.
◆ Timer can be memorized. Time of timer is calculated again from
energization.
② Power failure when the unit is OFF
◆ Memory content: OFF status, mode, up&down swing, light, set
temperature, set fan speed, timer.
◆ Timer can be memorized. Time of timer is calculated again from
energization.
4. Special function
Health function (for the model with health function)
① If there is health button on the remote controller, the unit
defaults health function ON when turning on the unit; press health
button on the remote controller or turning off the unit to stop health
function.
① If there is not health button on the remote controller, the unit
defaults health function ON when turning on the unit and turning off
the unit to stop health function.
Technical Information
5.Protection function (more details please refer to
maintenance section)
(1) Freeze protection (applicable for cooling, drying and auto
mode)
During operation, when controller detected that Ttube≤ － 2℃ , the
system enters into freeze protection. In that case, the compressor
and the ODU fan motor stop operation, while the IDU fan motor
and swing motor operates at previous status. If Ttube≥10℃ and
the compressor has been out of operation for 6 mins, the unit will
resume its previous operation status.
Compressor
Outdoor fan motor
Indoor fan motor
(2) Overcurrent protection (applicable for cooling, heating,
drying and auto mode)
During operation process, if controller detected that system
current exceeds the limit value for 3s consecutively (overcurrent),
the system stops operation. About 3 mins later, if overcurrent is
released, the system will resume original operation. If overcurrent
protection occurs for 6 times consecutively, and resume operation
time won't exceed 6 mins every time, E5 will be displayed on
indoor unit. After turning off the unit and then turn it on, overcurrent
malfunction will be eliminated.
(3) High temperature protection of discharge pipe (for the unit
below 24000Btu/h, the software of this function is reserved
while hardware is shielded) (applicable for cooling, heating,
drying and auto mode)
When the system just starts and Tdischarge ＞ 130 ℃ , the system
will stop operation after internal temperature of system decreases.
When the system has stopped for 3 mins and Tdischarge ＜ 90℃ ,
the system will resume operation. If this protection occurs twice
consecutively, the system can not resume operation and E4 will be
displayed. After turning off the unit and then turn it on, overcurrent
malfunction will be eliminated.
(4) Noise silencing protection (applicable for heating and auto
mode)
When turning off the unit or during mode switchover, the 4-way
valve is closed. In order to decrease noise, the 4-way valve will
delay 2 mins to be closed.
(5) System high pressure protection (applicable for cooling,
heating, drying and auto mode)
When system high pressure protection is detected by the controller,
all loads stop except IDU fan motor in cooling and drying mode;
all loads stop in heating mode; button and remote control signals
are shielded and E1 is displayed. When system high pressure
protection is eliminated, button and remote control signals are
available.
(6) Compressor low pressure protection (applicable for
cooling, heating, drying and auto mode)
When compressor low pressure protection is detected by the
controller, the system stops; button and remote control signals
are shielded and E3 is displayed. When compressor low pressure
Freeze protection period
6 min
Set fan speed
29