Gree GWH09RB-K3DNA3G Service Manual page 23

F3: Outdoor ambient sensor start and short circuit (continuously measured failure in 30s)
F4: Outdoor condenser sensor start and short circuit (continuously measured failure in 30s, and don't measure within 10 minutes after
defrosted)
F5: Outdoor exhausting sensor start and short circuit (continuously measured failure in 30s after the compressor operated 3 minutes)
H3: Overload protection of compressor
H5: Module protection
PH: High-voltage protection
PL: Low-voltage protection
P1: Nominal cooling and heating test
P2: Maximum cooling and heating test
P3: Medium cooling and heating test
P0: Minimum cooling and heating test.
(12) Drying Function
You may start or stop the drying function under the modes of cooling and dehumidify at the starting status (The modes of automatism,
heating and air supply do not have drying function). When you start the drying function, after stop the machine by pressing the switch
button, you should keep running the inner fans for 2 minutes under low air damper (The swing will operate as the former status within 2
minutes, and other load is stopped), then stop the entire machine; When you stop the drying function, press the switch button will stop
the machine directly.
When you start the drying function, operating the drying button will stop the inner fans and close the guide louver.
(13)Memory Function
When interrupting the power supply memory content: mode, swing function, light, set temperature and wind speed.After interrupted the
power supply, the machine will start when recovering the power according to the memory contentautomatically.
(14)Electric heating band control of outdoor unit
① Compressor electric heating band control:
a) Start condition: the compressor is in off status and the T
b) Stop condition: the band is off when either of the below condition is met:
1.The compressor is in on status;
2.The compressor is in off status and the T
c) When outdoor ambient temperature sensor is in malfunction status, the electric heating band stops operation.
② Condenser electric heating band control:
1.When T ≤1°C, the electric heating band starts working;
outdoor ambient
2. When enter defrosting and defrosting is finished, the chassis electric heating band starts working for 3min as the compressor
starts. After the compressor starts for 3min and T
3.When T ≥3°C, the condenser electric heating band doesn't work.
outdoor ambient
4.When 1°C<T
outdoor ambient
When outdoor ambient temperature sensor is in malfunction status, the electric heating band stops operation; the electric heating
band can work again after 2min of last stop.
(15)Compulsory defrosting function
① Start up compulsory defrosting function
Under ON status, set heating mode with remote controller and adjust the temperature to 16°C. Press "+, -, +, -, +,-" button successively
within 5s and the complete unit will enter into compulsory defrosting status. Meanwhile, heating indicator will ON 10s and OFF 0.5s
successively. (Note: If complete unit has malfunction or stops operation due to protection, compulsory defrosting function can be started
up after malfunction or protection is resumed.
② Exit compulsory defrosting mode
After compulsory defrosting is started up, the complete unit will exit defrosting operation according to the actual defrosting result, and the
complete unit will resume normal heating operation.
(16)Refrigerant recovery function (applicable for moving the unit or maintaining the unit)
① Start up refrigerant recovery function
Set cooling mode with remote controller within 5min after energization, adjust temperature at 16°C and press light button on remote
controller for 3 times successively to any one indoor unit within 3s and then the complete unit will enter into refrigerant recovery status.
All indoor units display Fo. Maintenance person close all liquid valves. After 5min, withstand the thimble of all checking valves with tools
one by one. If there's no refrigerant spraying out, close corresponding valve immediately, turn off the unit with remote controller and then
remove the connection pipe.
② Exit refrigerant recovery function
During refrigerant recovery process, if any one indoor unit receives any remote control signal or refrigerant recovery function has
operates for about 25min, refrigerant recovery function will be exited automatically. If the complete unit is at standby status before
refrigerant recovery, the complete unit will still at standby status after refrigerant recovery. If the complete unit is at ON status, the unit will
operate according to original operation mode.
20
outdoor ambient temperature
outdoor ambient
<3°C, the condenser electric heating band keeps the previous status.
≤-5°C.
outdoor ambient temperature
≥-5°C.
≥3°C, the electric heating band stops operation.
Service Manual
Technical Information