Gree GWH09KF-K3DNA5G Service Manual page 27

Service Manual
inner fan is running. The indoor fan and compressor may get the power when air deflector is on the default location.
(10) Display(NOTE:Nixie tube is not available for A8 panel.)
① Operation pattern and mode pattern display
All the display patterns will display for a time when the power on, the operation indication pattern will display in red under standby
status. When the machine is start by remote control, the indication pattern will light and display the current operation mode (the mode
light includes: Cooling, heating and dehumidify). If you close the light key, all the display patterns will close.
② Double-8 display
According to the different setting of remote control, the nixie light may display the current temperature (the temperature scope is
from 16 to 30°C) and indoor ambient temperature. The heating and air supply temperature will display 25°C under auto-mode, the
temperature will display 20°C under the heating mode, and under defrosting status, heating indicator on indoor unit OFF 0.5s and ON
10s.(If you set the fahrenheit temperature display, the nixie light will display according to fahrenheit temperature)
(11) Protection function and failure display
E2: Freeze-proofing protection E4: Exhausting protection E5: Overcurrent protection E6: Communication failure
F1: Indoor ambient sensor start and short circuit (continuously measured failure in 5S)
F2: Indoor evaporator sensor start and short circuit (continuously measured failure in 5S)
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 dont 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 P2: Maximum cooling and heating P3: Medium cooling and heating
P0: Minimum cooling and heating
(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 least 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) Power-failure memory function
What will be memorized includes modes, up and down wind blow, light, preset temperature, preset wind speed, general timing (no
memory for moment timing), and Fahrenheit /Celsius degree. When the unit is powered on again after power failure, operation
continues according to memorized content. If timing is not set by the last remote control command, the system will memorize the last
remote control command and operate in the mode specified in the last remote control command. If timing is set by the last remote
control command and power failure happens before the preset time, the system, as powered on again, will memorize the timing
function set by the last remote control command. Timing will be re-counted from the time at which the system is powered again. If
timing is set by the last remote control command and timing of start or stop is reached before power failure, the system, as powered
on again, will memorize operation state before power failure and will not perform timing action. Moment timing is out the range of
memory.
(14) Refrigerant recycling function (applicable when changing installation location or in maintenance)
1. Enter refrigerant recycling function
Within 5min after energizing (unit ON or OFF status is ok), continuously press LIGHT button for 3 times within 3s to enter refrigerant
recycling mode; Fo is displayed and refrigerant recycling function is started. At this moment, the maintenance people closes liquid
valve. After 5min, stick the thimble of maintenance valve with a tool. If there is no refrigerant spraying out, close the gas valve
immediately and then turn off the unit to remove the connection pipe.
2. Exit refrigerant recycling function
After entering refrigerant recycling mode, when receive any remote control signal or enter refrigerant recycling mode for 25min, the
unit will exit refrigerant recycling mode automatically If the unit is in standby mode before refrigerant recycling, it will be still in standby
mode after finishing refrigerant recycling; if the unit is in ON status before refrigerant recycling, it will still run in original operation
mode.
(15) Compulsive 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 on indoor unit
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.
Installation and Maintenance
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