Gree GWH09AGA-K6DA1A Service Manual page 68

Service Manual
Dual-8
Malfunction
No.
Name Code
Display
Gathering
10 Fo
refrigerant
Indoor
ambient
temperature
11 F1
sensor is
open/short
circuited
Indoor
evaporator
temperature
12 F2
sensor is
open/short
circuited
Outdoor
ambient
temperature
13 F3
sensor is
open/short
circuited
Outdoor
condenser
temperature
14 F4
sensor is
open/short
circuited
Outdoor
discharge
temperature
16 F5
sensor is
open/short
circuited
Limit/
decrease
17 frequency F6
due to
overload
Decrease
frequency
18 F8
due to
overcurrent
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation Cool Heating
Indicator Indicator Indicator
A/C status
When the outdoor unit receive signal of
Gathering refrigerant ,the system will
be forced to run under cooling mode for
gathering refrigerant
During cooling and drying
operation, indoor unit operates
while other loads will stop; during heating
operation, the complete unit will stop
operation.
AC stops operation once
reaches the setting
temperature. Cooling, drying:
internal fan motor stops
operation while other loads
stop operation; heating: AC
stop operation
During cooling and drying
operating, compressor stops while indoor
fan operates; During heating operation,
the complete unit will stop operation
During cooling and drying
operation, compressor stops while indoor
fan will operate; During heating operation,
the complete unit will stop operation.
During cooling and drying
operation, compressor will sop
after operating for about 3 mins,
while indoor fan will operate;
During heating operation, the
complete unit will stop after
operating for about 3 mins.
All loads operate normally, while
operation frequency for
compressor is decreased
All loads operate normally, while
operation frequency for
compressor is decreased
Possible Causes
Nominal cooling mode
1. Loosening or bad contact of
indoor ambient temp. sensor and
mainboard terminal.
2. Components in mainboard fell
down leads short circuit.
3. Indoor ambient temp. sensor
damaged.(check with sensor
resistance value chart)
4. Mainboard damaged.
1. Loosening or bad contact of Indoor
evaporator temp. sensor and
mainboard terminal.
2. Components on the mainboard fall
down leads short circuit.
3. Indoor evaporator temp. sensor
damaged.(check temp. sensor value
chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor hasnt been
connected well or is damaged. Please check
it by referring to the resistance table for
temperature sensor)
Outdoor temperature sensor hasnt been
connected well or is damaged. Please check
it by referring to the resistance table for
temperature sensor)
1.Outdoor temperature sensor hasnt been
connected well or is damaged. Please check it
by
referring to the resistance table for temperature
sensor)
2.The head of temperature sensor hasnt been
inserted into the copper tube
Refer to the malfunction analysis (overload,
high temperature resistant)
The input supply voltage is too low;
System pressure is too high and overload
65