Maintenance; Error Code - Gree GWH07PA-K3NNA6E Service Manual

Service Manual

9. Maintenance

9.1 Error code

No. Malfunction
Name
Indoor ambient
temperature
1 sensor is
open/short-
circuited
Indoor
evaporator
temperature
2
sensor is
open/short-
circuited
Blocked
3 protection of
IDU fan motor
Malfunction
4 protection of
jumper cap
Zero-crossing
inspection
circuit
5
malfunction
of the IDU fan
motor
Installation and Maintenance
Display Method of Indoor Unit
Indicator lamp (Only for
the unit with indictor;
Error
during blinking, ON for
Code
0.5S and OFF for 0.5S)
Operation COOL HEAT
Lamp Lamp Lamp
Blinks
once
F1
every
3s
Blinks
twice
F2
every
3s
Blinks
H6 11 times
every 3s
Blinks 15
C5 times
every 3s
Blinks 17
U8 times
every 3s
A/C Status
The unit will stop operation
as it reaches the temperature
point. During cooling and
drying operation, except IDU
fan motor operates, other
loads stop operation; During
heating operation, the system
stops operation.
The unit will stop
operation as it reaches
the temperature point.
During cooling and drying
operation, except IDU fan
operates, other loads stop
operation; During heating
operation, the complete unit
stops operation.
IDU fan, ODU fan,
compressor and electric
heat tube stop operation.
Horizontal louver stops at the
current position.
Operation of remote
controller or control panel is
available, but the unit won't
act.
Operation of remote
controller or control panel is
available, but the unit won't
act.
Possible Causes(For specific maintenance
method, please refer to the following procedure
of troubleshooting)
1. The wiring terminal between indoor ambient
temperature sensor and main board is loosened
or poorly contacted;
2. There's short circuit due to trip-over of the parts
on controller;
3.Indoor ambient temperature sensor is damaged
(Please check it by referring to the resistance
table for temperature sensor)
4. Main board is broken.
1. The wiring terminal between indoor evaporator
temperature sensor and main board is loosened
or poorly contacted;
2. There's short circuit due to the trip-over of the
parts on controller;
3. Indoor evaporator temperature sensor is
damaged (Please check it by referring to the
resistance table for temperature sensor)
4. Main board is broken.
1. The feedback terminal of PG motor is not
connected tightly.
2. The control terminal of PG motor is not
connected tightly.
3. Fan blade rotates unsmoothly.
4. Malfunction of motor
5. Main board is broken.
1. There's not jumper cap on the main board.
2. Jumper cap is not inserted properly and tightly.
3. Jumper cap is damaged.
4. Controller is damaged.
1. Quick de-energization and energization. Wrong
judgement by the controller because the electric-
discharging of capacitor is slow.
2. Zero-crossing inspection circuit of main board
for controller is abnormal.
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