Gree GWH09TB-D3DNA1A Service Manual page 55

Display Method of Indoor Unit
Malfunction
NO.
Name
Indicator Display (during
Dual-8
blinking, ON 0.5s and OFF 0.5s)
Code
Operation
Display
Indicator
High
OFF 3s
pressure
1 E1 and blink
protection of
once
system
OFF 3S
Antifreezing
2 E2 and blink
protection
twice
High
discharge OFF 3S
3 temperature E4 and blink 4
protection of times
compressor
OFF 3S
Overcurrent
4 E5 and blink 5
protection
times
Communi- OFF 3S
5 cation E6 and blink 6
Malfunction times
High
temperature OFF 3S
6 resistant E8 and blink 8
protection times
Internal
OFF 3S
motor (fan
7 H6 and blink
motor) do not
11 times
operate
Malfunction OFF 3S
8 protection of C5 and blink
jumper cap 15 times
Indoor
ambient
temperature
9 F1
sensor is
open/short
circuited
Overcurrent
protection of
10 phase P5
current for
compressor
Display Method of
Outdoor Unit
(Indicator has 3 kinds
of display status and
they will be displayed
circularly every 5s.)
□OFF
■Illuminated
Cool Heating
D5 D6
(D40) (D41)
Indicator Indicator
OFF 3S
and blink
once
OFF 3S
and blink
15 times
A/C status
Blink
D16 D30
(D42) (D43)
During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
During cooling operation,
compressor stops while indoor
fan motor operates. During
heating operation, the complete
unit stops.
During cooling operation:
compressor will stop while
indoor fan will operate. During
heating operation, the complete
unit stops.
Internal fan motor, external fan
motor, compressor and electric
heater stop operation,guide
louver stops at present location.
Wireless remote receiver and
button are effective, but can
not dispose the related
command
During cooling and drying
operation, indoor unit operates
while other loads will stop;
during heating operation,
the complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Possible Causes
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including
and bad radiating environment );
Ambient temperature is too high.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
Please refer to the malfunction
analysis (discharge protection,
overload).
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
Refer to the corresponding
malfunction analysis.
Refer to the malfunction analysis
(overload, high temperature
resistant).
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev
detecting circuit.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
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.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.