Gree KW09HQ3D6D Series Service Manual page 48

Service Manual
Malfunction
Dual-8
NO.
Name
Code
Display
The four-way
valve is
26
abnormal
Overcurrent
protection of
27 phase
current for
compressor
Charging
malfunction
28 PU
of capacitor
Malfunction
of module
29
temperature
sensor circuit
Module high
30 temperature
protection
Decrease
frequency
due to high
temperature
31
resistant
during
heating
operation
Malfunction
32
of detecting
plate(WIFI )
Overload
33 protection for
compressor
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
U7
P5
P7
P8
H0
JF
H3
A/C status
If this malfunction occurs
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.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling operation,
compressor will stop while
indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally,
while
operation frequency for
compressor is decreased
Loads operate normally,
while the unit can't be
normally controlled by APP.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Possible Causes
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened or
broken;
3.4V is damaged, please replace
4V.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
Refer to the part three—charging
malfunction analysis of capacitor
Replace outdoor control panel AP1
After the complete unit is de-
energized for 20mins, check
whether the thermal grease on IPM
Module of outdoor control panel
radiator is inserted tightly. If its no
use, please replace control panel
AP1.
Refer to the malfunction analysis
(overload, high temperature
resistant)
1. Main board of indoor unit is
damaged;
2. Detection board is damaged;
3. The connection between
indoor unit and detection board
is not good;
1. Wiring terminal OVC-COMP
is loosened. In normal state, the
resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis (
discharge protection, overload)
45