Gree GWH12MB-K3DNE3G Service Manual page 37

Display Method of Indoor Unit
Malfunction
Dual-8
NO.
Name
Code
Display
Compressor
intermediate
26 P3
frequence in
test state
Overcurrent
protection of
27 phase P5
current for
compressor
Charging
malfunction
28 PU
of capacitor
Malfunction
of module
29 P7
temperature
sensor circuit
Module high
30 temperature P8
protection
Decrease
frequency
due to high
temperature
31
resistant
during
heating
operation
Static
32 dedusting
protection
Overload
33 protection for H3
compressor
34
Indicator has 3 kinds of
Indicator Display (during
display status and during
blinking, ON 0.5s and OFF
blinking, ON 0.5s and OFF
0.5s)
0.5s
Operation Cool Heating
Indicator Indicator Indicator Indicator
(during (during
blinking, blinking,
ON ON
0.25s 0.25s
and OFF and OFF
0.25s) 0.25s)
OFF 1S
and blink
Display Method of Outdoor
Unit
Yellow Red Green
Indicator Indicator
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
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
8 times
complete unit will stop
operation.
A/C status Possible Causes
Showing during middle cooling or
middle heating test
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. 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)
Installation and Maintenance
Service Manual