Gree GWH07AFAXA-K3NNA1A Service Manual page 68

Service Manual
No. Malfunction Name
Communi-
cation
13
malfunction
Overload
14
malfunction
Overload
15 protection for
compressor
16 Defrosting
Installation and Maintenance
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling operation, compressor stops
E6 while indoor fan motor operates. During
heating operation, the complete unit stops.
E8 The entire unit stops.
H3 The entire unit stops.
Heating indicator
Not the error code. It's the status code for
off for 0.5s and
the operation.
then blinks for 10s
A/C status
1. The communication line is not connected
tightly or poorly contacted.
Poor contact of any line may cause
communication malfunction.
2. The match between main board and
display panel is incorrect. Indoor and
outdoor unit boards are matched incorrectly.
3. Incorrect wire connection.
4. Controller is damaged.
1. Indoor and outdoor heat exchanger is
too dirty?
Or air inlet/outlet is blocked?
2. Fan motor doesn't work at a normal
fan speed; fan speed is too low or the fan
doesn't run.
3. Compressor operates normally or not?
Is there any
abnormal noise or oil leak? Casing is too
hot?
4 . S y s t e m i s b l o c k e d i n s i d e ? ( D i r t
blockage? Ice blockage?
Oil blockage? Y-valve is not fully open?)
5. Main board temperature sensor detects
wrongly.
1. Outdoor and indoor heat exchangers are
too dirty or the air inlet/outlet is blocked.
2. Fan motor doesn't work at a normal
fan speed; fan speed is too low or the fan
doesn't run.
3. Compressor doesn't work normally.
S t r a n g e n o i s e o r l e a k a g e o c c u r s .
Temperature of the shell is too high.
4. System is blocked inside(dirt block, ice
block, oil block, Y-valve not fully open).
5. High pressure switch is abnormal
6. The refrigerant is leaking and cause
overheating protection to compressor
Possible Causes
65