Gree GEH09AA-K6DNA1F Service Manual page 48

Service Manual
Display Method of
Malfunction
No.
Name
Malfunction
of complete
43
units current
detection
The four-way
44 valve is
abnormal
Cold air
45 prevention
protection
Heating indicator off for
46 Defrosting 0.5s and then blinks for
Refrigerant
47 recovery
mode
Malfunction
of zero-cross
48
detection
circuit
Malfunction
of detecting
49
plate(WIFI )
Installation and Maintenance
Indoor Unit
Dual-8
A/C status
Code
Display
During cooling and drying
operation, the compressor will
stop while indoor fan will
U5 operate;
During heating operating,
the complete unit will stop
operation.
If this malfunction occurs
during heating operation,
U7
the complete unit will stop
operation.
Not the error code. It's the
E9
status code for the operation.
Not the error code. It's the
status code for the operation.
10s
Refrigerant recovery. The
Fo Serviceman operates it for
maintenance.
U8 The complete unit stops
Loads operate normally,
while the unit can't be
JF
normally controlled by APP.
Possible Causes
Theres circuit malfunction on
outdoor units control panel AP1,
please replace the outdoor units
control panel AP1.
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened or
broken;
3.4V is damaged, please replace
4V.
1.Power supply is abnormal;
2.Detection circuit of indoor control
mainboard is abnormal.
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;
45