Gree Dettson LOMO 19 Installation Manual page 64

Service Manual
No. Malfunction Name
37 power protection
Indoor unit and outdoor
38
unit doesn't match
39 Failure start-up
Cold air prevention
40
protection
Anti-freezing rotection
41
for evaporator
Malfunction of phase
42 current detection circuit
for compressor
Malfunction of voltage
43
dropping for DC bus-bar
Malfunction of complete
44
unit's current detection
The four-way valve is
45
abnormal
Malfunction of zero-cross
46
detection circuit
Installation and Maintenance
Display Method of
Indoor Unit
Dual-8 Code
Display
compressor stop operation and Outdoor fan
L9 motor will stop 30s latter , 3 minutes latter fan
motor and compressor will restart
LP compressor and Outdoor fan motor can't work
During cooling and drying operation, compressor
will stop while indoor fan will operate;
LC
During heating operation, the complete unit will
stop operation.
E9
E2
During cooling and drying operation, compressor
will stop while indoor fan will operate;
U1
During heating operation, the complete unit will
stop
During cooling and drying operation, compressor
will stop while indoor fan will operate;
U3
During heating operation, the complete unit will
stop
During cooling and drying operation, the
compressor will stop while indoor fan will operate;
U5
During heating operating, the complete unit will
stop operation.
If this malfunction occurs during heating
U7
operation, the complete unit will stop operation.
U8 The complete unit stops
A/C status
To protect the electronical components when
detect high power
Indoor unit and outdoor unit doesn't match
Refer to the malfunction analysis
Not the error code. It's the status code for
the operation.
Not the error code. It's the status code for
the operation.
Replace outdoor control panel AP1
Supply voltage is unstable
There's circuit malfunction on outdoor unit control
panel AP1, please replace the outdoor unit
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.
Possible Causes
61