Gree Dettson LOMO 19 Installation Manual page 63

No. Malfunction Name
Charging
28 malfunction of capacitor
Malfunction of module
29
temperature sensor circuit
Module high temperature
30
protection
Overload protection for
31
compressor
32 IPM protection
Module temperature is too
33
high
Internal motor (fan motor)
34
do not operate
Desynchro-nizing of
35
compressor
Outdoor DC fan motor
36
malfunction
60
Display Method of
Indoor Unit
Dual-8 Code
Display
During cooling and drying operation, compressor
will stop while indoor fan will operate;
PU
During heating operation, the complete unit will
stop
During cooling and drying operation, compressor
will stop while indoor fan will operate;
P7
During heating operation, the complete unit will
stop
During cooling operation, compressor will stop
P8 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;
H3
During heating operation, the complete unit will
stop operation.
During cooling and drying operation, compressor
will stop while indoor fan will operate;
H5
During heating operation, the complete unit will
stop operation.
During cooling and drying operation, compressor
P8 and outdoor fan stop while indoor fan operates.
During heating operation, all loads stop.
Internal fan motor, external fan motor, compressor
H6 and electric heater stop operation,guide louver
stops at present location.
During cooling and drying operation, compressor
will stop while indoor fan will operate;
H7
During heating operation, the complete unit will
stop operation.
Outdoor DC fan motor malfunction lead to
L3
compressor stop operation,
A/C status
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 AP1 is
sufficient and whether the radiator is inserted
tightly. If it's no use, please replace control panel
AP1.
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)
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
Radiating grease on IPM module of
outdoor unit main board is not enough;
screws have not been fixed tightly;
Hardware malfunction of outdoor unit main board;
1. Bad contact of DC motor feedback terminal.
2. Bad contact of DC motor control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard revdetecting circuit.
Refer to the malfunction analysis (IPM protection,
loss of synchronism protection and overcurrent
protection of phase current for compressor.
DC fan motor malfunction or system blocked or
the connector loosed
Service Manual
Possible Causes
Installation and Maintenance