Electra AWAU-VBZE218-H11, Service Manual, Page: 42 / 58

Service Manual – V BZE DCI 1-A.1 GB
TROUBLESHOOTING
13–3
Fault description
2* 7
segments
LEDs blinking
Possible Reason
RUN COOL HEAT
Compressor overload
protection
H3 3
1. EEV connection problem or damaged
2. Refrigerant leakage
3. OLP damaged
Compressor overload
protection
H3 3
1. EEV connection problem or damaged
2. Refrigerant leakage
3. OLP damaged
IPM protection H5 5
1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
PFC protection HC 6
1. PFC module assembly problem.
2. Poor heat exchange of Heatsink
3. PFC reactor problem.
4. Abnormal power voltage
5. PFC circuit problem on PCB
Desynchronizing of
compressor
H7 7
1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
Compressor start-up failure Lc 11
1. Compressor wiring mistake
2. Over charged system
3. System not balanced before compressor starting
4. Compressor problem
Compressor phase current
detection problem
U1 12
Phase current detection circuit for compressor has
problem.
DC over current P5 15
1. Abnormal power input voltage.
2. Compressor wiring mistake.
3. Liquid and gas valve are not open.
4. EEV damaged or not proper working
5. Poor heat exchange.
6. Over charged system.
Charging malfunction of
capacitor
PU 17
1. Reactor open
2. Charging relay or other components damaged on
PCB.
HST failure P7 18
1. Senor was broken or damaged
2. PCB temperature detection circuit has problem
HST over heating protection P8 19
1. Insufficient attachment of IPM module to Heatsink
2. Outdoor PCB problem.
DC under voltage PL 21
1. AC input voltage is too low
2. Reactor has problem
3. ODU PCB has problem
Lack Phase Protection of
Compressor
Ld
1. Compressor wiring problem
2. Compressor problem
3. IPM module problem or compressor current
detection circuit has problem
4. Compressor malfunction due to EEV problem