Haier GE APPLIANCES Connect Series, Service Manual

Page: 32 / 102

CONNECT SERIES SERVICE MANUAL
30
ENGLISH
Troubleshooting
“Lc” Startup Failure
Error display:
ODU main board LED display
Error judgment condition and method:
Check the error code on 7 segment LED display of ODU
main control board. Inverter compressor startup failure
is indicated by a PJ on the display.
Possible causes:
• Poor contact of compressor U, V, W wire
• Compressor is faulty
• Compressor drive board is faulty
“P0” Driver Reset Protection
Error display:
ODU main board LED display
Error judgment condition and method:
Drive board chip resets and starts initialization. After the
drive board is energized for 5s, it detects that the chip
resets again. In this case, it can be judged as drive chip
reset protection.
Possible causes:
• 3.3V drive chip supply voltage drop.
• TRST lead of JTAG programming is interrupted.
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Start
Start
LC Startup failure
P0 Driver reset protection
System is blocked?
3.3V drive board voltage
is normal or not?
Eliminate
system
failure
Re-arrange the wires.
Heavy current wires
should avoid the drive
board chip.
Replace the
drive board
Fill refrigerant in.
Fill compressor
oil in.
Connect wires
according to the
correct sequence.
Reconnect wires
or replace the
compressor wires
Replace the
compressor
Short of refrigerant?
Short of compressor oil?
Compressor
3-phase sequence
is correct or not?
Compressor
3-phase wires are
loose or badly
connected?
Replace the
drive board
Error still
exists?