Haier GE APPLIANCES Connect Series, Service Manual

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CONNECT SERIES SERVICE MANUAL
27
ENGLISH
Troubleshooting
No
No
No
Yes
Yes
Yes
Yes
“EE” ODU Memory Chip Error
Error display:
ODU main board LED display
Error judgment condition and method:
If ODU main board cannot read the memory chip, this
error will be reported.
Possible causes:
• Memory chip on the ODU main board is damaged.
• Memory chip is weakly soldered.
• Memory chip lead is short-circuited.
“H4” Overload
Error display:
ODU main board LED display
Error judgment condition and method:
When condensing pressure is higher than the protection
value, system will report overload protection.
Possible causes:
• Cooling ODU heat exchanger is blocked or heat
exchange is bad.
• Heating IDU heat exchanger is blocked or heat
exchange is bad.
• Operating temperature is too high.
• System is over charged
Start
Malfunction of ODU memory
chip error
Replace the outdoor main
board
Yes
No
Start
H4 Overload
Outdoor coil is blocked
Remove the
obstacle
Remove the
obstacle
Normal protection.
No need to handle it.
Release a proper
amount of refrigerant
Replace the
compressor
Indoor coil is blocked
Ambient
temperature is out
of the operation
range
System is over
charged
Replace the
drive board
Error still
exists?