Haier GE APPLIANCES Connect Series, Service Manual

Page: 24 / 102

CONNECT SERIES SERVICE MANUAL
22
ENGLISH
Troubleshooting
Troubleshooting
No
Yes
Yes No
Completely
open the liquid
valve and
gas valve of
outdoor unit
Start
E1 protection
Check if the system high
pressure is higher than 667psi
Check if the liquid
valve and gas valve
of outdoor unit
open completely
Check if the air
outlet of outdoor
fan motor or indoor
fan motor is normal
Check if the indoor
and outdoor
operating ambient
temperature is
within normal range
Yes
Yes
No
No
Reconnect
wire
according to
the circuit
diagram
Replace the high
pressure switch
Replace the
outdoor main
board
Check if the wiring
of high pressure
switch is correct
Check if the high
pressure switch
works normally
Yes
“E1” Compressor High
Pressure Protection
Error display:
ODU main board LED display
Error judgment condition
and method:
It is judged through the action
of high pressure switch. If the
high pressure switch is cut off,
it is judged that high pressure is
too high and the system stops
operation for protection.
Possible causes:
• Cut-off valve of ODU is not
fully opened
• High pressure switch is
abnormal
• Outdoor or indoor fan is not
working properly
• IDU filter or air duct is
blocked (heating mode)
• Ambient temperature is too
high
• System is overcharged
• Refrigerant line set is blocked
Clear the
obstacle at
indoor and
outdoor air
outlet or air
return port to
ensure smooth
air outlet
Operate the unit
in normal ambient
temperature range
specified in user’s
manual
No