“E1” Compressor High Pressure Protection; Error Judgment Condition; Troubleshooting - Haier GE APPLIANCES Connect Series Service Manual

Troubleshooting

Troubleshooting
"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
22
Check if the liquid
valve and gas valve
of outdoor unit
open completely
Yes
Check if the air
outlet of outdoor
fan motor or indoor
fan motor is normal
No
Yes
Clear the
Check if the indoor
obstacle at
and outdoor
indoor and
operating ambient
outdoor air
temperature is
outlet or air
within normal range
return port to
ensure smooth
air outlet
Operate the unit
in normal ambient
temperature range
specified in user's
manual
CONNECT SERIES SERVICE MANUAL
Start
E1 protection
Check if the system high
pressure is higher than 667psi
Yes No
Check if the wiring
of high pressure
switch is correct
No
Completely Check if the high
pressure switch
open the liquid
works normally
valve and
gas valve of
outdoor unit
Yes
Replace the
outdoor main
board
No
Yes
Reconnect
wire
according to
the circuit
diagram
No
Replace the high
pressure switch