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3) Check the system pressure, recharge refrigerant if the pressure is low, and discharge some
refrigerant if the pressure is too high.
4) Check the outdoor ventilation and if there is any obstruction that affects the normal radiating of the air
conditioner, and installation again.
5) If the above inspections are normal, but the fault remains unsolved, please replace the outdoor PCB.
Re-energize and check the protection code on display. Firstly display P9.
a) Check the U,V, W connection, if is correctness or loose please connect again.
b) If this code is displayed when the compressor is started for several seconds or even not started,
check the compressor connection for correctness, if no insert wrong, replace outdoor PCB.
11.3.8 Display EU.
Reason:
Voltage sensor damage.
Solution: Please replace outdoor PCB.
11.3.9 Display EE
Reason:
EEPROM fault.
Solution: Shut down power supply and reenergize it, if the fault remains there, check the EEPROM
installation, if no problem, please replace outdoor PCB.
11.3.10 Display E4
Reason:
IPM high current protection or Compressor phase loss or the power off
Solution: 1. Check the compressor phase whether loss.
2. If the compressor phase not loss, please cut the power off and give again. If the unit can
run at normal, maybe the IPM high current protection or the power off
Air Conditioner Service Manual
Fixing screw
Heat radiation problem easily happened
while the screw is not fixed tightly.
U, V, W connection
EEPROM
Voltage sensor
instantaneously
.
instantaneously.
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