Gree GRS-CQ8.0Pd/NhG3-E

Air-to-water Heat Pump
61
MONOBLOC
TYPE
(3) Comp discharge temp protection E4
Compressor discharge temperature Protection E4
Does the discharge
temperature reach 120°C?
Replace the electronic
expansion valve.
No
Yes
Yes
No
Refrigerant is not enough
and add refrigerant according
to the required volume.
Yes
Replace the discharge
temperature sensor.
Is the resistance of the
sensor incorrect?
Yes
Replace the mainboard
of the outdoor unit.
No
Is the electronic
expansion valve broken?
Is the system leaked?
Repair the leakage and
add refrigerant according
to the required volume.
No
(4) Outdoor fan error EH
Outdoor fan error EH
Is the mainboard of the
outdoor unit damaged?
Is the wire of terminals
of the mainboard broken?
Yes
Replace the mainboard
of the outdoor unit.
Replace the wire.
Yes
No