Gree GRS-CP11Pd/NhA-K - Main Control Fault Information

Heat Pump Pool Heater
23
6.4 Main Control Fault Information
Error Code Error Name Possible Causes Solution
E1
High-pressure
protection
Insufficient water flow;
Poor contact caused by loose
pressure switch wire;
Abnormal pressure switch;
Main board fault;
Abnormal heat exchange of
water-side heat exchanger;
Over-high ambient temperature.
After the fault is
repaired, power on
again to recover.
E3
Low-pressure
protection
Poor contact caused by loose
pressure switch wire;
Abnormal pressure switch.
E4
Discharge
protection
Abnormal resistance value of the
exhaust temperature sensor;
Unit refrigerant leakage or
insufficient refrigerant.
E6
Communication
fault
Loose or damaged communication
line wiring;
Display board fault;
Main board fault.
Automatic recovery
after fault repair.
F3
Ambient
temperature
sensor fault
Damaged temperature sensor;
Main board fault.
F4
Discharge
temperature
sensor fault
F6
Outdoor heat
exchanger tube
temperature
sensor fault
Fd
Suction
temperature
sensor fault
F8
Water inlet
temperature
sensor fault
F9
Water outlet
temperature
sensor fault
L6
Out of operating
range
The ambient temperature exceeds
the operating range of the unit.
-
Ec
Water flow switch
protection
Insufficient water flow;
Water flow switch fault;
Loose water flow switch wire.
Automatic recovery
after fault repair.
C5 Jumper cap fault
Wrong jumper cap;
Poor contact of jumper cap.