Troubleshooting - GRE HPM20 Manuel D'instructions

7. Trouble shooting
7.1 Error code on the LED controller
Malfunction
Too low or too high
ambient temperature
protection
Water temperature sensor
failure
Ambient temperature
sensor failure
Low pressure protection
Code Reason
1. Ambient temperature is
out of operating range:
P0
12℃- 42℃.
2. Controller failure.
Water temperature sensor
P1
open circuit or short circuit.
Ambient temperature sensor
P2
open circuit or short circuit.
1. Low pressure switch
disconnected or failure.
EL
2. Gas leakage.
1. Wait the ambient temperature
to rise to 13℃ or to cool down
to 40℃ and restart.
2. Replace the new controller.
Replace the new water
temperature sensor.
Replace the new ambient
temperature sensor.
It must be repaired by the
professional technicians.
27
Solution