ECO2 Systems SANCO2 GS4-45HPC Installation Manual page 27

H6 Compressor revolution error
U0 Refrigerant leakage error
Main PCB error
E1
E2
Control PCB error
L7
Communication error between
F5
main PCB to control PCB
E8 High inlet current error
H8 Current error
L4 High temperature of module error
L5 High outlet current error
P4 Module temperature thermistor error
U2 High voltage error
HJ Water circuit error
EC High water outlet error
- Check the supply voltage.
- Measure resistance of each thermistors.
- Measure resistance of coil of expansion valve
to check open or short circuit.
- Replace the PCB or heat pump.
- Measure resistance of each thermistors.
- Measure resistance of coil of expansion valve
to check open or short circuit.
- Replace the main PCB or heat pump.
- Replace the main PCB.
- Replace the control PCB.
- Check the communication connector on the
main PCB and control PCB.
- Replace the main PCB or control PCB.
- Check the installation location.
- Check the supply voltage.
- Replace the main PCB or heat pump.
- Replace the main PCB.
- Check the installation location.
- Remove foreign objects from the evaporator
coil (e.g. fallen leaves, grass, snow)
- Check the Fan motor is not flowing by dirt.
- Replace the main PCB or fan motor.
- Measure resistance of the discharged
thermistor.
- Measure resistance of coil of expansion valve
to check open or short circuit.
- Replace the main PCB or heat pump.
- Replace the main PCB.
- Check the supply voltage.
- Check the inlet water valve.
- Check for any piping bend, blocking, kink or
frozen.
- Measure resistance of each Thermistor.
- Measure resistance of coil of expansion valve
to check open or short circuit.
- Replace the main PCB or heat pump.
- Check the water circuit is not flowing by air, dirt
or scaling.
- If the water circulation pump is not working,
replace the pump.
- Measure resistance of water outlet（outgoing）
thermistor.
- Replace the main PCB.
Sanden Heat Pump – Installation Manual
SANCO Heat Pump – Installation Manual
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