ECO2 Systems SANCO2 GS4-45HPC-D Installation Manual page 27

Error
Error contents
code
EC High water outlet error
F3 Discharged temperature error
Communication error between main PCB
F5
to control PCB
FA High pressure side error
H0 High water outlet error
H3 Pressure switch error
H6 Compressor revolution error
H7 Tank temperature thermistor error
H8 Current error
- 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.
- Measure resistance of the discharged thermistor.
- Replace the main PCB or heat pump.
- Check the communication connector on the main
PCB and control PCB.
- Replace the main PCB or control PCB.
- Check the heat pump piping for any blockage.
- Check for any piping bend, blockage or kink.
- Check if the pipes are frozen.
- Ensure mains water supply is available.
- Ensure all shut off valves are open.
- If the water circulation pump is not working, replace
the pump.
- In areas with hard water ensure Gas Cooler is not
scaled up, descale if necessary.
- 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 thermostat.
- Replace the main PCB.
- Check the thermistor connectors on the main PCB or
control PCB in the heat pump unit for any disconnect,
fall-off, wire breakage or short circuit.
- Replace the main PCB.
- 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.
- Check the thermistor cable on the terminal
block in the heat pump unit for any disconnect, fall-
off, wire breakage or short circuit.
- Measure resistance of the thermistor indicated by
the error code.
- Replace the main PCB.
SANCO Heat Pump – Installation Manual
2
Page 27 of 44
Corrective action