Sanden GAUS-315EQTD Installation Manual page 23

HP inlet temperature thermistor wire
E010
break
HP inlet temperature thermistor
E011
short circuit
HP outlet temperature thermistor
E012
wire break
HP outlet temperature thermistor
E013
short circuit
HP ambient temperature thermistor
E014
wire break
HP ambient temperature thermistor
E015
short circuit
HP defrost temperature thermistor
E016
wire break
HP defrost temperature thermistor
E017
short circuit
HP discharge temperature
E018
thermistor wire break
HP discharge temperature
E019
thermistor short circuit
E020 Tank thermistor wire break
E021 Tank thermistor short circuit
E040 HP water outlet over temperature 1
E041 HP water outlet over temperature 2
HP outlet temperature thermistor
E042
detection error
E043 HP discharge over temperature 1
HP discharge temperature
E044
Thermistor detection error
E045 HP defrost thermistor detection error
E047 High pressure side error
Sanden Heat Pump – Installation Manual
Page 23 of 33
Check the thermistor connectors on the
main PCB 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
- Check the heat pump piping filter for
blockage/debris
- Check for any piping bend, blockage or
kinking
- Inspect for frozen pipes
- Ensure mains water supply is available
- Ensure all shut off valves are open
- If the water circulation pump is not
working, replace the pump
- Check if the thermistor is out of the
mounting pocket on the water outlet pipe
- Replace the discharge temp thermistor
- Reconnect the expansion valve PCB
connector, check to ensure connection
- Replace the expansion valve (together
with PCB), or the entire heat pump unit
- Check if the thermistor is mounted in
position on the evaporator
- Replace the defrost thermistor
- Check the heat pump piping filter for
any blockage
- Check for any piping bend, blocking or
kink