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Error Codes
When an error has occurred, a red LED on the timer setting panel turns on and an error
code is displayed on the LED display. The panel does not turn to the display sleep mode
while the error code is shown.
After a component is replaced or the inspection is completed, turn the breaker on/off
several times to confirm the error does not re-occur.
Below is the list of the error codes. If the corrective action does not solve the error problem,
a malfunction of the PCB valve is highly likely.
Error
code
E000
No error generated
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 a wire break
E021
Tank thermistor a 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
Error contents
Sanden Heat Pump – Installation Manual
Check the thermistor connectors on the
main PCB in the heat pump unit for any
disconnection, fall-off, wire breakage or
short circuit
- Check the heat pump piping filter for
any blockage
- Check for any piping bend, blockage or
crush
- Inspect for frozen pipes
- Open the valve on water mains
- Open the stop valves
- If the water circulation pump is not
moving, replace the pump
- Check if the thermistor is off the
mounting pocket on the water outlet pipe
- Replace the discharge temperature
thermistor
Page 17 of 26
Corrective action
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