Sanden
Heat
Pump
–
Installation
Manual
Page
17
of
26
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
Error
contents
Corrective
action
E000
No error generated
E010
HP inlet temperature thermistor wire
break
Check the thermistor connectors on the
main PCB in the heat pump unit for any
disconnection, fall-off, wire breakage or
short circuit
E011
HP inlet temperature thermistor
short circuit
E012
HP outlet temperature thermistor
wire break
E013
HP outlet temperature thermistor
short circuit
E014
HP ambient temperature thermistor
wire break
E015
HP ambient temperature thermistor
short circuit
E016
HP defrost temperature thermistor
wire break
E017
HP defrost temperature thermistor
short circuit
E018
HP discharge temperature
thermistor wire break
E019
HP discharge temperature
thermistor short circuit
E020 Tank
thermistor a wire break
E021
Tank thermistor a short circuit
E040
HP water outlet over temperature 1
- 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
E041
HP water outlet over temperature 2
E042
HP outlet temperature thermistor
detection error
- Check if the thermistor is off the
mounting pocket on the water outlet pipe
E043
HP discharge over temperature 1
- Replace the discharge temperature
thermistor
E044
Hp discharge temperature