Error Codes - Sanden GS3-45HPA-US Installation Manual

Error Codes

When an error has occurred, a red LED on the operation panel turns on and an error code
is displayed on the LED display. The panel does not revert to the display sleep mode while
the error code is shown.
Figure 14 Error Code example
After a component is replaced or the inspection is completed, turn the breaker OFF for a
period of 3 minutes before restarting 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 is highly likely.
Error
code
E001 HP water outlet over temperature 1
E002 HP water outlet over temperature 2
HP outlet temperature thermistor
E003
detection error
E004 HP discharge over temperature 1
E005 HP discharge over temperature 2
HP discharge temperature
E006
Thermistor detection error
E007 High pressure side error
Error contents
Sanden Heat Pump – Installation Manual
Page 24 of 36
Corrective action
- Check the heat pump piping for
blockage/debris
- Check for any piping bend, blockage or
kinking
- Check pipes are not 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
- 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 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