Error Codes And Troubleshooting - Navien COMFORT MATE EQH-20WUS Installation Instructions Manual

Error Codes and Troubleshooting

When an error code continuously appears on the status window, contact a the
distributor or Navien Technical Support(1-877-689-1541) for further assistance.
Error
Error Description
Number
E016
Overheating of water tank
E017
Abnormal heating error
E205
Tank temperature sensor error
Water temperature (left side)
E218L
sensor error
Water temperature (right side)
E218R
sensor error
E228
Water leakage error
E302
Water level error
E311
Water level sensor error
27
Possible Solution
Contact the distributor or Navien Technical Support
Contact the distributor or Navien Technical Support
Contact the distributor or Navien Technical Support
Contact the distributor or Navien Technical Support
Contact the distributor or Navien Technical Support
1. Turn off the boiler
2. Check the location of water leakage
in the boiler and the mattress and stop
operating the product.
3. Contact the distributor or Navien Technical
Support
1. This is an error caused by insufficient
amount of water.
2. Follow the instruction provided in P15 to
supplement water.
Contact the distributor or Navien Technical Support