AERCO Esteem O&M Manual - Manual (Page 87)

81
GF-125
E 15
Internal Failure
Reset the boiler control module and retry ignition sequence and boiler operation. If problem continues, contact AERCO International Technical Support for additional assistance.
E 16
Internal Failure
Reset the boiler control module and retry ignition sequence and boiler operation. If problem continues, contact AERCO International Technical Support for additional assistance.
E 17
Internal Failure
Reset the boiler control module and retry ignition sequence and boiler operation. If problem continues, contact AERCO International Technical Support for additional assistance.
E 18
High Temperature Limit, Supply Temperature Boiler supply water temperature exceeds 212
ºF.
•
Check the following. •
The boiler and heating system are filled with water and the LWCO is operating properly.
•
The boiler and heating system have been properly purged and there is no trapped air.
•
Inspect heating system piping and its components. Ensure piping is per the recommenda- tions given in this Installation Manual or other approved design configurations.
•
Use a device to measure the supply water temperature leaving the boiler. Compare this measured temperature with the display temperature (See page 52.) •
Replace supply temperature sensor if temperature comparison is off by more than 10
ºF.
E 19
High Temperature Limit, Return Temperature Boiler return water temperature exceeds 212
ºF.
Check the following:
•
The boiler and heating system are filled with water and the LWCO is operating properly.
•
The boiler and heating system have been properly purged and there is no trapped air.
•
Inspect heating system piping and its components. Ensure piping is per the recommenda- tions given in this manual or other approved design configurations.
•
Ensure boiler piping is correct and water flow is not reversed nor pipes cross-connected.
•
Use a device to measure the return water temperature leaving the boiler. Compare this measured temperature with the display temperature (See page 52.) •
Replace return temperature sensor if temperature comparison is off by more than 10
ºF
.
E 24
Low Voltage Internal Short or Voltage Feedback Short or voltage feedback in the 24V circuit.
Check the following: •
Line voltage to the boiler for polarity and 120VAC. Ensure the boiler is on a dedicated line. If voltage is supplied from “OFF-GRID” source, check conditions.
•
Moisture on and around the low voltage terminal strip on the boiler. Resolve moisture issue.
•
Moisture on the display. Resolve moisture issue and replace the display panel.
•
Voltage feedback to Terminals 7 and 8, Terminals 11 and 12, and Terminals 17 and 18. •
Remove all field wiring from the boiler and reset the boiler control module.
•
Initiate a call for heat external to the boiler and check for voltage on field wiring to termi- nals 7 and 8 (space heating) and terminals 11 and 12 (DHW heating).
•
Reset the boiler control module and retry ignition sequence and boiler operation. If problem continues, contact AERCO International Technical Support for additional assistance.