Lochinvar Crest w/RealTime O2 Trim 100 Series User Manual

3 Troubleshooting (continued)
Service Manual
51
Table 3G (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT DESCRIPTION CORRECTIVE ACTION
Outlet Temp
High
Outlet water temperature has exceeded the
maximum outlet water temperature.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the boiler is piped properly into the heating
system. Refer to Section 5 - Hydronic Piping of the
Crest Installation and Operation Manual
for the proper piping methods for the Crest boiler.
• Check for 120 vac to the boiler pump motor on a call
for heat. If voltage is not present, check wiring back
to the main control board. Replace the main control
board if necessary.
• If 120 vac is present on a call for heat and the boiler
pump is not operating, replace the pump.
• Verify that the boiler pump is set to the proper speed
or that the boiler pump is the proper size. Reference
Section 5 - Hydronic Piping of the Crest Boiler
Installation and Operation Manual for boiler pump
specifications.
• Inspect the outlet sensors and associated wiring.
Measure the resistance of the sensors and compare to
the tables in of this manual.
Parameter
Programming
Complete
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART TOUCH display
to reset.)
After downloading parameters from a laptop,
the main control board must be reset.
• Press the RESET button on the SMART
TOUCH display panel.
Sensor Open
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
display to reset.)
Either the inlet water or outlet water
temperature sensor has been disconnected.
• Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to the tables in this manual.
• Replace the sensor if necessary.
Sensor Shorted
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
display to reset.)
Either the inlet water or outlet water
temperature sensor has been shorted.
• Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to the tables in this manual.
• Replace the sensor if necessary.
Flue Sensor
Open
(will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
display to reset.)
The flue sensor has been disconnected or
removed from the flue.
• Check the sensor and its associated wiring. Repair
or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to the tables in this manual.
• Replace the sensor in flue.
• Replace the sensor if necessary.

Lochinvar Crest w/RealTime O2 Trim 100 Series Specifications

General

Brand	Lochinvar
Model	Crest w/RealTime O2 Trim 100 Series
Category	Boiler
Language	English