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Service Manual

ManualsBrandsBradford White ManualsCommercialCommander Series ® Atmospheric Vent (UCG) - Ultra Low NOx with ICON HD ® System and BMS Integration (no draft diverter models)
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Troubleshooting
Accessing Diagnostic Mode on the Water Heater Display
(FOR SERVICE PERSONNEL ONLY)
The display has a Diagnostic Mode to access information in aiding servicing of the water heater. This
procedure is for service and installation personnel only. To enter the Diagnostic Mode, follow the steps
illustrated below:
WARNING
The following procedure is for service and installation personnel ONLY. Resetting lockout conditions
without correcting the malfunction can result in a hazardous condition.
Step 1. Press and hold the lower right button under “Next” in the lower right display for at least 3 seconds. You
must be in user mode on the DHW temp screen to access diagnostic mode. If in user mode on the view rate
screen, you cannot access diagnostic mode.
Step 2. In the first screen of diagnostic mode the display will show the flame sense current in microamps when
the burner is operating.
NOTICE
The screens will stay in the Diagnostic Mode for 12.5 minutes after the last button press for viewing
unless “Done” button is pressed to exit Diagnostic Mode.