40
ALARM CODE:
Flame Failure
This alarm code is not applicable to all unit types.
PROBLEM:
The controller has received a signal from the flame relay indicating
a flame failure.
SOLUTION
:
Investigate flame relay
1.
Is there a prior alarm such as Unit On/Fan Off, Airflow Sw., or Safety
Circuit?
a.
Yes. See the Diagnostic section for the previous alarm.
b.
No. Continue.
2.
See flame relay troubleshooting information in unit
Installation,
Operation, and Maintenance Manual
.
Diagnostics – Non-Critical Alarm Codes
This section should assist the user in troubleshooting non-critical alarm code messages
that have been displayed on the
BACview
. Most of these alarms are automatically reset
once the alarm is corrected or condition changes. Exceptions to this rule are noted in the
alarm problem descriptions that follow.
ALARM CODE:
Unit off/Fan on
PROBLEM:
The controller has not activated the unit enable output to start the
fan, but the fan status input, is receiving a signal that the fan is running. This alarm will
automatically clear about 15 seconds after the alarm is corrected.
SOLUTION
:
If fan is running
2.
Is controller unit enable output LED for lit?
a.
Yes. There is a problem with the controller program. Call factory.
b.
No. Continue.
3.
Is controller output contact for the unit enable output closed?
a.
Yes. Turn off the power to the controller and recheck. If contact is still
closed the controller output is shorted. Replace the controller.
b.
No. Continue.
4.
Is the unit enable relay energized?
a.
Yes. There is a short or jumper in the wiring. Determine cause and
rectify.
b.
No. Continue.
5.
Is motor starter energized?
a.
Yes. There is a short or jumper in the wiring. Determine cause and
rectify.
b.
No. Continue.
6.
Is the fan status relay energized?
a.
Yes. There is a short or jumper in the wiring. Determine cause and
rectify.
b.
No. Continue.
7.
Is the fan status relay’s normally open contact, closed?
a.
Yes. Replace relay.
b.
No. Continue.
8.
Is there continuity between at the controller between the fan status terminals?
a.
Yes. There is a short in the wiring between these terminals. Determine
cause and rectify.
b.
No. Replace controller.
