SECTION 14: TROUBLESHOOTING
14.3 Troubleshooting for Flame Supervision System
To measure flame current, connect a 0 - 50 μA DC meter in series with the flame probe. If the meter reads negative values, then reverse the test leads.
START
Connect a DC ammeter in series with the flame probe.
Is the flame present and
at least 1 μA DC flame No current?
Yes
Is there a current flowing in
the flame probe circuit with Yes no flame present?
No |
| |
Does “lockout” occur when | Yes | |
there is a flame present? | ||
|
No
Heater Operating | No | |
TROUBLESHOOT ENDS. | ||
|
Use General
Troubleshooting section to
trace the fault.
Is the connecting lead
damaged? Is the flame probe damaged or touching earthed components?
Is inlet burner gas pressure correct? Is live and neutral polarity correct? Is
flame probe circuit correct?
No
Repair or replace as
required.
If problems persist, contact
Repair or replace as
Yes required.
Yes Replace ignition control.
NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current
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