Roberts Gorden DAT100 - Manual (Page 38)

D UAL A IR ® H EATING AND COOLING U NITS I NSTALLATION O PERATION AND S ERVICE M ANUAL
32
15.3 Troubleshooting for Flame Supervision System
Repair or replace as
necessary.
If problems persist, contact
ROBERTS GORDON ® at
Tel: +44 (0) 1902 498733
www.combat.co.uk
or www.rg-inc.com
Control box faulty.
Replace with correct type.
Use section 15.1 to
trace the fault.
Heater Operating
TROUBLESHOOT ENDS.
No
Repair or replace as
necessary.
Is inlet burner gas pressure
correct? Is live and neutral
polarity correct? Is
flame probe circuit correct?
Is there a current flowing in
the flame probe circuit with no
flame present?
Yes
No
Does “lockout” occur when
there is a flame present?
Yes
Is the connecting lead
damaged? Is the flame probe
damaged or touching earthed
components?
No
Is the green light on and
at least 1 µA DC fame
current?
Connect a DC ammeter in
series with the flame probe.
Yes
No
Yes
Yes
No
START
NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC.