BENSON 205 - Fault Finding Guide; Burner Fails to Run; Burner Goes to Lockout

Doc No. 20-45-159 Page 56 of 60
No Power
Burner fails
to run
No Demand
Check isolator
Check fuse
Check controls
Burner lockout
Check set temp
Check on time
Check on time
Check air
pressure switch
Check ame
probe
Check burner
motor
6 Fault Finding Guide
Check gas
supply
Ensure gas cock
is open
Ensure start gas
valve opens
Fan starts
but burner
goes to
lockout
Purge air
Check control
box and burner
Check as per
burner manual
Check
control box
Check HT lead
and connector
Check gap
Check insulation
Air in gas feed
Faulty air
pressure switch
Faulty ignition
transformer
Faulty electrode
Faulty control
box
Check gas
supply