D-1000B Heater
Operations & Maintenance
TROUBLESHOOTING
7-2
DHS SYSTEMS LLC
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SYMPTOM / FAULT
CAUSE
CORRECTIVE ACTION
Check connection of H.T.
Ignition Cables to electrodes
d t
f
Check electrodes setting
Check electrodes for cleanliness
Ignition Control Assembly defective
Replace Ignition Control Assembly
Pressure Switch defective
Replace Pressure Switch
Photocell defective
Clean or replace Photocell
Check condition of Electric Motor-
Fuel Pump plastic coupling
Check fuel line system
including fuel filter for possible
leaks
Clean or replace fuel filter
Not enough or no fuel at all at
burner
Clean or replace fuel nozzle
Check electrical connection
Motor starts, no ignition or cuts out
Solenoid defective
Replace solenoid
Make sure air inlet and outlet are
free of debris
Check setting of combustion air flap
Not enough combustion air
Clean burner flange
Too much combustion air
Check setting of combustion air flap
Motor starts, heater emits smoke
Fuel contaminated
Drain and flush fuel tank with clean
fuel