Desa B50H - Manual (Page 7)

7
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TROUBLE-
SHOOTING
WARNING
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
FAULT CONDITION POSSIBLE CAUSE REMEDY
Check circuit breaker in
electrical panel.
Check all electrical connec-
tions. See Wiring Diagram,
page 11.
If fan does not turn freely, see
Pump Rotor, page 10.
Replace ignition control
assembly.
Replace motor.
No power to heater
Bad electrical connection
between motor and ignition
control assembly or ignition
assembly and power cord
Binding pump rotor
Defective ignition control
assembly
Defective motor
Motor does not start
five seconds after
heater is plugged in.
Motor starts and runs
but heater does not
ignite. No fuel in tank
Pump pressure incorrect
Dirty fuel filter
Obstruction in nozzle
Water in fuel tank
Bad electrical connection
between ignitor and ignition
control assembly
Defective ignitor
Defective ignition control
assembly
Fill tank with kerosene.
See Pump Pressure Adjust-
ment, pages 9.
See Fuel Filter, page 9.
See Nozzle, page 10.
Drain and flush fuel tank with
clean kerosene. See Storing,
Transporting, or Shipping,
page 6.
Check electrical connections.
See Wiring Diagram, page 11.
Replace ignitor.
Replace ignition control
assembly.
WARNING: High voltage!
Pump pressure incorrect
Dirty air intake, air output,
and/or lint filter
Dirty fuel filter
Obstruction in nozzle
Photocell assembly not
properly installed (not
seeing the flame)
Dirty photocell lens
Bad electrical connection
between photocell and
ignition control assembly
Defective photocell
Defective ignition control
assembly
See Pump Pressure Adjust-
ment, page 9.
See Air Output, Air Intake,
and Lint Filters, page 8.
See Fuel Filter, page 9.
See Nozzle, page 10.
Make sure photocell boot is
properly seated in bracket.
Clean photocell lens.
Check electrical connections.
See Wiring Diagram, page 11.
Replace photocell.
Replace ignition control
assembly.
Heater ignites but
ignition control assembly
shuts heater off after a
short period of time.