Desa R35D Service Manual page 18

Hot Surface Ignition Models Service Manual
OBSERVED FAULT
Ignition Control Trips out Within the
First Ten Seconds of Operation
1 Defective Ignition Control
2
Defective or Dirty Photocell
Bad Electrical Connection(s) or
3
Wired Incorrectly
TEST PROCEDURE
1 Defective Ignition control
Remove pressure gauge plug from filter end cover. Re-
move 4 side cover screws that attach the side cover to
the heater. Allow side cover (with ignition control attached)
to rest on fuel tank flange. Disconnect only the photocell
wires from ignition control. Attach the HA1170 leads to
the photocell terminals on the ignition control. Plug the
power cord into a grounded 120V/60 Hz outlet. When
the motor starts turn the HA1170 toggle switch to the
"flashing" red LED position (see page 10 for HA1170
calibration procedures). If the motor shuts off after 3 or 4
seconds, the control is defective and should be replaced.
If the motor continues to run in step 1, the photocell may
be dirty or defective.
For replacement parts contact:
Ignitor Heats Up, Motor Starts and Runs, and Fuel Ignites,
But Heater Shuts Off After a Short Period of Time
Safety Control Trips out After
Ten Seconds of Operation
4 Photocell Boot Not Properly Seated
in Bracket
5 Check for proper Pump Pressure
6 Dirty/Clogged Filters in Compressor
7 Check for Restricted Fuel Flow
Due to:
A. Seal Leak
B. Filter Blocked
C. Restriction in Nozzle or
Nozzle Adapter
8 Fuel Cap and Gasket Not Vented
Flashing
Red LED
Photocell
Ends
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18
Toggle Switch
Test Leads