Desa H.S.I. Series Trouble- Shooting, Observed Fault, Possible Cause, Remedy, See Pump Pressure

Continued

TROUBLE- SHOOTING

Item	How Often	How To
Spark plug	Clean and regap every 600	See Spark Plug, pages 12 and 13.
	hours operation or replace
	as needed.
Fan blades	Clean every season or as needed. See Fan, page 19.
Motor	Not required/permanently lubricated

WARNING

Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

OBSERVED FAULT

Heater ignites, but flame-out control shuts off heater after a short period of time (EDI models only).

POSSIBLE CAUSE

Wrong pump pressure

Dirty air output, air intake, and lint filters

Dirty fuel filter

Dirt in nozzle

Dirty photocell lens

Bad flame-out control

REMEDY

See Pump Pressure Adjustment, page 14.

See Air Output, Air Intake and Lint Filters, page 14.

See Fuel Filter, pages 10 and 11.

See Nozzle, pages 15 thru 17.

Clean photocell lens.

Replace flame-out control.

Heater will not ignite, but motor runs for a short period of

Wrong pump pressure	See Pump Pressure
	Adjustment, page 14.

time.

Carbon deposits on spark plug and/or improper gap

Dirty fuel filter

Dirt in nozzle

Water in fuel tank

See Spark Plug, pages 12 and 13.

See Fuel Filter, pages 10 and 11.

See Nozzle, pages 15 thru 17.

Drain and flush fuel tank with clean kerosene. See Storage, page 8.

WARNING: High voltage!

Electronic ignitor not	Make sure electronic
grounded (earthed)
Bad electronic ignitor	ignitor mounting is tight.
	Replace electronic
	ignitor.

Motor does not start	Flame-out control not reset	Reset flame-out control
when heater is	(EDI models only)	button, see Figures 6 thru
plugged in, fan		8, pages 7 and 8.
rotates slowly or	Binding pump rotor	If fan is hard to turn, see
does not turn.
		Pump Rotor, page 18.
			9

099605