Desa CP600AK Service Procedures, Upper Shell Removal, Transporting, or Shipping, page, Continued

8

TROUBLESHOOTING SERVICE PROCEDURES

TROUBLESHOOTING

Continued

OBSERVED PROBLEM	POSSIBLE CAUSE		REMEDY
Heater ignites, but flame-out control shuts	1.	Wrong pump pressure	1.	Adjust pump pressure (see Pump Pres-
off heater after a short period of time				sure Adjustment sections, pages 9 and 10)
	2.	Dirty fuel filters	2. Clean fuel filters (see Fuel Filters, page 11)
	3.	Dirt in nozzle	3.	Replace nozzle (see Nozzle, page 9)
	4.	Dirty photocell lens	4. Clean photocell lens with clean cotton swab
	5.	Open or damaged photocell	5.	Replace photocell
	6.	Bad flame-out control	6.	Replace flame-out control
	7.	Damaged fan switch	7.	Replace fan switch
Heater burns, but puffs of smoke can be seen	1.	Wrong pump pressure	1.	Adjust pump pressure (see Pump Pres-
Heater does not burn steady				sure Adjustment sections, pages 9 and 10)
Heater burns with odor	2.	A) Heater almost out of fuel	2.	A) Add fuel to tank
Heater smokes continuously		B) Water condensation in fuel tank		B) Check fuel tank for bubbles of water
		C) Wrong fuel		in bottom. If found, remove fuel (see
				Storing, Transporting, or Shipping, page
				5). Clean tank and fuel filters (see Fuel
				Filters, page 11). Fill with clean fuel
				C) Remove wrong fuel (see Storing,
				Transporting, or Shipping, page 5).
				Clean tank and fuel filters (see Fuel Fil-
				ters, page 11. Fill with correct fuel
	3.	Dirty fuel filters	3. Clean fuel filters (see Fuel Filters, page 11)
	4.	Air leak in suction system	4.	Tighten all fuel line connections (see
				Fuel Lines, page 10)
	5.	Dirty nozzle	5.	Replace nozzle (see Nozzle, page 9)
	6.	Low voltage causing motor to operate	6.	Check voltage at heater. Voltage at heater
		below rated speed		should be not less than 90% of rated volt-
				age (108V minimum for 120V heaters)
	7.	Loose fuel line	7.	Check and tighten all fuel line connec-
				tions (see Fuel Lines, page 10)

SERVICE PROCEDURES

WARNING: Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur. Only a qualifi ed service person should service and repair heater.

UPPER SHELL REMOVAL

1.Remove screws along each side and top of heater using 5/16" nut-driver. These screws attach upper and lower shells together (see Figure 6).

2.Lift upper shell off.

Upper Shell

Figure 6 - Upper Shell Removal, 600,000 Btu/Hr Model

105850-01D