Heat Wagon HVF180, Руководство по установке и обслуживанию

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Heater ignites, runs less than one minute and shuts down
Causes:
1. Photocell is dirty, misaligned or defective.
2. Control board is defective.
3. Fuel pump defective.
4. Fuel filter dirty.
Solutions:
1. Photocell is dirty, misaligned or defective. Check that the photocell is aimed correctly and is free of dirt. If necessary, clean the photocell “eye”
with a soft, dry cloth. Unfortunately no test exists for the photocell. Attempting to “jumper out” the photocell will not test the function. You must
either replace the photocell or borrow a known functioning photocell from an identical heater.
2. Control board is defective. If the heater’s spray and spark are correct, the photocell and control board must work together to recognize the com-
bustion flame has become established. Therefore if a new photocell does not correct this symptom, the control board is defective.
3. Fuel pump is defective. If the fuel pump will not achieve or maintain proper output pressure, the fuel pump is defective. Check the pump’s output
pressure with a gauge.
4. Fuel filter dirty. Inspect the internal and external fuel filters and clean or replace as needed.
Heater ignites, runs several minutes, then shuts down.
Causes:
1. Fuel pump is defective.
2. Solenoid valve is defective.
3. Overheat thermostat is defective.
4. Ducting is improper.
5. Venting is improper.
6. Nozzle is dirty.
7. Fuel filter is dirty.
8. Control board is defective.
9. Fuel contains water or contaminants.
Solutions:
1. Fuel pump is defective. If the fuel pump will not achieve or maintain proper output pressure, the pump is defective. Check the fuel pump output
pressure with a gauge.
2. Solenoid valve is defective. Use a multi-meter set to measure voltage. Check for proper voltage at the solenoid valve. If proper voltage is read
and the solenoid valve will not stay open and allow fuel spray, the solenoid valve is defective.
3. Overheat thermostat is defective. Also called a safety thermostat or limit switch. Some heaters are equipped with this. Set a multi-meter to mea-
sure ohms of resistance. Perform this test immediately after the heater shuts down and the overheat thermostat is still hot. Place the multi-meter
probes on the two male terminals of the safety thermostat. If the multi-meter reads infinity (no continuity) the safety thermostat is defective.
Remember that if the heater is over firing due to high pump pressure, worn nozzle, or is improperly ducted or vented, the safety thermostat will
heat enough to shut the heater off.
4. Ducting is improper. Always follow the manufacturer’s recommendations
regarding maximum duct length and diameter. Failure to do so can result in heat building up in the heater until the safety thermostat contacts open
and shut the heater off.
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