Troubleshooting - PHP Heat Wagon LVF90A Service Manual

Symptoms:
Motor and transformer do not operate. Page 146.
Motor does not start, but spark is present. Page 147.
Motor runs, spark is present, but there is no fuel spray. Page 148.
Motor runs, fuel sprays, but no spark is observed. Page 150.
Motor runs, fuel sprays, spark is present, but heater will not ignite. Page 150
Heater ignites, runs less than one minute and then shuts down. Page 151.
Heater ignites, runs several minutes then shuts down. Page 152.
Heater ignites, but combustion is poor or uneven. Page 153.
Heater ignites, but flame is excessive. Page 155.
Motor and transformer do not operate.
Causes:
1. Incorrect or low voltage supplied to the heater.
2. Fuse in heater is blown.
3. Thermostat defective, or not turned up to call for heat.
4. Thermostat jumper cap not in place.
5. Control board is defective.
6. Reset button has not been reset.
Solutions:
1. Incorrect or low voltage supplied to the heater. Most indirect oil heaters
require a minimum of 108 volts to operate properly. A multi-meter set to
measure volts can be used to check the amount of voltage at the end of the
extension cord(s). If the measured voltage is too low, the length of the exten-
sion cord (s) must be shortened or a thicker gauge extension cord must be
used. Refer to page 160 for guidelines on extension cord use.
2. Fuse in heater is blown. Locate and remove the in-line fuse of the heater. Set
a multi-meter to measure ohms of resistance. Place a multi-meter probe on
each end of the fuse. The multi-meter should read zero ohms (continuity) or
the fuse is blown. If a new fuse blows immediately, check for possible causes.
Check for incorrect voltage to the heater. Make sure the total amperage draw of
all equipment running on the circuit is not too great. If the supplied voltage
and total amperage draw are correct, check the wiring in the heater for correct-
ness and possible shorts.
146
Indirect Oil Troubleshooting