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Troubleshooting Guide
READ THIS ENTIRE SECTION
BEFORE BEGINNING TO
TROUBLESHOOT PROBLEMS.
WARNING
■ This heater can start at any time.
■ Troubleshooting this system may require
operating the unit with line voltage present
and fuel .
■ Use extreme caution when working on the
heater.
■ Failure to follow this warning may result in
property damage, personal injury or death.
The following troubleshooting guide provides
procedures for isolating equipment problems.
This guide is intended for use by a QUALIFIED
HEATER SERVICE PERSON. DO NOT
ATTEMPT TO SERVICE THESE HEATERS
UNLESS YOU HAVE BEEN PROPERLY
TRAINED. TEST EQUIPMENT REQUIRED:
• Digital Multimeter - for measuring AC voltage
and resistance
• High Pressure Gauge - for checking pump
pressure against dataplate rating.
Before Starting:
• Visually inspect equipment for apparent damage.
• Check all wiring for loose connections and
worn insulation.
Components should be replaced only after each
step has been completed and replacement is
suggested. Refer to the Servicing sections as
necessary to obtain information on disassembly
and replacement procedures of the component
once the problem is identified. Refer to the system
operation sequence in this section to gain an
understanding as to how the equipment operates
during a call for heat.
Understanding the sequence of operation of
the ignition module and related components is
essential as it will relate directly to troubleshooting
the heater.
Journeyman Ductable Oil Indirect-Fired Heater
SEQUENCE OF OPERATION:
• Line voltage connected to heater power receptacle.
• Line voltage is sent to:
- POWER green light
- Fan switch
- Main motor relay
- Thermostat selector switch
• Selector is set to either MANUAL or
THERMOSTAT position.
- Selector switch sends voltage through both auto high
• Burner control performs an internal components test.
• Burner motor will starts and perform a 45 seconds
pre-purge.
- Igniter start sparking.
• After the 45 seconds pre-purge, the oil valve solenoid
will be energized.
• Ignition occurs.
• The burner will heat up the heat exchanger.
- Main motor will not start right away.
• Once the heat exchanger has reach a centain
temperature, the fan switch will energized the main
motor relay.
• Main motor will start.
• When the selector switch is set to the OFF position or
thermostat opens due to heat demand is satisfied
- The burner control de-energized the oil solenoid.
- The burner motor will continue to operate for a short
• The main motor will continue to operate to cool down the
heat exchanger (post purge).
• The fan switch will de-energize the main motor relay
once the heat exchanger has cool down.
- Main motor stops.
• Process will start again on a call for heat by the
thermostat or the selector switch is set to the MANUAL
position.
Owner's Manual • Journeyman
limit switches to the burner controller.
time to burn off any leftover fuel.
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