L.B. White 100 Tradesman Portable Forced Air - Manual (Page 17)

R E A D T H I S E N T I R E S E C T I O N B E F O R E
BEGINNING TO TROUBLESHOOT PROBLEMS.
The following troubleshooting guide provides systematic
procedures for isolating equipment problems. This guide is
intended for use by a QUALIFIED GAS HEATER SERVICE
PERSON. DO NOT ATTEMPT TO SERVICE THESE HEATERS
UNLESS YOU HAVE BEEN PROPERLY TRAINED.
TEST EQUIPMENT REQUIRED
The following pieces of test equipment will be required to
troubleshoot this system with minimal time and effort.
• Digital Multimeter - for measuring AC and DC voltage
and resistance.
• Low Pressure Gauge - for checking inlet and manifold
pressures at the gas control valve against dataplate
rating.
■ Visually inspect equipment for apparent damage.
■ Check all wiring for loose connections and worn
insulation.
Use the flow charts on the following pages to troubleshoot
problems. To use the charts effectively, you must first
identify the problem. The problems are numbered along
with a brief explanation of each problem. Start at the
diamond closest to the identified problem and proceed with
each step, performing the suggested tests. After each step
or test, the guide will direct the service person to the next
logical step based on the outcome of the previous check.
Components should be replaced only after each step has
been completed and replacement is suggested in the flow
chart.
The problems are listed below along with the page number
on which you may find the flow chart for the specific
problem.
Problem Description Page
1. Fan Motor Does Not Run . . . . . . . . . . . . . . . . . . . . . . . .17
2. Fan Motor Runs, Heater Does Not Light . . . . . . . . . . . .17
3. Burner Flame Drops Out After 10-15 Minutes
Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4. Heater Lights But Does Not Stay Lit . . . . . . . . . . . . . . .18
5. Backflash Switch is Open . . . . . . . . . . . . . . . . . . . . . . .18
Troubleshooting Guide
WARNING
Electrical Shock and Burn Hazard
■ Troubleshooting this system may require operating the
unit with line voltage present and gas on. Use extreme
caution when working on the heater.
■ Failure to follow this warning may result in property
damage, personal injury or death.
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