Classic Agricultural Animal Confinement Building Heaters
www.lbwhite.com
Owner’s Manual • Classic
26
Troubleshooting Guide
READ THIS ENTIRE SECTION
BEFORE BEGINNING TO
TROUBLESHOOT PROBLEMS.
The troubleshooting
fl
ow charts on the following
pages provide systematic procedures for isolating
equipment problems. The charts are intended for
use by a QUALIFIED GAS HEATER SERVICE
PERSON.
DO NOT 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.
•
Thermocouple Diagnostic Kit
- (Part
No. 550-08506) When used with a standard
digital multimeter, this kit allows testing of the
thermocouple and electromagnetic power unit
strength of the pilot safety gas control valves.
•
Low Pressure Gauge
- (Part No. 500-
00764) for checking inlet and outlet pressures
of the gas control valve against dataplate rating.
INITIAL PREPARATION
■
Visually inspect equipment for apparent
damage.
■
Check all wiring for loose connections and
worn insulation.
To effectively use the
fl
ow charts, you must
fi
rst identify
the problem . The problems are numbered sequentially,
along with a brief explanation of each problem. Start
at the “diamond” closest to the identi
fi
ed problem and
proceed with each step, performing whatever tests are
suggested. 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.
Problem
Page
1
Pilot will not light...........................................27
2
Pilot will not stay lit when pilot control
button is released .........................................28
3
Motor
runs.
Burner does not light with pilot light lit ..........29
4
Motor does not run, heater does not light
with pilot light lit ............................................30
5
Pilot will not stay lit when main burner and
blower are operating ....................................30
6
High limit switch is open ...............................31
7
Burner does not shut off ...............................32
8
Flame lifting off of burner .............................32
9
Burner
fl
ame drops out after 10-15 minutes
of operation ..................................................32
10
Gas control valve chatters ............................33
11 Motor
hums
..................................................33
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.
