Troubleshooting Guide - L.B.White I-40 Manual De Usuario

26
I-40 Manual and Spark Ignition
Manual Ignition Heaters

Troubleshooting Guide

READ THIS ENTIRE SECTION BEFORE
BEGINNING TO TROUBLESHOOT
PROBLEMS.
The following troubleshooting fl ow charts provide
systematic procedures for isolating heater
problems. The charts are intended for use by a
QUALIFIED GAS HEATER SERVICE PERSON.
DO NOT SERVICE THE HEATER 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 DC voltage
when using thermocouple diagnostic kit.
• Thermocouple Diagnostic Kit - (L. B. White Part
No. 21188) When used with a standard digital mul-
timeter, this kit allows testing of the thermocouple
and electromagnetic power unit.
• Pressure Gauge - (L. B. White Part No. 20736)
For checking inlet pressures to the heaters.
INITIAL PREPARATION
-- Inspect heater for damage.
-- Thoroughly clean the heater.
WARNING
Burn Hazard
■ Troubleshooting this system may require
operating the heater with the burner on. Use
extreme caution when working on the heater.
■ Failure to follow this warning will result in burns
causing severe injury.
Owner's Manual • I-40
Heater Problems
1. Heater does not light ........................ 27
2. Flames extending beyond
outer cone or lazy fl ame ................... 27
3. Heater lights but does not stay lit ..... 28
4. Outer combustion cone does
not heat up on high thermostatic
head setting ...................................... 29
5. Heater backfl ashes gas through
air housing inlet ................................ 30
6. Heater does not cycle back
to low heat ........................................ 30
Components should be replaced only after each
step has been completed and replacement is
suggested in the fl ow chart. Refer to the servicing
sections as necessary to obtain information on
disassembly and replacement procedures of the
component once the problem is identifi ed by the
fl ow chart.
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