L.B. White Guardian with Smart Sense - Hot Surface (60K / 100K) - Manual (Page 19)

19
READ THIS ENTIRE SECTION BEFORE
BEGINNING TO TROUBLESHOOT PROBLEMS.
The troubleshooting flow 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.
• Low Pressure Gauge - (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.
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 operation
sequence of the ignition module and related components is
essential as it will relate directly to problem solving provided
by the flow charts.
The ignition control module is self-diagnostic. The red light
on the module will flash a specific pattern depending upon
the problem which is diagnosed. To effectively use the flow
charts, you must first identify what the problem is by the
flashing pattern of the L.E.D. (light emitting diode)
diagnostic light. If the light is flashing, the flash pattern will
be followed by a pause and then a repeat of the flash
pattern until the problem is corrected. Refer to the tables
below to identify what page to refer to when troubleshooting
any problems.
Problems Page
Heater not cycling above minimum heat output . . . . . .21
L.E.D. Diagnostic light not on during a call for heat . . .21
L.E.D. diagnostic light flashing:
A. Rapid Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
B. Long Flash (2 seconds on - 2 seconds off) . . . . .22
C. One Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
D. Two Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
E. Three Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
F. Four Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
G. Five Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
H. Six Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Components should be replaced only after each step has
been completed.
Troubleshooting Instructions
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.