17
TROUBLE SHOOTING (CONT’D)
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
2. Pilot will not stay lit
A. Defective pilot
1. Check pilot, flame must
after carefully following
generator
impinge on pilot generator.
lighting instructions.
Clean and or adjust pilot for
maximum flame impingement
on generator.
2. Be sure wire connections
from generator at gas valve
terminals are tight and
generator is fully inserted into
pilot bracket.
3. Check thermogenerator
with millivolt meter. Take
reading at “TH-TP” and “TP”
terminals of gas valve.
Should read 325 millivolts
minimum while holding valve
knob depressed in pilot
position, pilot lit, and ON/OFF
switch “OFF”. Replace faulty
generator if reading is below
specified minimum.
B. Defective valve
1. Connect the millivolt
meter probes to the “TH-TP”
and “TP” terminals on the gas
valve. Turn knob to
pilot position, depress and
light pilot light. If meter
reading is greater than 325
m.v. after 30 seconds, the
pilot generator is good. If
pilot does not stay lit, the
valve is defective. If the
meter reading is less than
325 m.v., the thermo-
generator is defective.
C. Open wire connection
1. Check wire continuity and
in pilot circuit
connections in pilot circuit.
