TM 3-4230-218-30&P
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
e.
Using multimeter on AC volts refer to system electrical schema-
tic and verify voltage between the yellow wire at terminal 6 and
the green wire at terminal 12.
If voltage is 6 volts or greater,
coil is good, shut engine down, proceed to step 3.
f.
If no voltage is present, coil is defective (refer to page 2-29).
Step 3.
Check for defective START BURNER switch.
Test START BURNER switch (refer to page 2-62).
If control panel START BURNER switch is not defective, proceed to
step 4.
Step 4.
Check for defective control panel THERMOSTAT SELECTOR
switch.
Test THERMOSTAT SELECTOR switch (refer to page 2-62).
If control panel THERMOSTAT SELECTOR switch is not defective
proceed to step 5.
Step 5.
a.
b.
c.
d.
Check for defective magnetic valve.
Refer to MALFUNCTION 2, Step 1a thru 1d.
Turn THERMOSTAT SELECTOR switch to either thermostat
postion and press BURNER START button.
If fuel flows into container, magnectic valve is operative.
If fuel does not flow into container, magnetic valve is defective.
Refer to page 2-52.
5.
ENGINE KNOCKS OR BACKFIRES.
Step 1.
Check for malfunctioning ignition system.
Check for adequacy of spark by attaching spark plug lead to spark
plug and laying plug on cylinder head. Pull recoil starter and
observe spark of electrodes.
If no spark or weak spark is ob-
served, repair engine ignition system (refer to page 2-28).
If spark is seen, proceed to step 2.
2-5
