T.O. 35C2-3-442-2
P-9-TM-457-35
TM 5-6115-457-34
TM-07464A-35
Table 2-3. Troubleshooting (Continued)
CORRECTIVE ACTION
PROBABLE CAUSE
MALFUNCTION
ELECTRIC WINTERIZATION KIT
a. Test electric heater and
a. Defective electric
70. Switch on control box
replace if defective
heater.
positioned to ON;
heater ON indicator
energized, coolant
pump operating but
coolant temperature
not rising.
a. Check continuity of switch
a. Defective thermo switch
71. Switch on control box
S2.
at room temperature. It
positioned to ON;
should have continuity.
indicator energized
Immerse its temperature
but coolant not being
sensing element in a water
circulated and cool-
bath at a temperature of
ant temperature not
120 + F. There should be
rising.
no continuity now. Allow
water to cool below 100F.
There should be continuity
again.
b. Defective control box.
b. Test control box
c. Defective heater.
c. Repair heater
d. Defective coolant pump.
d. Test pump
72. Switch on control box
a. No power to input re-
a. Remove cable and measure
positioned to ON and
ceptacle J49, terminals
voltage to these two ter-
indicator does not
A and B, figure 1-30.
minals. It should be be-
energize.
tween 205 to 240 VAC,
50/60 or 400 hertz.
b. Defective control box.
b. Test control box
2-55
