TM 9-2350-261-10
CAUTION
Overheating will damage batter-
ies. Do not use coolant heater if
temperature is above -25°F
(-31°C).
Carrier batteries can discharge.
Do not operate earner lights,
radios, or
other
electrical
equipment while coolant heater
is running.
4. Press PRESS-TO-TEST switch.
Check that indicator light comes
on.
5. Move RUN-OFF-START switch
to START. Hold switch in
START until indicator light
comes on.
6. Move RUN-OFF-START switch
to RUN as soon as indicator
light comes on. Do not stop in
OFF position.
7. If coolant heater does not start,
repeat steps 4 and 5 above. If
coolant heater does not start
after three tries, troubleshoot
heater (page 3-15).
NOTE
Coolant heater always starts at
low heat. It switches to high heat
if HI-LO switch is set at HI.
8. Move HI-LO switch to HI or
LO.
NOTE
When HI-LO switch is at HI,
heater will automatically go to
low heat if coolant temperature
reaches 190°F (88°C). It will go
back to high heat if coolant
temperature
drops to 120°F
(49°C). If coolant reaches a
temperature of 245° to 260°F
(118° to 126°C), heater will stop
and must be restarted.
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