TM 9-4520-272-14&P
0016 00
Table 1. Troubleshooting Procedure for Large Capacity Field Heater (LCFH).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
18. Heater starts, shuts down,
Step 1. This error code indicates that
Step 1. Turn power switch to OFF.
and displays error code: H130
the batterie voltage is outside the
Open engine bay access door and
operating range of a minumum 19.5
inspect the wires going to the
Volts and a maximum of 32 Volts.
alternator and ensure that they are
all connected properly and that they
are not cut or damaged in any way.
Ensure the the excitation wire (low)
is connected properly and not
damaged. Ensure that the alternator
output wire (low) is not broken or
damaged. Repair any broken or
damaged wires.
Step 2. Ensure that the alternator
belt is not loose. If loose, adjust the
belt IAW WP 0039 00.
Step 3. Ensure that all of the battery
cable connections are secure and
that the cables are not damaged in
any way. Replace any damaged
cables IAW WP 0057 00.
Step 4. Test batteries IAW 0058 00.
Replace one or more defective
batteries.
Step 5. Test output of alternator. If
no output voltage or low output
voltage, replace alternator IAW 0039
00.
Step 1. Check outdoor temperature.
19. Heater starts, shuts down,
Step 1. This error code indicates that
and displays error code: H131
the system is experiencing a battery low
If temperature is 40 degrees F or
lower, use the slave connector to
voltage condition (battery must have
provide supplemental source of
15V minimum). Turn power switch to
24VDC power to heater. If batteries
OFF. Measure battery voltage at slave
are still low or defective, replace
connector and ensure that it is between
batteries IAW WP 0058 00.
15V and 24V.
Step 2. Ensure that the alternator
Step 2. Check alternator belt and
ensure that it is not damaged or loose.
belt is not loose. If alternator belt is
loose, adjust IAW WP 0039 00.
Step 3. Open engine bay access
Step 3. Check alternator output wire
door and inspect the wires going to
and ensure that it is not broken,
the alternator and ensure that they
damaged, or not connected.
are all connected properly and that
they are not cut or damaged in any
way.
Step 4. Ensure that all of the battery
Step 4. Check all battery connections
cable connections are secure and
and ensure that all are secure and
that the cables are not damaged in
undamaged.
any way.
0016 00-6
