TM 9-4520-272-14&P
0016 00
Table 1. Troubleshooting Procedure for Large Capacity Field Heater (LCFH).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
39. Heater starts, shuts down,
Step 1. This error code indicates that
Step 1. Repair any loose or
and displays error code: H531
diesel oil pressure has been detected
disconnected wires.
before engine start. Turn power switch
to OFF. Check oil pressure switch SW2
wiring harness and determine if any
wires are loose or disconnected.
Step 2. Determine if the diesel engine is
Step 2. Ensure that diesel engine
still running from previous use.
has shut down from previous use.
Check engine throttle shutdown
cable and make sure it is not
sticking.
Step 3. Test pressure switch to
Step 3. Replace a defective engine
determine if it is defective.
oil pressure switch SW2.
40. Heater starts, shuts down,
Step 1. This error code indicates that an
Step 1. Secure any loose or
and displays error code: H541
open circuit has been detected at the
disconnected K1 relay coil wire.
diesel engine pre-heat relay driver K1.
Turn power switch to OFF. Check K1
relay coil wire (see WP 0062 for
location) and ensure that it is not loose
or disconnected.
Step 2. Test engine pre-heat relay K1
Step 2. Replace a defective K1
and determine if it is defective.
engine pre-heat relay.
41. Heater starts, shuts down,
Step 1. This error code indicates that an
Step 1. Repair a shorted K1 relay
and displays error code: H542
short circuit has been detected at the
coil wire.
diesel engine pre-heat relay driver K1.
Turn power switch to OFF. Check K1
relay coil wire (see WP 0062 00 for
location) and ensure that it is not
shorted.
Step 2. Test engine pre-heat relay K1
Step 2. Replace a defective K1
and determine if it is defective.
engine pre-heat relay.
42. Heater starts, shuts down,
Step 1. This error code indicates that an
Step 1. Turn power switch to OFF.
and displays error code: H551
open circuit has been detected at the
Replace a defective main control
diesel engine starter relay driver. This is
board IAW WP 0063 00.
caused by a defective main control
board.
43. Heater starts, shuts down,
Step 1. This error code indicates that a
Step 1. Turn power switch to OFF.
and displays error code: H552
short circuit has been detected at the
Replace a defective main control
diesel engine starter relay driver. This is
board IAW WP 0063 00.
caused by a defective main control
board.
0016 00-13
