TM 10-4610-232-12
Table 3-1. Operator Troubleshooting Guide (Continued).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
Diesel heater operates normally after started, but shuts down instead of going to standby after container is heated
Heater requires restarting to operate.
Step 1.
Notify unit maintenance.
7.
High pressure pump package heater does not operate.
Step 1.
Check PUMP SKID HEATER circuit breaker. Switch on.
Step 2.
Check thermostat. Adjust thermostat to a temperature higher than ambient temperature.
Step 3.
Notify unit maintenance. 8 Electric or diesel heater keeps on operating after thermostat setting has been
reached.
Step 1..
Notify unit maintenance.
9.
Drain sumps freeze up.
Step 1.
Check 120V circuit breaker. Switch on.
Step 2.
Check SUMP HEAT/PUMP HEAT OFF/ON switch. Turn on.
Step 3.
Notify unit maintenance.
NOTE
The drain sump under the media filter does not have a heat trace.
10.
Diesel heater motor runs, but there is no combustion.
Step 1.
Check fuel pump bowl for fuel. Check fuel pump screen. Fill fuel bowls.
Clean screen, if dirty.
Step 2.
Notify unit maintenance.
11.
Diesel heater has excessive back firing or popping.
Step 1.
Notify unit maintenance.
12.
Diesel heater fan falls to go to high speed during burning cycle.
Step 1.
Notify unit maintenance.
13.
Noxious fumes in ROWPU van (diesel fuel smell) or carbon monoxide (CO) monitor alarms go on.
WARNING
Carbon monoxide can be lethal. Do not sleep in ROWPU van. Do not stay in van if CO monitor audio
alarm is sounding and/or red "ALARM 2" light is on and level of CO on display is above 50 ppm.
Step 1.
Isolate fume source. Close doors if fumes are coming from outside.
Step 2.
Check heater exhaust pipes.
CAUTION
Heater exhaust pipes are very hot(6000F, 316°C). Do not touch exhaust pipes unless heat protective
gloves are worn on hands.
If pipes are plugged, clean out pipes. If pipes are filled with water, drain water from pipes and check that
drain hole in outside exhaust pipe elbow is not clogged and that drain hole is pointing down. (Model
ROWPU1 only).
If extensions have been added to the exhaust pipes, they may be too long. The diesel heaters can only
push exhaust fumes through about 7 feet (2.1 m) of pipe before fumes back up into the van (any elbows in
the pipe are equal to 1 foot (.3 m) of pipe a piece).
3-30 Change 7
