TM 5-4520-241-14
SECTION III. TROUBLESHOOTING
3-4.
GENERAL.
a. This section contains troubleshooting information for locating and correcting most of the operating problems which
may develop in the space heater. Each malfunction is followed by a list of tests or inspections which will help you to
determine probable causes and corrective actions to take. You should perform the tests/inspections and corrective
actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective action. If a
malfunction is not listed, or is not corrected by listed corrective actions, notify your supervisor.
3-5.
OPERATOR/CREW TROUBLESHOOTING CHART.
Refer to table 3-2 for troubleshooting which is allocated to the operator/crew maintenance level.
NOTE
Before you use this table, be sure you have performed all applicable operating
checks.
Table 3-2. Operator/Crew Troubleshooting
MALFUNCTION
TESTING OR INSPECTION
CORRECTIVE ACTION
1.
HEATER FAILS TO START (NO FLAME, NO VENTILATING AIR).
Step 1.
Check that power is applied to heater.
Connect heater to a source of 120 VAC power. Ensure that power is connected to the POWER
receptacle.
Step 2.
Check that HEATER-OFF-FAN switch is in either FAN or HEATER position.
Step 3.
Check room thermostat setting.
Thermostat setting must be higher than ambient temperature of enclosure to start heater
operation.
3-3