TM-9-2540-207-14-P

HEATER, VEHICULAR COMPARTMENT, MODEL: A20

TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2007

TM-9-2540-207-14-P - Page 187 of 288

TM 9-2540-207-14&P

6-23

6.5.30 E5 - INLET OVER PRESSURE (Design Iteration 3 Only)

AIR IS BEING FORCED THROUGH THE HEATER BY THE NBC SYSTEM AT STARTUP, OR

BURNER FAN OPERATING LIMITS ARE OUT OF RANGE

AIR PRESSURE IS GREATER ON THE INLET SIDE OF THE BURNER FAN THAN ON THE

EXHAUST SIDE

CHECK/POSSIBLE CAUSE

REF

.R

EPAIR

1

ENSURE ALL DUCTING TO HEATER

IS PROPERLY CONNECTED

2.3

2.7

RECONNECT DUCTING

RESTART HEATER

2

CHECK THAT NBC SYSTEM IS OFF

REF. APPROPRIATE VEHICLE TM

VEHICLE TM

TURN NBC SYSTEM OFF IF POSSIBLE

RESTART HEATER

RESTART NBC SYSTEM 5 MINUTES AFTER

HEATER ENTERS RUN MODE (07 OR 14)

NOTE:THIS IS A WARNING, THE AIR PRESSURE DIFFERENCE IS GREATER THAN 6 IWC; THE HEATER

WILL ATTEMPT TO OPERATE, BUT HAS THE POTENTIAL TO FLAME OUT.

6.5.31 E6 - HIGH VOLTAGE (Design Iteration 1 & 2 Only)

VOLTAGE SUPPLIED TO THE HEATER IS ABOVE NORMAL VOLTAGE LIMITS (19VDC - 30VDC

NORMAL RANGE)

CHECK/POSSIBLE CAUSE

REF

.R

EPAIR

1

CHECK THE SOURCE VOLTAGE OR

BATTERY LEVELS.

VEHICLE TM

IF VOLTAGE IS GREATER THAN 30VDC THEN

CHECK VEHICLE ALTERNATOR - SEE

APPROPRIATE VEHICLE TM

TURN HEATER OFF UNTIL VOLTAGE SYSTEM

REPAIRED

2

DEFECTIVE ELECTRONIC

PROGRAMMED CONTROLLER

BOARD

5.2.5

REPLACE ELECTRONIC PROGRAMMED

CONTROLLER

RESTART HEATER