TM 10-7310-281-13&P
MODERN BURNER UNIT (MBU)
0005 00
OPERATION UNDER USUAL CONDITIONS
0005 00-21
Normal Shut-Down. When the burner is no longer required, it should be shut-down. To do so, simply
push the STOP button. This will interrupt the ignition cycle and the burner will shut down immediately.
Automatic System Shut-down: The MBU is programmed to shut down automatically when the
following conditions exist (appropriate indicator lights will be illuminated). Refer to Table 1 for a detailed
description of fault indicators.
Voltage. This indicator lights when the power requirements of the MBU are not being met. The power
being supplied to the MBU is either below 22V DC or greater than 29.5V DC. The indicator will light red
and the system will shut-down. The power source should immediately be checked in the sequence
listed below.
If commercial or generator supplied power is used:
Verify that power source is supplying 110V AC.
Verify that power converter main power switch is ON.
(With power converter switch temporarily in the OFF position) check 24V DC power cable connections
between the power converter, 24V DC extension, branch cables, and MBU.
If problem cannot be resolved refer to troubleshooting instructions in WP 0009.
If vehicle or battery power is used:
Verify that vehicle is supplying between 22 and 29.5V DC as measured with a multimeter.
Verify that battery pack 3-Position Function Switch is in the RUN position.
Verify that the battery pack is operating correctly by checking the Charging Status indicators on the front
control panel.
With battery pack 3-Position Function Switch temporarily in the OFF position, check all 24V DC power
cable connections between the battery pack, branch cable, and MBU.
If problem cannot be resolved refer to troubleshooting instructions in WP 0009.
Service. A fault has occurred in the burner circuitry or mechanical systems that prevents normal
operation. The immediate and proper operator response is to perform troubleshooting procedures in
accordance with WP 0009.
Low Fuel. This indicator will light green, amber, and red as indicated in Table 1. The burner will shut-
down when it has run out of fuel. The MBU must be re-fueled before proceeding.
