Electrical Load Manager

Question 1

The Load Manager is an electronic system that maintains battery voltage by monitoring battery voltage, and by controlling electrical loads. After the battery voltage drops to a preselected setting (approximately ____ volts), the engine throttle will be increased to compensate for the low voltage and electrical system loads.

Answer 1

12.8

Question 2

An alarm sounds if a low-voltage condition (below ___ volts) develops, and the Officer’s Information Center
displays a message that the Load Manager system is in control.

Answer 2

11.9

Question 3

If the low-voltage condition continues (for approximately ___ minute), then the shedding of electrical loads will begin.

Answer 3

1

Question 4

Load shedding is prioritized. For example, a system such as the heater/air conditioning system may be shut down initially with other systems to follow. If this action does not solve the low-voltage condition, however, more systems
will be shut down.

Answer 4

reference

Question 5

A shed system (load) will not be recognized for ___ minutes or until the unshed voltage setting is maintained for ___ minute.

Answer 5

5

1

Question 6

The fast idle system will be maintained for a minimum of ___ minutes and until a voltage reading of ___ is achieved, even if any system shedding did not occur.

Answer 6

10

13.0

Question 7

The system is interfaced with the parking brake and the transmission so that the system shedding can occur only when the parking brake is set and the transmission is in neutral.

Answer 7

reference

Question 8

Electrical loads will turn on sequentially in priority order from 1 to 8 when their respective switch is activated (either by the ignition or the warning master) and the
vehicle is operated in the mode selected for that output (response and/or scene). Loads will sequence off in reverse order. Priority zero loads will be sequenced on and off but will not shed.

Answer 8

reference

Question 9

In the event of electrical demand exceeding electrical supply, the first electrical load to be shed will be the __________.

This component will be turned off when electrical system voltage drops below ___ Volts.

Answer 9

air conditioning.

12.8

Question 10

It is important to note that at minimum, when ALL electrical accessories are turned on and engine is running at idle (500-750 rpm), the alternator will be unable to keep up with the electrical demands placed on it thereby causing the air conditioning to be turned off. At idle with ALL electrical accessories ON, system voltage can drop well below 12.0 Volts.

Answer 10

reference

Question 11

Even with the engine high idle engaged with all electrical accessories “ON”, system voltage will vary between 12.9 to 13.1 Volts.

Answer 11

reference

Question 12

When the “Emergency Master” electrical switch (located on the overhead switch panel) is toggled to the “ON” position, electrical accessories that are controlled by the master switch and have already been toggled to the “ON” position will turn on in a delayed and sequential fashion. Once the emergency master switch has been toggled, the following accessories will turn “ON” in approximately ____ delays in the following sequence:

1. Front steady lights
2. Tiller light bar
3. Front light bar
4. Rear amber lights
5. Intersection lights
6. High beam flash lights

NOTE: The above sequence reverses when the emergency master switch is “toggled” off.

Answer 12

half-second