Table 2-2. Cab Controls and Instruments 250 GPM Mini-Pumper Firefighting Truck (Continued)

TM5--4210-224-14&P

Table 2-2. Cab Controls and Instruments

250 GPM Mini-Pumper Firefighting Truck (Continued)

(Refer to Figure 2-2)

Key

Control or Indicator

Function

Selector Switch.

The Selector Switch is a six-position rotary switch used to select the

mode of operation. The following are the positions on the Selector

Switch.

PA - Allows operation of the public address system through the common

microphone. When the switch is in this position, the red pilot LED is

illuminated.

RADIO - In this position, incoming radio messages are amplified by the

siren and rebroadcast over the external speaker. Siren tones (WAIL,

YELP, HI-LO) do not operate in this position.

STANDBY In this position, it is possible to operate the siren by activating

the manual pushbutton or mechanical siren foot switch.

A WAIL tone will be produced using either the manual pushbutton or

mechanical foot switch.

WAIL In this position, the siren produces a continuous WAILING sound

up and down in frequency. Depressing the manual pushbutton will

produce the YELP tone.

2-30