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pressed, the display will show a larger or smaller flashing segment
which represents a corresponding higher or lower temperature.
The master control unit can only adjust the temperature within a 9° F
range. The center of this range is determined by the setting on cabin
temperature control located on the copilot’s subpanel. The master
control unit can adjust the cabin temperature in small increments up to
a maximum of 4.5° F above, or down to 4.5° F below the current setting
on the copilot’s cabin temperature control. The copilot’s cabin
temperature control can be adjusted in a much wider range, between
60°F and 90° F.
REMOTE CABIN TEMPERATURE CONTROL PANEL
Figure 7-15
SELECT
SELECT
MENU
MUTE
MONITOR
MASTER CONTROL UNIT
C H
Pilot’s Manual
7-36 PM-126A
CABIN MANAGEMENT SYSTEM
(Aircraft 45-232, 45-236 thru 45-2000)
DESCRIPTION
An Audio International cabin management system has been installed
in the aircraft to manage various cabin systems and components. These
systems and components include cabin lights, lavatory lights, cabin audio
and video entertainment systems (if installed), cabin temperature,
galley equipment, and water system (if installed). The cabin management
system uses discrete signal lines or a two-wire, bidirectional data
bus for communication between components.
This Audio International cabin management system consists of a
switch control unit, a cockpit switch panel, an entry switch panel, a galley
switch panel, a lavatory switch panel, eight Lighting Control Unit
(LCU) switch panels, a Passenger Interface Unit (PIU) and a Master
Control Unit (MCU) switch panel. The following table lists the cabin
management system components and locations.
CABIN MANAGEMENT SYSTEM COMPONENTS/LOCATIONS
Figure 7-16
Galley Switch Panel
The galley switch panel controls the hot liquid container, second hot
liquid container (if installed), and galley drain system (if installed).
Cockpit Switch Panel
The cockpit switch panel controls the cabin lights, entry light, and reading/
table lights. This unit can also disable all cabin switch panels.
Entry Switch Panel
The entry switch panel controls the cabin wash lights, lavatory wash
lights, cockpit lights, entry light, reading/table lights, and the optional
exterior lighting system (if installed).
Component Location
Cockpit switch panel Copilot’s sidewall panel
Entry switch panel Forward left cabinet aft face
Galley switch panel Forward right cabinet header
Lavatory switch panel Lavatory cabinet backsplash
Lighting Control Unit (LCU) (8) Cabin side ledge (7) and PSU (1)
Master Control Unit (MCU) VIP seat side ledge
Passenger Interface Unit (PIU) Behind side ledge
Switch control unit Forward left cabinet
PAX CTRLS circuit breaker Copilot’s circuit breaker panel
Pilot’s Manual
PM-126A 7-37
Lavatory Switch Panel
The lavatory switch panel controls the toilet flush, lavatory wash and
spot lights. This unit includes an ordinance sign. This switch panel also
controls the optional water pump and sink drain system (if installed).
Lighting Control Unit (LCU)
The LCU allows the passengers to control the reading and table lights.
Passenger Interface Unit (PIU)
The PIU provides the communication interface for the aft right PSU
mounted LCU.
Master Control Unit (MCU)
The MCU communicates with the other units and allows the occupant
of the VIP seat to control the cabin wash lights, cabin temperature, and
other cabin functions.
OPERATION
The Audio International cabin management system utilizes a bidirectional
data bus and discrete outputs to control switching functions. Actuation
of a discrete push button control switch sends a signal directly
to the device being controlled. Actuation of a push button control
switch on the data bus sends a data word to the bidirectional data bus.
Each data word is addressed to a particular device. The addressed device
decodes the data word, activates the appropriate control or function,
and sends a feedback response to the control switch to change the
LED display (if applicable).
Consult the manufacturer’s documentation for complete programming
and operating instructions.
Pilot’s Manual
7-38 PM-126A
CABIN MANAGEMENT SYSTEM
EQUIPMENT AND CIRCUIT BREAKER LOCATION (TYPICAL)
Figure 7-17
Equipment Location Control Circuit Breaker/s
Cabin Audio Amplifier Aft Lavatory
SPKRS (Pilot's CB Panel)
CABIN PA (Pilot's CB Panel)
Master Control Unit (MCU) LH or RH Side Ledge
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