Main Battery Disconnect Switch; Circuit Breakers And Fuses; Lavatory Emergency; Tools - MCi J4500 Operator's Manual

Figure 70. Tools

MAIN BATTERY DISCONNECT SWITCH

Activate the disconnect feature of the main battery
disconnect (MDS) system by turning the rotary switch
45 degrees counter-clockwise to OFF (located in the
battery compartment) ( Figure 71 ).
Figure 71. MDS Rotary Switch
The multiplex modules installed on MCI coaches
have been programmed with a system sleep mode.
After thirty (30) minutes of no coach system activity,
the power management supply module will remove
electrical power from all the components connected to
the main disconnect switch (now a rotary switch,
located in the battery compartment). When the coach
goes into sleep mode after thirty (30) minutes, coach
power is turned OFF which allows the coach systems
to conserve coach power, (providing that the hazard
June 2016
lights and master power switch are in the OFF
position).
To turn ON (wake up) power from the exterior of
the coach, press the exterior entrance door open
switch. To turn ON (wake up) coach power from the
interior of the coach when the coach is in sleep mode,
press the entrance door open rocker switch or position
the ignition rocker switch to the RUN position.

CIRCUIT BREAKERS AND FUSES

Self-resetting circuit breakers, located in the
battery compartment on the curb side of the coach,
provide overload and short circuit protection for the
main HVAC blowers, condenser fans, driver's
evaporator blowers and 12 and 24 volt relay modules.
Three self-resetting circuit breakers for the driver's
blowers are in the control box for the driver's
evaporator, and two self-resetting circuit breakers for
the parcel rack blowers are located in the fuse box.
Fuses, provided for the auxiliary heater, engine
ECM, transmission ECU, interlock modules, door
sensors and HVAC controllers, are located in the
battery compartment fuse box.

LAVATORY EMERGENCY

A momentary ON lavatory emergency button is
located in the lavatory compartment ( Figure 72 ).
Pressing this button will illuminate the LAV EMERG
tell-tale and activate a buzzer. Releasing the button
cancels the tell-tale and buzzer.
Figure 72. Lavatory Emergency Button
53