PREVOST X3-45 COMMUTER, Руководство по обслуживанию

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SECTION 06: ELECTRICAL
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version) – Sec 06 revised June 2017 27
A. The battery charger must be connected to a
110-120 volt power supply. If not, the test
will be interrupted when the voltage drops
below 24 volts,
B. Engine not running,
C. Parking brake applied,
Danger
Before starting the test sequence, make sure
nobody is working in the evaporator or
condenser compartment.
Note
The back-up alarm will beep ten (10) times
prior the test starts to warn people that may be
working on the vehicle.
To enter this mode:
1. Using the dashboard DID, select
diagnostics menu and press enter button ;
2. Select vehicle test, press enter button then
select motor test sequence and press enter
button to initiate the test mode for electrical
motors;
3. Ten (10)
beeps
can be heard indicating the
motor test mode has started.
Using the test mode:
During the entire test, the instrument panel
audible alarm gives a signal each second to
remind that the motor test mode is underway.
4.5.1 Test Sequence
Go to the condenser compartment:

The condenser fans run at speed 1 for 3
seconds, then after a short pause, run at
speed 2 for 3 seconds.

The passenger's unit refrigerant solenoid
valve activates 2 times (audible “clicks” will
be heard).

The overhead compartments a/c unit
refrigerant solenoid valve activates 2 times
(audible “clicks” will be heard).

The haldex consep oil separator automatic
drain valve activates 3 times (audible “clicks”
will be heard).
Then 5 beeps can be heard from the back-up
alarm to indicate to go to the engine
compartment.
In the engine compartment, the sequence is
as follows:

The fan mounted on the engine
compartment curbside door engages in
speed 1 and then in speed 2.

A/c compressor clutch activates 3 times
(audible “clicks” will be heard).

Right compressor unloader activates 3 times
(audible “clicks” will be heard).

Fan clutch is disengaged (fan can be turned
freely by hand, 3 seconds delay).

Fan clutch engages in speed 1 for 3
seconds (fan can be turned by hand but a
certain strength is needed).

Fan clutch engages in speed 2 for 3
seconds (cannot be turned but hand).
5 beeps from the back-up alarm indicate to go to
the evaporator compartment.
In the evaporator compartment:

Evaporator fan motor runs at speed 1 for 3
seconds then runs at speed 2 for 2 seconds.

Hot water pump starts running for 5 seconds
and hot water pneumatic valve cycles 3
times.
5 beeps from the back-up alarm indicate to get
to the driver’s area inside the vehicle.
Inside the vehicle:

The driver's HVAC unit refrigerant solenoid
valve cycles 3 times and the hot water
pneumatic valve cycles 3 times also (audible
“clicks” will be heard).

Left and right overhead compartment fans
run one after the other for 5 seconds.