PREVOST H3-45 2023 User Manual

Problem / Symptom Probable Causes Actions
Fire alarm pop- upand
audible alarm always ON
and there is no fire or
high temperature in the
engine compartment
Short-circuited fire sensor or
defective sensor
Prior to start the vehicle, cycle the ignition
key to the ON position, OFF position and
then ON position again and then start the
vehicle. This will deactivate the fire alarm
function. This has to be repeated each time
the vehicle is restarted.
The vehicle is parked and
the electrical horn is
activated to indicate a fire
in the engine
compartment but there is
no fire
Short-circuited fire sensor or
defective sensor
Cycle the ignition key between the ON and
OFF position twice within 3 seconds. This
will deactivate the fire alarm function. This
has to be repeated each time the vehicle is
parked
A single light, a group of
LED lights or another
function of the vehicle is
not functioning
The multiplex outputs are
protected in current by an
internal “soft fuse”. When an
output is shorted, it turns
OFF and stays OFF until the
"soft fuse" is reset
turn the ignition key to the OFF position and
turn to the ON position again. This resets all
"soft fuses"
No backlighting in the
instrument cluster
Circuit breaker CB10 is
tripped or fuse F10/F29
blown
Check circuit breaker CB2, CB10
Check / replace fuse F10, F29
Check / replace relay R22, R23
The radiator/CAC electric
fans do not function and
the engine is overheating
You can manually engage the radiator/CAC
fans half-speed (50%) or full speed (100%).
1. On the Driver Information Display, select
DIAGNOSTICS menu. Select VEHICLE
TESTS submenu and then FORCE
RADIATOR FAN SPEED 50% or FORCE
RADIATOR FAN SPEED 100%.
2. The DID status line will show TEST to confirm
the forced activation of the radiator fans. To
cancel, turn the ignition switch to the OFF
position or press ESCAPE button, select
TERMINATE TESTS & FORCED STATES
submenu and then press ENTER button
twice. TEST will disappear from the DID
status line.
PA-1652 Operator's Manual H3-45 Coach
B-8 Multiplex Troubleshooting

PREVOST H3-45 2023 Specifications

General

Manufacturer	Prevost
Model	H3-45
Year	2023
Category	Buses
Engine	Volvo D13
Horsepower	500 hp
Length	45 ft
Width	102 in
Seating Capacity	56 passengers
Air Conditioning	Yes
GVWR	54, 000 lbs
Entertainment System	Available