PREVOST H3-41 Maintenance Manual

SECTION 06A: H3 SERIES ELECTRICAL
34
PA1621 Maintenance Manual All Series | January 2017
 The main power compartment door fan
starts running for 3 seconds (will not run if
door is open). [10 seconds
delay]
 A/C compressor clutch activated 3 times.
[5 seconds
delay]
 Radiator fan clutch is disengaged (fan can
be turned freely by hand). [3 seconds
delay]
 Fan clutch engages in speed 1 (fan can be
turned by hand but with a certain
resistance). [3
seconds delay]
 Fan clutch engages in speed 2 (cannot be
turned but hand). [10 seconds
delay]
5 beeps from the back-up alarm indicate to go to
the spare wheel compartment behind the
reclining bumper.
Inside the spare wheel compartment:
 Auxiliary unit refrigerant solenoid valve
activates 3 times. [10 seconds
delay]
 Hot water pump starts running for 5
seconds.
 Driver’s unit refrigerant solenoid valve
activates 3 times.
 Driver’s unit hot water pneumatic valve
cycles 3 times.
 Closing of the fresh air dampers.
To exit the electric motors test sequence,
press ESCAPE button, select STOP TEST
submenu and then press ENTER button
twice.
6.6 FORCED ACTIVATION OF THE
RADIATOR FAN CLUTCH
To prevent the engine from overheating in case
of malfunction of the clutch activation system, it
is possible to force activation of the clutch.
1. On the Driver Information Display, select
DIAGNOSTICS menu. Select VEHICLE
TESTS submenu and then ACTIVATE
RADIATOR FAN SPEED 1 or ACTIVATE
RADIATOR FAN SPEED 2 as required.
2. The DID status line will show TEST to
confirm the forced activation of the radiator
fan clutch. To cancel, turn the ignition
switch to the OFF position or press
ESCAPE button, select STOP TEST
submenu and then press ENTER button
twice. TEST will disappear from the DID
status line.
If the fan clutch does not engage using this
procedure then the clutch is faulty or the wiring
between the multiplex module and the clutch is
faulty. Mechanically lock the fan clutch as
described in section 05: COOLING
SYSTEM of
the maintenance manual.

PREVOST H3-41 Specifications

General

Brand	PREVOST
Model	H3-41
Category	Motorhomes
Language	English