Test Sequence - Vip With Central Hvac System - PREVOST H3-41 Maintenance Manual

SECTION 06: ELECTRICAL
4.2.2 Test Sequence – VIP With Central HVAC System
Test Sequence – VIP With Central HVAC System
Go to the condenser compartment
Then 5 beeps can be heard from the back-up alarm to indicate to go to the engine compartment and main
power compartment.
In the engine compartment,
sequence is as follows
5 beeps from the back-up alarm indicate to go to the evaporator compartment.
In the evaporator compartment
5 beeps from the back-up alarm indicate to go to the spare wheel compartment behind the reclining
bumper.
Inside the spare wheel compartment
To exit the electric motors test sequence, press ESCAPE button, select TERMINATE TESTS &
FORCED STATES submenu and then press ENTER button twice.
30 PA1621 Maintenance Manual All Series | Revised Sept 2019
Driver's & passenger's unit fresh air damper
•
open. [20 seconds delay]
The condenser fans start. Speed will gradually
•
increase to maximum speed. [3 seconds delay]
• The passenger's unit refrigerant solenoid valve
activates 3 times. [10 seconds delay]
the
• The main power compartment fan activates for 3
seconds.
A/C compressor clutch activates 3 times.
•
• A/C compressor unloader activates 3 times.
The electric cooling fans start running for 20
•
seconds.
• 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.
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.