PREVOST X3-45 COMMUTER User Manual

SECTION 22: HEATING AND AIR CONDITIONING
38
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
PROBABLE CAUSE PROBABLE REMEDY
poor air distribution or liquid flow.
correct air or liquid distribution.
HIGH SUCTION PRESSURE-HIGH SUPERHEAT
Internally leaking compressor Locate leak. Repair/ replace.
HIGH SUCTION PRESSURE-LOW SUPERHEAT (DEFECTIVE UNLOADER)
Valve superheat setting too low.
Adjust superheat as outlined under "Superheat
Adjustment".
Compressor discharge valves leaking. Replace or repair discharge valve.
Incorrect superheat adjustment.
Superheat adjustment 12 to 16°F.
FLUCTUATING DISCHARGE PRESSURE
Insufficient charge. Add R-134a to system.
HIGH DISCHARGE PRESSURE
Air or non-condensable gases in condenser. Purge and recharge system.
Overcharge or refrigerant. Recover to proper charge.
Condenser dirty. Clean condenser.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in