PREVOST H3-41 Maintenance Manual page 877

6.5.6 Charging System .................................................................................................................................. 67
6.6 LIQUID REFRIGERANT RECOVERY ................................................................................................................ 68
6.7 EVACUATING SYSTEM .................................................................................................................................. 68
7. SMALL HVAC SYSTEM ................................................................................................................................... 69
7.1 SYSTEM CONFIGURATION H-SERIES ............................................................................................................ 69
7.2 SYSTEM CONFIGURATION X3 SERIES ........................................................................................................... 69
7.3 AIR CIRCULATION ......................................................................................................................................... 70
7.3.1 Auxiliary Unit ....................................................................................................................................... 70
7.4 SYSTEM OPERATION .................................................................................................................................... 70
7.4.1 Driver's Unit ......................................................................................................................................... 70
7.4.2 Auxiliary Unit - H3 Vip Vehicles Only .................................................................................................... 70
7.5 REFRIGERANT RECOVERY ............................................................................................................................. 71
7.6 EVACUATING SYSTEM PRIOR ADDITION OF REFRIGERANT (DRIVER'S OR AUXILIARY SYSTEM) .................. 71
7.7 OIL ADDITION ............................................................................................................................................... 71
7.8 COMPRESSOR OIL CONTAMINATION .......................................................................................................... 71
7.9 OIL RETURN OPERATION.............................................................................................................................. 71
8. AUXILIARY PREHEATING SYSTEM (OPTION) ................................................................................................. 72
8.1 PREHEATER FUEL FILTER .............................................................................................................................. 72
8.2 OPERATION .................................................................................................................................................. 72
8.3 PREHEATING SYSTEM TIMER ....................................................................................................................... 72
8.3.1 Preheater Timer Instructions ............................................................................................................... 72
8.4 PREHEATER TROUBLESHOOTING ................................................................................................................. 73
8.4.1 Displaying Faults On The Timer ........................................................................................................... 73
8.4.2 Heater Control Box Software Lock ....................................................................................................... 73
8.4.3 Unlocking The Control Box And Deleting The Fault Memory ............................................................... 73
8.5 PREHEATER MAINTENANCE ......................................................................................................................... 73
9. SPECIFICATIONS ........................................................................................................................................... 75
SECTION 22: HEATING AND AIR CONDITIONING
PA1621 Maintenance Manual All Series | Revised February 2019 3