Nilfisk-Advance SR 1900 Service Manual

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Nilfisk-Advance SR 1900 Service Manual Manual pdf 2 page image

CONTENTSContents ............................................................................................................................................................................... iiiFigures..................................................................................................................................................................................ivSection 1 — Introduction ................................................................................................................................................ 1-3SR 1900 Deluxe Cab Options ...............................................................................................................................................1Other Manuals Available........................................................................................................................................................1General Notes .......................................................................................................................................................................1Cautions and Warnings .........................................................................................................................................................2Symbols .................................................................................................................................................................................2General Safety Instructions ...................................................................................................................................................2Technical Specifications ........................................................................................................................................................3Section 2 — Know Your Machine ................................................................................................................................... 4-6Cab Controls..........................................................................................................................................................................4Heating System Components ................................................................................................................................................5Air Conditioning System Components ...................................................................................................................................6Section 3 — Maintenance ...................................................................................................................................................7Maintenance Schedule ..........................................................................................................................................................7To Clean and Replace the Cab Filter.....................................................................................................................................7Section 4 — Heating System ........................................................................................................................................ 8-12General System Overview .....................................................................................................................................................8Electrical Circuit Overview .....................................................................................................................................................8Heater Blower Motor..............................................................................................................................................................8Heater Temperature Control ..................................................................................................................................................8Electrical Troubleshooting ................................................................................................................................................9-11Symptom: The heater Blower Motor will not run....................................................................................................................9Symptom: There is no cab heat, or the cab heat cannot be controlled. .........................................................................10-11To Eliminate Air Locks from the Cooling System .................................................................................................................12Cooling System Vacuum Filler.............................................................................................................................................12Purge the Heater Circuit ......................................................................................................................................................12Section 5 — Air Conditioning System ....................................................................................................................... 13-20General System Overview ...................................................................................................................................................13Electrical Circuit Overview ...................................................................................................................................................13Blower Motors......................................................................................................................................................................13Condenser Fan, Thermostat, Pressure Switch and Compressor Motor ..............................................................................14Electrical Troubleshooting ...................................................................................................................................................15Symptom: One or both of the Blower Motors will not run. ...................................................................................................15Symptom: The Blower Motors run but there is no cold air coming out of the Evaporator-Heater Unit. ...............................16Component Troubleshooting ...............................................................................................................................................17Compressor Motor Hydraulic Valve (L10)............................................................................................................................17Accessory (Gear) Hydraulic Pump ......................................................................................................................................17Compressor Relay (K10) .....................................................................................................................................................18Binary Pressure Switch (S34)..............................................................................................................................................19Thermostat (S33).................................................................................................................................................................20Section 6 — Appendix .......................................................................................................................................................21Cab Electrical Wiring Diagram.............................................................................................................................................21Cab Electrical Ladder Diagram............................................................................................................................................22Heating and A/C System Plumbing and Hydraulic Schematic.............................................................................................23FIGURESFigure 1-1 — SR 1900 Cab Height........................................................................................................................................3Figure 2-1 — Cab Controls....................................................................................................................................................4Figure 2-2 — Heating System Components ..........................................................................................................................5Figure 2-3 — Air Conditioning System Components .............................................................................................................6Figure 3-1 — Cab Filter .........................................................................................................................................................7Figure 4-1 — Valve Assembly Connector Pins ....................................................................................................................10Figure 4-2 — Valve Assembly Hose Functions ...................................................................................................................12Figure 5-1 — Compressor Motor Hydraulic Valve ...............................................................................................................17Figure 5-2 — Compressor Relay .........................................................................................................................................18Figure 5-3 — Checking Continuity through the Binary Pressure Switch .............................................................................19Figure 5-4 — Checking Continuity through the Thermostat ................................................................................................20