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Work equipment linkage ..................................................................................................... 60-65
Bucket .............................................................................................................................. 60-69
Work equipment cylinder .................................................................................................... 60-71
Cab and its attachments ............................................................................................................ 60-72
Cab mount ........................................................................................................................ 60-72
Electrical system ...................................................................................................................... 60-73
Bucket positioner ............................................................................................................... 60-73
Fork positioner ................................................................................................................... 60-74
Remote boom positioner..................................................................................................... 60-75
80 Appendix...................................................................................................................................... 80-1
Table of contents ........................................................................................................................ 80-2
Air conditioner components ......................................................................................................... 80-3
Precautions for refrigerant..................................................................................................... 80-3
Air conditioner component .................................................................................................... 80-4
Configuration and function of refrigeration cycle...................................................................... 80-6
Outline of refrigeration cycle.................................................................................................. 80-7
Air conditioner unit ............................................................................................................... 80-9
Dual pressure switch .......................................................................................................... 80-14
Air conditioner controller ..................................................................................................... 80-15
Compressor....................................................................................................................... 80-16
Condenser ........................................................................................................................ 80-17
Receiver drier .................................................................................................................... 80-18
Sunlight sensor .................................................................................................................. 80-20
Outer temperature sensor (outside air temperature sensor) ................................................... 80-21
Procedure for testing and troubleshooting ............................................................................ 80-22
Circuit diagram and arrangement of connector pins............................................................... 80-24
System diagram................................................................................................................. 80-27
Parts and connectors layout................................................................................................ 80-30
Testing with self-diagnosis function ...................................................................................... 80-35
How to open the electrical system abnormality record screen in service mode of the machine
monitor ................................................................................................................ 80-36
Testing temperature control system ..................................................................................... 80-38
Testing vent (mode) changeover.......................................................................................... 80-40
Testing FRESH/RECIRC air changeover.............................................................................. 80-42
Testing evaporator temperature sensor ................................................................................ 80-44
Testing relays .................................................................................................................... 80-46
Troubleshooting chart 1 ...................................................................................................... 80-48
Troubleshooting chart 2 ...................................................................................................... 80-49
Information in troubleshooting table ..................................................................................... 80-51
Failure code list related to air conditioner.............................................................................. 80-52
Failure code [879AKA] A/C Inner Sensor Open Circuit .......................................................... 80-53
Failure code [879AKB] A/C Inner Sensor Short Circuit........................................................... 80-55
Failure code [879BKA] A/C Outer Sensor Open Circuit.......................................................... 80-57
Failure code [879BKB] A/C Outer Sensor Short Circuit .......................................................... 80-59
Failure code [879CKA] Ventilating Sensor Open Circuit ......................................................... 80-61
Failure code [879CKB] Ventilating Sensor Short Circuit ......................................................... 80-63
Failure code [879DKZ] Sunlight Sensor Open or Short Circuit ................................................ 80-65
Failure code [879EMC] Ventilation Damper Abnormality ........................................................ 80-67
Failure code [879FMC] Air Mix Damper Abnormality ............................................................. 80-70
A-1 Troubleshooting for power supply and CAN communication system (Air conditioner does
not operate).......................................................................................................... 80-73
A-2 Troubleshooting for compressor and refrigerant system (Air is not cooled) ........................ 80-76
A-3 Troubleshooting for blower motor system (No air comes out or air flow is
abnormal) ............................................................................................................ 80-79
A-4 Troubleshooting for FRESH/RECIRC air changeover ...................................................... 80-82
Troubleshooting with gauge pressure................................................................................... 80-84
Connection of service tool................................................................................................... 80-87
Precautions for disconnecting and connecting hoses and tubes in air conditioner
circuit................................................................................................................... 80-89
WA320-7
00 Index and foreword
Index
00-15
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