Johnson Controls YVAHP072B31S, Service Manual

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Service Manual
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- Table of Contents -
2. Operation ...............................................................................................................................2-1
2.1 Indoor Unit ......................................................................................................................................2-2
2.1.1 Duct Type ...............................................................................................................................2-2
2.1.2 4-Way Cassette Type .............................................................................................................2-22
2.1.3 1-Way Cassette Type .............................................................................................................2-55
2.1.4 Wall Mount Type .....................................................................................................................2-79
2.2 Control Device ................................................................................................................................2-118
2.2.1 Wired Controller .....................................................................................................................2-118
2.2.2 Simplified Wired Controller .....................................................................................................2-163
2.2.3 Infrared (IR) Receiver Kit (for 4-Way Cassette Type) .............................................................2-172
2.2.4 Infrared (IR) Receiver Kit (for 1-Way Cassette Type) .............................................................2-192
2.2.5 Infrared (IR) Receiver Kit (for Wall Mount Type and Ducted Type) ........................................2-212
2.2.6 Mini Central Controller ...........................................................................................................2-231
2.2.7 Large Central Controller .........................................................................................................2-283
2.2.8 Computerized Central Controller Management Software ......................................................2-339
2.2.9 Computerized Central Controller Software / Operation Ratio ................................................2-375
3. Troubleshooting .....................................................................................................................3-1
3.1 Initial Troubleshooting .....................................................................................................................3-2
3.1.1 Checking Electrical Wiring and Power Source .......................................................................3-2
3.1.2 Location of Printed Circuit Boards (PCBs) .............................................................................3-11
3.1.3 Checking Rotary Switch and DIP Switch Settings .................................................................3-16
3.1.4 Checking Wired Controller .....................................................................................................3-24
3.1.5 Checking Using 7-Segment Display.......................................................................................3-31
3.1.6 Checking Alarm Code History ................................................................................................3-37
3.1.7 Emergency Operation ............................................................................................................3-44
3.2 Troubleshooting Procedures ...........................................................................................................3-49
3.2.1 Alarm Code Table ...................................................................................................................3-49
3.2.2 Troubleshooting Using Alarm Codes ......................................................................................3-50
3.2.3 Abnormalities of Devices ........................................................................................................3-123
3.3 Procedures for Checking .................................................................................................................3-136
3.3.1 Self-Checking of PCBs using Wired Controller ......................................................................3-136
3.3.2 Self-Checking of Wired Controller ..........................................................................................3-136
3.4 Test Run ..........................................................................................................................................3-137
3.4.1 Test Run Using Wired Controller ............................................................................................3-138
3.4.2 Test Run from Outdoor Unit Side ...........................................................................................3-140
3.4.3 Checking the Test Run ...........................................................................................................3-142
3.4.4 Checklist for Refrigerant System ............................................................................................3-143
3.4.5 Automatic Judgment System for Refrigerant Amount ............................................................3-145
3.4.6 Reset for Accumulated Operation Time of Compressor 1-2 (cUJ1-cUJ2)..............................3-146