Johnson Controls YVAHP0721CW Series, Service Manual

Page: 11 / 416

SM-16007
ix
- Table of Contents -
1. Installation ..............................................................................................................................1-1
1.1 Outdoor Unit ....................................................................................................................................1-2
1.2 Optional Parts..................................................................................................................................1-75
1.2.1 For Outdoor Unit ....................................................................................................................1-75
1.2.1.1 Drain Adaptor ....................................................................................................................1-76
1.2.1.2 Protection Net ...................................................................................................................1-78
1.2.1.3 Snow Protection Hood ......................................................................................................1-87
1.2.1.4 Topping Prevention Tool ....................................................................................................1-113
1.2.1.5 Seismic Kit ........................................................................................................................1-115
1.2.2 Piping Kit ................................................................................................................................1-119
1.2.2.1 Piping Connection Kit ........................................................................................................1-120
1.2.2.2 Multi-Kit (Line Branch) ......................................................................................................1-130
1.2.2.3 Multi-Kit (Header Branch) .................................................................................................1-139
2. Operation ...............................................................................................................................2-1
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) .............................................................................3-6
3.1.3 Checking Rotary Switch and DIP Switch Settings .................................................................3-10
3.1.4 Checking Wired Controller .....................................................................................................3-13
3.1.5 Checking Using 7-Segment Display.......................................................................................3-20
3.1.6 Checking Alarm Code History ................................................................................................3-26
3.1.7 Emergency Operation ............................................................................................................3-33
3.2 Troubleshooting Procedures ...........................................................................................................3-38
3.2.1 Alarm Code Table ...................................................................................................................3-38
3.2.2 Troubleshooting Using Alarm Codes ......................................................................................3-39
3.2.3 Abnormalities of Devices ........................................................................................................3-106
3.3 Procedures for Checking .................................................................................................................3-110
3.3.1 Self-Checking of PCBs using Wired Controller ......................................................................3-110
3.3.2 Self-Checking of Wired Controller ..........................................................................................3-110
3.4 Test Run ..........................................................................................................................................3-111
3.4.1 Test Run Using Wired Controller ............................................................................................3-112
3.4.2 Test Run from Outdoor Unit Side ...........................................................................................3-114
3.4.3 Checking the Test Run ...........................................................................................................3-116
3.4.4 Checklist for Refrigerant System ............................................................................................3-117
3.4.5 Reset for Accumulated Operation Time of Compressor 1-2 (cUJ1-cUJ2)..............................3-119