![background image](http://html.mh-extra.com/html/johnson-controls/metasys-asc/metasys-asc_networking-and-troubleshooting-manual_2023792001.webp)
Application Specific Controllers Technical Manual
636.3
Introduction Section
Technical Bulletin
Issue Date
0995
©
1995 Johnson Controls, Inc.
1
Code No. LIT-6363003
Introduction
Page
3
●
Overview
*3
●
Who Should Read This?
3
Installing ASC Controllers
5
●
Tools Required
5
●
ASC Installation Steps
6
Installing the N2 Bus
11
●
Background Information
11
●
N2 Bus Installation Steps
20
Troubleshooting N2 Bus Installation
23
●
Overview
23
●
Troubleshooting Chart
24
●
TEST 1: Earth Grounded 24 VAC Load
25
●
TEST 2: Ground Loop (Isolation)
26
●
TEST 3: N2 Bus Polarity, Shorts, Crossed Wires, Grounds
27
●
TEST 4: Oscilloscope
28
●
Diagnostic LEDs on the AHU
29
Installing UNTs Used with Gas Ignition Devices
31
ASC and N2 Bus
Networking and Troubleshooting Guide
* Indicates those sections where changes have occurred since the last printing.
Summary of Contents for METASYS ASC
Page 4: ...4 Introduction ASC and N2 Bus Networking and Troubleshooting Guide ...
Page 10: ...10 Introduction ASC and N2 Bus Networking and Troubleshooting Guide ...
Page 30: ...30 Introduction ASC and N2 Bus Networking and Troubleshooting Guide ...
Page 32: ...32 Introduction ASC and N2 Bus Networking and Troubleshooting Guide ...
Page 42: ...42 Introduction ASC and N2 Bus Networking and Troubleshooting Guide ...