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FORM 50.40-OM2
5YORK INTERNATIONAL
System Architecture.................................................................................. 66
Microboard................................................................................................ 68
Microboard Program Jumpers .................................................................. 76
Microboard Program Switches ................................................................. 78
Liquid Crystal Display.............................................................................. 81
Display Interface Board ............................................................................ 87
Display Backlight Inverter Board ............................................................. 89
Keypad .................................................................................................... 91
Power Supply ............................................................................................ 94
Ofine Diagnostics & Troubleshooting.................................................... 96
Main Diagnostics ...................................................................................... 97
Keypad Test............................................................................................... 98
Display Test .............................................................................................. 99
Bit Pattern Test ....................................................................................... 100
Serial Inputs / Outputs Tests ................................................................... 101
Digital Inputs / Outputs Tests ................................................................. 103
Analog Inputs Test .................................................................................. 104
System Commissioning Checklist .......................................................... 105
SECTION 6 PART NUMBER AND RENEWAL PARTS........................................... 106
LIST OF TABLES
TABLE 1 – Required Software Version of the Chiller/Condensing Unit Eproms ..........11
TABLE 2 – Program Jumpers .........................................................................................76
TABLE 3 – Program Switches ........................................................................................ 78
TABLE 4 – Part Number ...............................................................................................106
TABLE 5 – Renewal Parts ............................................................................................ 106