York YLUA0248 Series Installation Operation & Maintenance page 7

FORM 150.73-NM2
ISSUE DATE: 09/07/2020
Compressor Run Status ............................................................................................................................... 133
Alarm Status ................................................................................................................................................. 133
BAS/EMS Discharge Air Temperature Reset Using A Voltage Or Current Signal ....................................... 134
SECTION 9 - SERVICE AND TROUBLESHOOTING .....................................................................................135
Clearing History Buffers................................................................................................................................ 135
Service Mode ............................................................................................................................................... 135
Service Mode - Outputs ............................................................................................................................... 135
Service Mode - Condensing Unit Configuration ..........................................................................................136
Service Mode - Analog And Digital Inputs ................................................................................................... 136
Control Inputs/Outputs ................................................................................................................................. 137
Checking Inputs And Outputs ....................................................................................................................... 139
Optional Printer Installation .......................................................................................................................... 143
Troubleshooting ............................................................................................................................................ 144
SECTION 10 - MAINTENANCE .........................................................................................................................147
Important ...................................................................................................................................................... 147
Compressors ................................................................................................................................................ 147
Condenser Fan Motors ................................................................................................................................. 147
Condenser Coils ........................................................................................................................................... 147
Operating Parameters .................................................................................................................................. 147
On-Board Battery Back-Up ........................................................................................................................... 147
Overall Unit Inspection ................................................................................................................................. 147
ISN Control ................................................................................................................................................... 148
BACnet And Modbus Data Communication ................................................................................................. 151
JOHNSON CONTROLS
TABLE OF CONTENTS (CONT'D)
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