York YCUL0065EE - Page 7

JOHNSON CONTROLS
7
Form 150.63-NM9
Issue date: 5/20/2021
Table of contents (cont’d)
Compressor Run Status ...............................................................................................................................145
Alarm Status ................................................................................................................................................. 145
BAS/EMS Discharge Air Temperature Reset Using a Voltage or Current Signal .........................................146
SECTION 9 – SERVICE AND TROUBLESHOOTING .....................................................................................147
Clearing History Buffers................................................................................................................................147
Service Mode ...............................................................................................................................................147
Service Mode – Outputs ............................................................................................................................... 147
Service Mode – Condensing Unit Configuration ..........................................................................................148
Service Mode – Analog and Digital Inputs ....................................................................................................148
Control Inputs/Outputs .................................................................................................................................149
Checking Inputs and Outputs .......................................................................................................................151
SECTION 10 – MAINTENANCE .........................................................................................................................159
Important ......................................................................................................................................................159
Compressors ................................................................................................................................................159
Condenser Fan Motors .................................................................................................................................159
Condenser Coils ........................................................................................................................................... 159
Operating Parameters ..................................................................................................................................159
On-Board Battery Back-Up ...........................................................................................................................159
Overall Unit Inspection .................................................................................................................................159
BACnet, Modbus, and YorkTalk 2 Communications .....................................................................................160