York SSS 7L-B Operation Manual page 6

SECTION 8 - MAINTENANCE AND TROUBLESHOOTING .................................................................................35
Manually Running The Closed Loop Coolant Pump ...................................................................................... 35
Coolant Maintenance ..................................................................................................................................... 35
Troubleshooting The Closed Loop Coolant Pump ..........................................................................................35
Troubleshooting Processes ............................................................................................................................ 35
Verify Shorted SCR ........................................................................................................................................ 36
Verify Open or Shorted SCR Gate ................................................................................................................. 36
Verify Gate Driver Output ............................................................................................................................... 36
Verify Real Phase Current Imbalance ............................................................................................................ 37
Verify False Phase Current Imbalance ........................................................................................................... 38
Removing SCR Assemblies .......................................................................................................................... 38
Installing SCR Assemblies ............................................................................................................................ 39
6
TABLE OF CONTENTS (CONT'D)
FORM 160.00-O2
ISSUE DATE: 04/30/2019
JOHNSON CONTROLS