York R123 - Manual (Page 138)

YORK INTERNATIONAL
138
FORM 160.55-O1 (604)
Troubleshooting
SECTION 7
TROUBLE SHOOTING
TABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE
CONTROL CENTER DISPLAY
CONTROL CENTER DISPLAY GOVERNING CONTROL FUNCTION
DAY OF TIME CAUSE OF METHOD OF DESCRIPTION OPERATING POINT
WEEK OF DAY SHUTDOWN RESTART ON RISE ON FALL
MON. 10:00 AM Low Water Autostart Low Water (LWT) Chilled water 4°F below chilled
Temperature setpoint water setpoint
MON. 10:00 AM Low Water Autostart Low Water (LWT) Chilled water 4°F below chilled
Temperature VSD setpoint water setpoint
MON. 10:00 AM Flow Switch Autostart Flow Switch
MON. 10:00 AM System Cycling Autostart A remote command
(computer relay contact or
manual switch)
MON. 10:00 AM Multi-Unit Cycling Autostart (Optional)
Lead-Lag Sequence Control
MON. 10:00 AM Internal Clock Autostart Internal Clock
MON. 10:00 AM AC Undervoltage Autostart <15% FLA for 25
continuous seconds
MON. 10:00 AM Power Fault Autostart CM-2 Current Module or
Solid State Starter
Remote Stop Energy Management System
MON. Anti-Recycle, Anti-Recycle
20 Min. Left Timer
MON. 10:00 AM Low Evap. Press. Low Evap. Pressure 5.43 PSIA 5.42 PSIA
Transducer (LEP)
MON. 10:00 AM Low Evap. Press. LEP external control Set to Job Spec. Set to Job Spec.
Brine (Brine units only)
MON. 10:00 AM Low Oil Low Oil Press. Transducer (OP) 20 PSID 15 PSID
Pressure High Oil Press. Transducer (OP)
MON. 10:00 AM High Pressure High Pressure 15 PSIG 9 PSIG
Safety Control (HP)
MON. 10:00 AM Evap. Transducer Evap. Pressure Transducer
or Probe Error or Leaving Chilled Water
Thermistor (RS1)
MON. 10:00 AM Motor Controller - CM-2 or Solid State Starter or
Ext. Reset Variable Speed Drive
MON. 10:00 AM High Discharge Discharge Temperature 220°F 219°F
Temperature Thermistor (RT2)
MON. 10:00 AM High Oil Oil Temperature 180°F 179°F
Temperature Thermistor (RT3)
MON. 10:00 AM Power Autostart Microboard undervoltage 8.29VDC 7.84VDC
Failure circuit on 5V unregulated
supply
MON. 10:00 AM Power Microboard undervoltage 8.29VDC 7.84VDC
Failure circuit on 5V unregulated
supply
SHUTDOWN CAUSE
CONTROL CENTER DISPLAY