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FORM 160.55-O1 (604)
139
YORK INTERNATIONAL
7
TABLE 1 – CAUSES OF NOR MAL AND SAFE TY SYS TEM SHUT DOWNS IN AC COR DANCE WITH THE
CONTROL CENTER DISPLAY - CONTINUED
PROGRAMMED START-UP OF PROBABLE CAUSE
SETPOINTS SYSTEM AFTER AND SERVICE
BY OPERATOR SHUTDOWN REQUIRED
4°F below chilled water Automatic Restart when water reaches setpoint. System load is less than minimum capacity.
setpoint (If set to 40°F would If system is running and setpoint is increased
be 36°F.) (36°F minimum) 4°F, system will continue to run, as LWT cutout
shifts to a fixed 36°F for 10 minutes.
4°F below chilled water If system is running and setpoint is increased System load is less than minimum capacity.
setpoint (If set to 40°F would 4°, VSD will Initiate Shutdown. Automatic Restart
be 36°F.) (36°F minimum) when water temperature reaches setpoint.
Automatic Restart when water flow is restored to Lack of water flow.
close flow switch. Check operation of chilled water pump.
Automatic Restart upon remote command. Contact - connected to the Remote/Local
cycling input of the Digital Input Board.
Automatic Restart upon remote command. Contact - connected to the Multi-Unit
cycling input of the Digital Input Board.
Daily Schedule programmed Will automatically restart when programmed Pressing Compressor Start Switch
to shut down unit. schedule permits. overrides the program.
Cycling shutdown occurs when motor current is
>15% FLA for 25 seconds during chiller operation.
Will start automatically following coastdown. Motor Controller contacts opening and closing in less
than 3 seconds due to a power fault condition.
Start up by start signal from remote start switch. Remote Stop Contact Closure.
Will not start until 30 minute Will restart when time left = 00 minutes. Minimum time between successive compressor
timer is timed out. starts is 30 minutes.
To restart, press compressor switch from See OPERATING ANALYSIS, Table 2
STOP/RESET to START position. Symptom 2.
To restart, press compressor switch from See OPERATING ANALYSIS, Table 2
STOP/RESET to START position. Symptom 2.
Will restart when pressure increases to 20 PSID. See OPERATING ANALYSIS, Table 2
To restart, press compressor switch from Symptom 4, 5, 6, 7, 9, 10, 11.
STOP/RESET to START position.
Will restart when pressure falls to 9 PSIG. See OPERATING ANALYSIS, Table 2
To restart, press compressor switch from Symptom 1 - High Discharge Pressure.
STOP/RESET to START position.
To restart, press compressor switch from Defective Evap. Pressure Transducer or Leaving
STOP/RESET to START position. Chiller Water thermistor (RS1). LCWT minus
saturation temp. is less than -2.5°F or greater than
25°F. Checked every 10 minutes following a 10-min.
bypass at start-up.
Reset the device that caused the shutdown. CM-2 or Solid State Starter or Variable Speed
Chiller will start automatically. Drive has shut down chiller.
To restart, press compressor switch from Condenser tubes dirty or scaled or high condenser
STOP/RESET to START position. water temperature. See Symptom 1, Table 2.
To restart, press compressor switch from Dirty oil filter or restricted oil cooler line. Change oil
STOP/RESET to START position. filter. See Symptom 9, Table 2.
Optional AUTO Restart Plug Will restart automatically when voltage reaches Power Failure.
is installed on Microboard. 8.29VDC. An undervoltage circuit on Microboard
monitors the 5VDC unregulated supply for an
undervoltage condition.
Auto restart plug is removed To restart, press compressor switch to STOP/ Power Failure.
on Microboard. RESET position and then to START position.