Specifications

YORK INTERNATIONAL 47
FORM 160.48-O1
TABLE 1 - CAUSES OF NORMAL AND SAFETY SYSTEM SHUTDOWNS IN ACCORDANCE WITH THE
MICROCOMPUTER 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 STOP/RESET See OPERATING ANALYSIS, Table 2
to START position. Sympton 2.
To restart, press compressor switch from STOP/RESET See OPERATING ANALYSIS, Table 2
to START position. Sympton 2.
Will restart when pressure increases to 20 PSID. See OPERATING ANALYSIS, Table 2
To restart, press compressor switch from STOP/RESET Symptom 4, 5, 6, 7, 9, 10, 11.
to START position.
Will restart when pressure falls to 9 PSIG. See OPERATING ANALYSIS, Table 2
To restart, press compressor switch from STOP/RESET Symptom 1 - High Discharge Pressure.
to START position.
To restart, press compressor switch from STOP/RESET Defective Evap. Pressure Transducer or Leaving
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. Chiller CM-2 or Solid State Starter or Variable Speed
will start automatically. Drive has shut down chiller.
To restart, press compressor switch from STOP/RESET Condenser tubes dirty or scaled or high condenser
to START position. water temperature. See Symptom 1, Table 2.
To restart, press compressor switch from STOP/RESET Dirty oil filter or restricted oil cooler line. Change oil
to START position. filter. See Sympton 9, Table 2.
Optional AUTO Restart Plug Will restart automatically when voltage reaches 8.29VDC. Power Failure.
is installed on Micro Board. An undervoltage circuit on Micro Board monitors the 5VDC
unregulated supply for an undervoltage condition.
Auto restart plug is removed To restart, press compressor switch to STOP/RESET Power Failure.
on Micro Board. position and then to START position.