History Print-out
Pressing the 'PRINT' key and then the 'HISTORY' key
allows the operator to obtain a printout of information
relating to the last 6 Safety Shutdowns which occurred.
The information is stored at the instant of the fault,
regardless of whether the fault caused a lockout to
occur. The information is also not affected by power
failures or manual resetting of a fault lock-out.
When the 'HISTORY' key is pressed, a printout is
transmitted of all system operating conditions which
were stored at the "instant the fault occurred" for each of
the 6 Safety Shutdowns buffers. The printout will begin
with the most recent fault which occurred. The most
recent fault will always be stored as Safety Shutdown
No. 1. Identically formatted fault information will then be
printed for the remaining safety shutdowns.
Information contained in the Safety Shutdown buffers is
very important when attempting to troubleshoot a
system problem. This data reflects the system
conditions at the instant the fault occurred and often
reveals other system conditions which actually caused
the safety threshold to be exceeded.
The history printout is identical to the operational data
printout with the exception of the header and the
schedule information which is not printed. An example
of a history buffer header printout is shown opposite.
1-23
Form 201.26.OI1(11/09)
YORK INTERNATIONAL CORPORATION
MILLENNIUM LIQUID CHILLER
SAFETY SHUTDOWN NUMBER 1
SHUTDOWN @ 8:46AM 11 APR 08
SYS 1 LOW SUCTION PRESS SHUTDOWN
SYS 2 NO FAULTS
OPTIONS
CHILLED LIQUID WATER
LOCAL/REMOTE MODE REMOTE
LEAD/LAG CONTROL AUTOMATIC
POWER FAIL RESTART MANUAL
EXPANSION VALVE THERMOSTATIC
REMOTE TEMP RESET 0 TO 10 V
YORK HYDRO KIT PUMPS = 1
HOT GAS BYPASS TYPE NONE
PROGRAM VALUES
DSCH PRESS CUTOUT 38.6 BARG
SUCT PRESS CUTOUT 5.59 BARG
LOW AMBIENT CUTOUT -17.8 DEGC
LEAVING LIQUID CUTOUT 3.0 DEGC
ANTI RECYCLE TIME 600 SECS
FAN CONTROL ON PRESS 25.1 BARG
FAN DIFF OFF PRESS 4.1 BARG
NUMBER OF COMPRESSORS 6
SYS1 NUMBER OF FANS 4
SYS2 NUMBER OF FANS 4
REFRIGERANT TYPE R-410A
REMOTE UNIT ID PROGRAMMED 0
RATE SENSITIVITY 1.7 DEGC/MIN
RATE CONTROL RANGE TMP 6.1 DEGC
UNIT DATA
RETURN LIQUID TEMP 11.2 DEGC
LEAVING LIQUID TEMP 7.6 DEGC
COOLING RANGE 6.1 +/- 1.1 DEGC
REMOTE SETPOINT 6.1 DEGC
AMBIENT AIR TEMP 11.2 DEGC
LEAD SYSTEM SYS 1
EVAPORATOR PUMP ON
EVAPORATOR HEATER OFF
ACTIVE REMOTE CONTROL TEMP
EVAP PUMP TOTAL RUN HOURS 81
SOFTWARE VERSION C.M17.16.02
SYSTEM 1 DATA
COMP STATUS 1=ON 2=ON 3=ON
RUN TIME 0- 0- 2-59 D-H-M-S
SUCTION PRESSURE 5.24 BARG
DISCHARGE PRESSURE 28.7 BARG
LIQUID LINE SOLENOID ON
CONDENSER FAN STAGE LO 4
SYSTEM 2 DATA
COMP STATUS 1=OFF 2=OFF 3=OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
SUCTION PRESSURE 7.45 BARG
DISCHARGE PRESSURE 20.8 BARG
LIQUID LINE SOLENOID OFF
CONDENSER FAN STAGE OFF
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