YORK INTERNATIONAL
62
History
The HISTORY key allows the operator to remotely ob-
tain a printout of information relating to the last 3 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 (long term internal memory
battery back-up is built into the circuit board) or manual
resetting of a fault lock-out.
When the HISTORY key is pressed, a Print-out is trans-
mitted of all system Operating conditions which were
stored at the instant the fault occurred for each of the
3 SAFETY SHUTDOWN BUFFERS. There is one buffer
(storage area) for data related to each of the last 3 safety
shutdowns.
The print out will begin with the most recent fault which
occurred. The most recent fault will always be stored
as SAFETY SHUTDOWN NO. 1 (See print-out Fig. 30).
Identically formatted fault information will then be printed
for SAFETY SHUTDOWN NO. 2 and SAFETY SHUT-
DOWN NO. 3.
Information contained in the SAFETY SHUTDOWN
Buffers is very important when attempting to trouble-
shoot 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 (See Fig. 30).
NOTE: As mentioned earlier, delays may be experi-
enced due to the Master micro interrupting com-
munications with the printer to communicate
with the Slave micro. These interruptions may
make the HISTORY print-out time extremely
long with a Weigh-Tronix printer.
YORK INTERNATIONAL CORPORATION
RECIPROCATING WATER CHILLERS
SYSTEM STATUS
5:24AM 1/02/95
SYS 1
COMPRESSOR RUNNING
SYS 2
COMPRESSOR RUNNING
SYS 3
COMPRESSOR RUNNING
SYS 4
ANTI -RECYCYLE TIMER 119 SEC
RETURN WATER TEMP 1
82.8 DEGF
RETURN WATER TEMP 2
83.6 DEGF
LEAVING WATER TEMP 1
60.1 DEGF
LEAVING WATER TEMP 2
73.5 DEGF
MIXED WATER TEMP
49.8 DEGF
LOW WATER CUTOUT
36.0 DEGF
SETPOINT TEMP
44.0 DEGF
OUTSIDE AIR TEMP
66.6 DEGF
LOW AMBIENT CUTOUT
25.0 DEGF
LOW PRESSURE CUTOUT
44 PSIG
LEAD SYSTEM
SYS 1
CONTROL TYPE
LCHWT
COOLING RANGE
44.0 TO 46.0 DEGF
SYSTEM 1 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
30 %FLA
SUCTION PRESSURE
46 PSIG
DISCHARGE PRESSURE
312 PSIG
OIL PRESSURE
92
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
4
FORWARD FANS
2
REVERSE FANS
OFF
HOT GAS BYPASS VALVE
OFF
SYSTEM 2 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
65 %FLA
SUCTION PRESSURE
68 PSIG
DISCHARGE PRESSURE
334 PSIG
OIL PRESSURE
72
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
3
FORWARD FANS
2
REVERSE FANS
OFF
HOT GAS BYPASS VALVE
OFF
SYSTEM 3 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
22 %FLA
SUCTION PRESSURE
59 PSIG
DISCHARGE PRESSURE
291 PSIG
OIL PRESSURE
95
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
4
FORWARD FANS
2
REVERSE FANS
OFF
SYSTEM 4 DATA
COMPRESSOR STATUS
OFF
MOTOR AMPS
30 %FLA
SUCTION PRESSURE
62 PSIG
DISCHARGE PRESSURE
327 PSIG
OIL PRESSURE
83
PSID
LIQUID LINE SOLENOID
OFF
RUN PERMISSIVE
ON
STAGES OF LOADING
1
FORWARD FANS
OFF
REVERSE FANS
OFF
S M T W T F S
* = HOLIDAY
SUN
START=00:00AM
STOP=00:00AM
MON
START=00:00AM
STOP=00:00AM
TUE
START=00:00AM
STOP=00:00AM
WED
START=00:00AM
STOP=00:00AM
THU
START=00:00AM
STOP=00:00AM
FRI
START=00:00AM
STOP=00:00AM
SAT
START=00:00AM
STOP=00:00AM
HOL
START=00:00AM
STOP=00:00AM
FIG. 29
OPERATING DATA PRINT OUT
HISTORY
