York YLUA0078 Installation Operation & Maintenance page 112

SECTION 7 – UNIT CONTROLS
SYSTEM 1 DATA
COMP STATUS 1=OFF 2=OFF 3=OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
SUCTION PRESSURE
DISCHARGE PRESSURE
SUCTION TEMPERATURE
LIQUID LINE SOLENOID
HOT GAS BYPASS VALVE
CONDENSER FAN STAGES
SYSTEM XXX.X AMPS X.X VOLTS
SYSTEM 2 DATA
COMP STATUS 1=OFF, 2=OFF, 3=OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
SUCTION PRESSURE
DISCHARGE PRESSURE
SUCTION TEMPERATURE
LIQUID LINE SOLENOID
CONDENSER FAN STAGE
SYSTEM XXX.X AMPS
DAILY SCHEDULE
S M T W T F S
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
See Service And Troubleshooting section
for Printer Installation information.
112
66 psig
219 psig
52.8 DEGF
OFF
OFF
OFF
51 psig
157 psig
44.3 DEGF
ON
3
X.X VOLTS
*=HOLIDAY
History Printout
Pressing the PRINT key and then the HISTORY key
allows the operator to obtain a printout of informa-
tion relating to the last 6 Safety Shutdowns which oc-
curred. 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 backup is
built into the circuit board) or manual resetting of a
fault lock-out.
When the HISTORY key is pressed, a printout is trans-
mitted 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 condi-
tions 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 similar to the operational data
printout shown in the previous section. The differences
are in the header and the schedule information. The
daily schedule is not printed in a history print.
One example history buffer printout is shown follow-
ing. The data part of the printout will be exactly the
same as the operational data print so it is not repeated
here. The difference is that the Daily Schedule is not
printed in the history print and the header will be as
follows.
YORK INTERNATIONAL CORPORATION
MILLENNIUM CONDENSING UNIT
SAFETY SHUTDOWN NUMBER 1
SHUTDOWN @ 3:56PM
SYS 1 HIGH DSCH PRESS SHUTDOWN
SYS 2
FORM 150.73-NM1
ISSUE DATE: 09/04/2020
29 JAN 08
NO FAULTS
JOHNSON CONTROLS