York YLUA0248 Series, Installation Operation & Maintenance

Page: 106 / 158

JOHNSON CONTROLS
106
FORM 150.73-NM2
ISSUE DATE: 09/07/2020
SECTION 7 – UNIT CONTROLS
See Service And Troubleshooting sec-
tion for Printer Installation information.
SYSTEM 1 DATA
COMP STATUS 1=OFF 2=OFF 3=OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
SUCTION PRESSURE 66 PSIG
DISCHARGE PRESSURE 219 PSIG
SUCTION TEMPERATURE 52.8 DEGF
LIQUID LINE SOLENOID OFF
HOT GAS BYPASS VALVE OFF
CONDENSER FAN STAGES OFF
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 51 PSIG
DISCHARGE PRESSURE 157 PSIG
SUCTION TEMPERATURE 44.3 DEGF
LIQUID LINE SOLENOID ON
CONDENSER FAN STAGE 3
SYSTEM XXX.X AMPS X.X VOLTS
DAILY SCHEDULE
S M T W T F S *=HOLIDAY
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
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 29 JAN 08
SYS 1 HIGH DSCH PRESS SHUTDOWN
SYS 2 NO FAULTS