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SECTION 36 - SOFTWARE ENHANCEMENTS
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
36
SI0164 - SOFTWARE ENHANCEMENTS EFFECTIVE APRIL 2007
GENERAL
Beginning April 2007, enhanced software will be sup-
plied in new production YK chillers and replacement
Microboard kit 331-02430-601. This software is back-
ward compatible to all previous YK chillers equipped
with microboard (P/N 031-02430-000 or 031-02430-
001). The enhancements are listed below.
The version and part number for both NEMA 1-4 and
CE chillers is C.OPT.01.16.xxx (031-02474-001).
SELECTABLE COASTDOWN TIME SETPOINT
To ensure bearing lubrication until the compressor mo-
tor stops rotating at chiller shutdown, the oil pump runs
for the duration of the coastdown period. Larger mo-
tors require a longer coastdown time than the standard
150 seconds. Therefore, when STANDARD is selected
for the coastdown setpoint on the SETUP screen, new
setpoint coastdown time allows the service technician
(in SERVICE access level) to enter a coastdown time
appropriate for the motor applied. The time is program-
mable over a range based on the selection made for
the chiller style/compressor setpoint on the OPERA-
TIONS screen.
• For Style F/J7 and G/K6-K7, the range is 240
(Default) to 900 seconds.
• For all others, the range is 150 (default) to 900
seconds.
CHILLED AND CONDENSER WATER –
FLOW SWITCH SHUTDOWNS
To prevent nuisance flow switch shutdowns due to mo-
mentary flow interruption or rapid water temperature
changes that can affect Thermal Flow Sensors, the fol-
lowing extended flow switch delays are implemented
for both Analog and Digital flow sensor selections.
Leaving Chilled Liquid – Flow Switch Open –
The
chilled water flow switch has remained open for five
continuous seconds (two continuous seconds with soft-
ware version C.OPT.01.15A.xxx (and earlier)) while
the chiller is running or failed to close during the pre-
lube period. The chiller will automatically restart when
the flow switch closes.
Condenser – Flow Switch Open –
The condenser
flow switch has remained open for 30 continuous sec-
onds (two continuous seconds with software version
C.OPT.01.15A.xxx (and earlier)) while the chiller is
running. This check is bypassed for the first 30 seconds
of system run.
CURRENT IMBALANCE MESSAGES
The safety shutdown messages MOTOR OR START-
ER – CURRENT IMBALANCE and LCSSS – OUT-
PUT CURRENT IMBALANCE have been combined
into one message MOTOR OR STARTER – OUTPUT
CURRENT IMBALANCE for both VSDs and Style B
solid state starter chillers.
NEW TREND/CUSTOM VIEW SLOT NUMBERS
The following slot numbers were added:
2849 ACC Surge Count
2850 ACC Surge Type
2857 ACC Surge Point Count
2858 ACC Surge Delta P/P
2859 ACC Surge Output Frequency
2860 ACC Surge PRV Position
TREND SCALING ERROR CORRECTION
In previous software versions, the software automati-
cally rescaled the Y-Axis range (on certain parameters)
after the operator had selected the range, which could
result in reducing the overall range. The Y-Axis is now
scaled to accommodate the highest value selected.
VARIABLE SPEED DRIVE –
INVALID CURRENT LIMIT MESSAGE
In previous software versions, when operating at less
than full speed (60Hz/50Hz) and pressing the FIXED
key on the VSD TUNING screen, the message MO-
TOR – HIGH CURRENT LIMIT was displayed until
the drive reached full speed. While this message was
displayed, the PRVs are inhibited from opening.
In this version, LOAD CONTROL MODE is displayed
instead of MOTOR – HIGH CURRENT LIMIT under
this condition.
