60
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 4 - MICROBOARD 031-02430-000 AND 031-02430-001
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
Starter applications, used when the microboard
is interfaced to the LCSSS Logic/Trigger Board
TB2.
2.
Modbus
– Enables COM 2 (J13) serial port.
Microboard (P/N 031-02430-001) is required.
Program Jumpers JP14 (BRAM size) and JP17
(COM 2 Serial Mode) must be configured per
SECTION 4 - MICROBOARD 031-02430-000
.
• VSD Applications – Used when the ACC
Board is not present and the microboard is
interfaced directly to VSD Logic Board 031-
02506 (J16). Microboard must be equipped
with 128K BRAM (031-02565-000).
• Style B Solid State Starter Applications –
Used when the microboard is interfaced to
the LCSSS Logic/Trigger Board 031-02505
(J14). Microboard can be equipped with ei-
ther 32K BRAM (031-02431-000) or 128K
BRAM (031-02565-000).
Motor Node ID
(VSD applications – software version
C.OPT.01.16.307 or later). (Style B Liquid Cooled
Solid State Starter applications – software version
C.OPT.01.18.307 or later).
Only displayed when Modbus is selected for the Mo-
tor Communications Protocol setpoint above. Allows
the Service technician to enter the Modbus Address of
the VSD logic board or Style B LCSSS Logic/Trigger
Board. The Motor Node ID setpoint must match the
Modbus Address assigned to these boards. Whenever
the microboard is reading or writing to these devices,
it transmits the address entered as the Motor Node ID
setpoint. The device will only respond if the transmit-
ted address matches the address assigned to the device.
The chiller must be stopped with the START-RUN-
STOP/RESET switch in the STOP/RESET position to
change this setpoint.
• VSD Applications – Enter 1 for the Motor Node
ID setpoint. Then set the Modbus Address of VSD
Logic Board 031-02506 to “1” by setting Switch
SW3 position 1 to ON with all other positions OFF.
• Style B Solid State Starter Applications – Enter 1
for the Motor Node ID setpoint. Then set the Mod-
bus Address of the Logic/Trigger Board 031-02505
to 1 by setting Switch SW1 Position 1 to ON with
all other positions OFF.
Coastdown Time
(software version C.OPT.01.16.307
and later) – Only appears when STANDARD is select-
ed for the Coastdown setpoint. Sets the duration of the
coastdown period. The time is programmable over the
range of 240 (default) to 900 seconds or 150 (default)
to 900 seconds as determined by the selection made for
the Chiller Style/Compressor setpoint on the OPERA-
TIONS Screen. Refer to the Chiller Style/Compressor
setpoint.
Condenser Temperature Range
(software version
C.OPT.01.19.307 and later) – Special order chillers
that operate at higher than standard condenser temper-
atures require higher condenser high pressure warning
and safety thresholds. This setpoint allows the software
to be used in either standard or high temperature ap-
plications. This setpoint is set at the factory at time
of manufacture and requires an ADMIN password to
change it. It is only visible when set to Extended. The
selections are:
1.
Standard
– Uses standard high pressure warning
and safety shutdown thresholds as follows:
• “Warning – High Pressure Limit” – Maxi-
mum allowable value is 162.5 psig
• “Condenser – High Pressure” – Trip/reset
threshold is 180/120 psig
• “Condenser – High Pressure – Stopped” –
Trip/reset threshold 160 psig.
2.
Extended
– Uses higher high pressure warning
and safety shutdown thresholds as follows:
• Warning – High Pressure Limit” – Maximum
allowable value is 193.0 psig
• “Condenser – High Pressure” – Trip/reset
threshold is 200/140 psig
• “Condenser – High Pressure – Stopped” –
Trip/reset threshold is 170 psig
PRV Position
(software version C.OPT.01.21.307 and
later) – New production chillers after June 2009 can be
equipped with an optional Pre-rotation Vanes potenti-
ometer, regardless of other options. This setpoint al-
lows the software to be used in all YK chillers, whether
equipped with the potentiometer or not. The PRV po-
sition will be shown on respective screens when En-
abled; not shown when Disabled.
