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FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 33 - SYSTEM CALIBRATION, SERVICE SETPOINTS, AND RESET PROCEDURES
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
Medium Voltage Solid State Starter
1. At the keypad, log in at SERVICE access level
using password 1 3 8 0.
2. Select MOTOR Screen.
3. Enter the following setpoints using procedures
below:
Full Load Amps
This is the Full Load Amps (FLA) of the chiller as listed
on the SALES ORDER Screen. The microboard uses
the programmed value to perform Current Limit func-
tions and display compressor motor current in terms of
%FLA.
1. Press FULL LOAD AMPS key.
2. Use numeric keypad keys to enter the correct value.
3. Press ENTER (
) key.
Start Current
The starter will limit compressor motor current to this
value during starting. The correct value is (0.45 x Delta
Locked Rotor Amps), as listed on the SALES ORDER
Screen.
1. Press STARTING CURRENT key.
2. Use numeric keypad keys to enter correct value.
3. Press ENTER (
) key.
COMPRESSOR MOTOR VARIABLE SPEED
DRIVE APPLICATIONS
When the compressor motor is driven by a YORK Vari-
able Speed Drive, there could be a Variable Speed Drive
(VSD) or a Medium Voltage Variable Speed Drive (MV
VSD) applied. Early vintage VSD’s contain an Adaptive
Capacity Control (ACC) Board in the OptiView cabi-
net that interfaces the microboard using YORK Protocol
serial communications. With the later vintage VSD, the
ACC functionality resides in the microboard, the ACC
Board is not present and the VSD Logic Board directly
interfaces the microboard directly using RS-485 Mod-
bus Protocol serial communications. The MV VSD is
also interfaced to the microboard with RS-485 Modbus
for the different pos-
sible configurations before proceeding.
1. At the keypad, log in at SERVICE access level
(unless otherwise noted) using password 1 3 8 0.
2. Enter the following setpoints using the procedures
detailed below.
Motor Drive Type
The Variable Speed Drive type applied must be set as
follows. Select the procedure based on the microboard
that is present.
• Microboard 031-1730-000: Position Program
Jumpers JP37 and JP39 appropriately per
TION 3 - MICROBOARD 031-01730-000
.
• Microboard 031-02430-000/001, 031-03630-001:
1. Chiller must be stopped and RUN switch
must be in Stop-Reset position.
2. Select SETUP Screen.
3. Press CHANGE SETTINGS key.
4. A green box will appear around the first
changeable setpoint. Use ▲▼ keys to place
box around the MOTOR DRIVE TYPE
setpoint.
5. Press
key. A dialog box will appear with
the range of settings. Use ◄ ► keys to select
“VSD-60Hz”, “VSD-50Hz” or “MV VSD”,
as appropriate.
6. Press ENTER (
) key.
Motor Communications Protocol
(Software version C.OPT.01.16.xxx (and later))
Only displayed when Motor Drive Type setpoint above
is selected as “VSD-60Hz” or “VSD-50Hz”. The Ser-
vice technician must enable the appropriate serial com-
munications port for communications to the Variable
Speed Drive (VSD). Entered as “YORK” to enable
COM5 (J15) or Modbus to enable COM2 (J13). Selec-
tion required is based on the hardware and interface
that is present. See
(VSD) to determine which
hardware/interface is present before making selection.
• YORK – Enables COM5 (J15) serial port. Used
when the microboard is interfaced to the Variable
Speed Drive via the ACC Board.
• MODBUS – Enables COM2 (J13) serial port.
Used when the ACC Board is not present and the
microboard is interfaced directly to the Variable
Speed Drive Logic Board. In order to select Mod-
bus, Microboard 031-02430-001 or 031-03630-
001 is required.
