York OPTIVIEW YK, Service Instructions Manual

Page: 133 / 390

133
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS JCI COMPANY CONFIDENTIAL
13
SOLID STATE STARTERS
The OptiView Control Center will accommodate sev-
eral different Solid State Starters. Later vintage chill-
ers are equipped with either the Medium Voltage Solid
State Starter (MV SSS) or the Style B Liquid Cooled
Solid State Starter (LCSSS). The MV SSS commu-
nicates with the microboard using RS-485 serial data
with Modbus protocol. The Style B LCSSS contains
an integrated Logic/Trigger Board located in the starter
cabinet. This board communicates with the microboard
using the following serial communications:
• Early vintage boards use an opto-coupled inter-
face with YORK protocol.
• Later vintage boards (after mid 2008) use an RS-
485 interface with Modbus protocol.
The Style A LCSSS was in production before the Style
B LCSSS. With the Style A LCSSS, a Trigger Board
resides inside the starter cabinet and a separate Logic
Board is located inside the OptiView cabinet. This ver-
sion communicates with the microboard via a multi-
plexed data interface.
If equipped with Microboard 031-01730-000, Pro-
gram Jumper JP39 must be positioned to invoke ap-
propriate Microboard operation for the starter applied.
If equipped with Microboard 031-02430-000/001 or
031-03630-001, the starter selection is performed on
the SETUP Screen (See
SECTION 33 - SYSTEM CALI-
BRATION, SERVICE SETPOINTS, AND RESET PRO-
CEDURES .
MEDIUM VOLTAGE SOLID STATE STARTER
The Medium Voltage Solid State Starter (MV SSS) com-
municates with the microboard J13 COM 2 port with RS-
485 serial data using Modbus protocol. This communica-
tion link transfers start/stop commands to the starter and
receives status and operation data from the starter. A hard-
wired 115 VAC start signal is also applied to the starter via
relay 1R (K18) contact closure. A Starter Initiated STOP
relay, located in the starter, opens its contacts whenever
the starter initiates a shutdown. The communications link
and relay contact interface operate in the same way as de-
scribed below for the Style B LCSSS.
Microboard 031-02430-001, equipped with the 128K
BRAM and software C.OPT.01.15.xxx (or later) is re-
quired for this application. Microboard Program Jump-
ers JP14 and JP17 must be positioned appropriately.
See SECTION 4 - MICROBOARD 031-02430-000
AND 031-02430-001
of this manual. On the SETUP
Screen “MVSSS” must be selected for the Motor Drive
Type setpoint.
The 031-03630-001 microboard COM 2 is designed as
a RS-485 port so no jumper settings are needed.
The MV SSS MOTOR Screen contains information per-
tinent to the starter. A complete description, theory and
operation of this starter are contained in Medium Voltage
Solid State Starter – Service (Form 160.00-M5).
Style B Serial Interface LCSSS
A complete description, theory of operation and trou-
bleshooting instructions of this LCSSS are contained
in Solid State Starter (Mod B) – Operation and Main-
tenance (Form 160.00-O2) . The following describes
the interface and interaction of the LCSSS with the
OptiView Control Center.
As shown in
Figure 57 on page 137
, the LCSSS con-
tains a single Logic/Trigger printed circuit board. This
board performs the following functions:
• Generates the SCR trigger pulses.
• Receives start/stop commands from the microboard.
• Transmits status and fault data to the microboard.
• Generates all LCSSS initiated Safety and Cycling
shutdowns.
The Logic/Trigger Board is powered by +24 VDC
from the OptiView Control Center Power Supply. The
OptiView Control Center Microboard (J15) communi-
cates with this board via a 1200 baud 0 to +5 VDC se-
rial data communications link. If this communications
link does not operate properly, correct Microboard J15
serial port operation can be verified using the Serial
Inputs and Outputs diagnostic procedure in
SECTION
34 - DIAGNOSTICS AND TROUBLESHOOTING of
this manual. The STOP relay contacts on the Logic/
Trigger Board ensure that a positive shutdown occurs
on all LCSSS initiated shutdowns.
After power has been applied to the system, the
microboard will attempt to establish communications
with the Logic/Trigger Board. If unsuccessful within 10
attempts, the microboard initiates a cycling shutdown
and displays LCSSS INITIALIZATION FAILED on
SECTION 13 - SOLID STATE STARTERS