135
SECTION 13 - SOLID STATE STARTERS
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
13
valid at the instant of the fault are also sent. Any addi-
tional faults that occur within the 2 second transmission
time are also sent and logged on the HISTORY Screen
under LAST TEN FAULTS. Refer to
Operation Manual
(Form 160.54-O1)
for description of all Cycling and
Safety shutdown messages.
While this data is being sent, LCSSS - SHUTDOWN
- REQUESTING FAULT DATA is displayed on the
System Details line of the OptiView Control Center dis-
play. If fault data is not returned within 2 seconds, the
microboard will continue to send a request at 2 second
intervals until the fault data is returned. If none is re-
turned within 10 consecutive requests, it assumes it is
not forthcoming and it displays LCSSS - STOP CON-
TACTS OPEN on the System Details line of the display.
The chiller can be started if there are no Safety and
Cycling conditions. If the temperature of any of the
SCR modules are greater than 110°F, the LCSSS
cooling pump will run and the chiller will be inhib-
ited from starting until the temperature has decreased
below 109°F. While this Start Inhibit is in effect, LC-
SSS - HIGH TEMPERATURE PHASE X - STOPPED
(where X is phase A, B, or C) is displayed on the Sys-
tem Details line of the display. When the chiller is
started, the OptiView Control Center sends two start
signals simultaneously to the Logic/Trigger Board.
One is transmitted via the serial communications link.
The other is the closure of 1R (K18) Start relay, apply-
ing 115 VAC to Logic/Trigger Board TB1-24. If these
two signals are not received within 5 seconds of one
another, the Logic/Trigger Board initiates a cycling
shutdown and LCSSS - RUN SIGNAL is displayed on
the System Details line of the display.
The Logic/Trigger Board transmits the following pa-
rameters over the serial communications link for dis-
play on the MOTOR Screen:
• Three phase motor current
• Three phase line-to-line motor supply voltage
• Input Power (KW)
• Three phase SCR module temperature
• Starter model designation
The following are the programmable setpoints associated
with the LCSSS. They are programmed on the MOTOR
Screen. See programming instructions in
SYSTEM CALIBRATION, SERVICE SETPOINTS, AND
of this manual.
•
Full Load Amps -
This is the maximum allowed
motor current at which this chiller is permitted to
operate to achieve maximum design capacity. It is
the Full Load Amps (FLA) of the chiller, as listed
on the SALES ORDER Screen. Each starter mod-
el has a permissible range over which this setpoint
can be programmed as follows:
LCSSS MODEL
PERMISSIBLE FLA
7L-46, 58 and 50
35 to 260 Amps
14L-17, 28, 46, 58 and 50
65 to 510 Amps
26L-17, 28, 46, 58 and 50
125 to 850 Amps
33L-17, 28, 46 and 50
215 to 1050 Amps
•
Start Current -
The Logic/Trigger Board will
limit inrush motor current to this value during
starting. The programmed value is sent to the
Logic/Trigger Board over the serial communica-
tions link. This setpoint should be programmed to
(0.45 x motor Delta Locked Rotor Amps) as listed
on the SALES ORDER Screen. Each model start-
er has a permissible range over which this setpoint
can be programmed as follows:
LCSSS MODEL
PERMISSIBLE START
CURRENT RANGE
7L-46, 58 and 50
310 to 700 Amps
14L- 17, 28, 46, 58 and 50
620 to 1400 Amps
26L- 17, 28, 46, 58 and 50
1150 to 2600 Amps
33L-17, 28, 46 and 50
1460 to 3300 Amps
•
Supply Line Voltage Range -
This setpoint is the
line voltage application and establishes the high
and low line voltage shutdown thresholds. Shut-
down and restart thresholds are contained in
Op-
eration Manual (Form 160.54-O1) under the mes-
sages LCSSS - LOW SUPPLY LINE VOLTAGE
and LCSSS - HIGH SUPPLY LINE VOLTAGE.
•
Open SCR Enable/Disable -
This enables or dis-
ables the Open SCR detection Safety protection
performed by the Logic/Trigger Board. This pro-
tection must
never
be disabled unless advised by
the YORK factory.
•
Kilowatt Hours (KWH) Reset -
This allows the
accumulated KWH to be set to a desired starting
value in the event the BRAM has to be field re
-
placed. This must
never
be arbitrarily performed.
To ensure that the chiller is not permitted to run for ex-
tended periods with the supply line voltage outside of
acceptable limits, the Logic/Trigger Board compares
the actual 3-phase line voltage to the thresholds estab-