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SECTION 14 - ADAPTIVE CAPACITY CONTROL BOARD
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS JCI COMPANY CONFIDENTIAL
14
is displayed. The VSD Logic and Harmonic Filter
Boards send the data listed below to the ACC Board
and the ACC Board adds its data to it and returns all the
data to the microboard in one response. This continues
until the VSD Logic or Harmonic Filter Boards detect
a fault condition.
As stated above, if communications are lost with the
VSD Logic Board, a cycling shutdown is performed
and VSD – SERIAL COMMUNICATIONS is dis-
played. However, if communications are lost with the
Harmonic Filter Logic Board, no shutdown is per-
formed, only WARNING – HARMONIC FILTER –
DATA LOSS is displayed.
When a VSD fault condition is detected, the VSD Logic
Board opens its VSD Stop Contacts that are connected
in series with the OptiView Control Center’s 1R (K18)
RUN RELAY coil. This interrupts the circuit to 1R
causing it to de-energize, removing the run signal to the
VSD. Simultaneously, the microboard reads the open-
ing of the VSD Stop Contacts via its interface to the Op-
tiView Control Center’s I/O Board input J2-1. This noti-
fies the microboard that a VSD shutdown has occurred.
The microboard requests the cause of the shutdown by
sending a Fault Data Request command. While this re-
quest is being processed, the microboard displays VSD
SHUTDOWN – REQUESTING FAULT DATA. When
the cause of the shutdown is received, the microboard
displays a message describing the shutdown (Refer to
OptiView Control Panel – Operation (Form 160.54-
O1) for complete listing of messages) and begins send-
ing normal Status Data Request commands. If the fault
data is not returned to the microboard within 2 seconds,
it sends the command every 2 seconds until fault data
is returned. If none is returned within 10 requests, it as-
sumes it is not forthcoming and displays VSD – STOP
CONTACTS OPEN.
The following VSD status data is transmitted from the
VSD Logic Board to the ACC Board for transfer to the
microboard for display:
• Output Frequency
• Output Voltage
• Output Current - three phase
• Input Power KW
• KWH
• 100% Job FLA
• DC Link Voltage
• DC Link Current
• Internal Ambient Temperature
• Inverter Heat sink Temperature – phase A, B, and C
• Converter Heat sink Temperature
• Pre-charge Relay energized/de-energized
• SCR Gate Drivers enabled/disabled
• Water (cooling) Pump ON/OFF
• VSD running/stopped
• VSD Software Version
• Motor HP
The following Harmonic Filter status data is transmit-
ted from the Harmonic Filter Logic Board to the ACC
Board for transfer to the microboard for display:
• Input KVA
• Total Power Factor
• Filter DC Link Voltage
• Input Voltage- phase A, B and C
• Input Voltage THD – phase A, B and C
• Input Peak Voltage – phase A, B and C
• Input Current – phase A, B and C
• Input Current TDD – phase A, B and C
• Filter Current – phase A, B and C
• Filter Heat sink Temperature
• Filter Operation- running/stopped
• Filter Pre-charge Relay – energized/de-energized
• Filter Supply Relay - energized/de-energized
• Input Phase Rotation – ABC/CBA
• Harmonic Filter – present/not present
The following ACC status data is transmitted from the
ACC Board to the microboard for display.
• Delta P/P (head pressure)
• Pre-rotation Vanes position
• Surge count
The compressor motor speed can be controlled either
manually in Manual Mode or automatically in Auto
Mode.
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