Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual page 119

FORM 160.54-M1
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 connect-
ed 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
opening of the VSD Stop Contacts via its interface to
the OptiView™ Control Center's I/O Board input J2-
1. This notifies 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 request 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 be-
gins sending 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 un-
til fault data is returned. If none is returned within 10
requests, it assumes 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
JOHNSON CONTROLS
SECTION 13 - ADAPTIVE CAPACITY CONTROL BOARD
• 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.
13
119