370
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 36 - SOFTWARE ENHANCEMENTS
JCI COMPANY CONFIDENTIAL
JOHNSON CONTROLS
FAULTS
If the VSD – HIGH PHASE (X) INSTANTANEOUS
FAULT CYCLING fault occurs three times in 10 min-
utes, the third shutdown becomes a safety fault.
Warnings
The following warning was added:
Warning – Harmonic Filter – Not Running.
This
warning is set when all of the following are true for 20
continuous seconds:
• Chiller is running.
• Filter is enabled.
• Filter present status is true.
• Run time is greater than 20 seconds.
• Filter operating mode is stopped.
This warning is released when the chiller
is stopped, but will be displayed until
manually cleared using the WARNING
RESET key when logged in at Operator
(or higher) Access Level.
Serial Communications
When VSD – 60Hz or 50Hz is selected for the MOTOR
DRIVE TYPE setpoint on the SETPOINTS screen, the
microboard will poll on COM 2 alternating between
Modbus ASCII Vyper/D Mod and Modbus RTU Rap-
tyr protocols until one responds or until an initializa-
tion fault occurs. Once a valid response is received
from either VSD type, the microboard will remember
the response, even after a power failure, which allows
the correct screens to be displayed after a power fail-
ure, without repeating the poll interrogation. As long
as the motor drive type is not changed, once the mi-
croboard determines which VSD type is connected, it
will not poll for the other. Only after a the motor drive
type setpoint changes, will the two types alternate to
determine the connected type.
Screens
Temperature Differential (LCHLT – Setpoint) is now
displayed on the surge map screen.
SI0252 - SOFTWARE ENHANCEMENTS (VER 23) EFFECTIVE MAY 2011 (CONT'D)
HISTORY SCREEN
The following enhancements were made:
• The VGD pressure voltage is now displayed as
discharge pressure.
• The ACC surge count is now displayed when MO-
TOR DRIVE TYPE setpoint is set to any VSD.
• The VGD limit switch is now displayed as VGD
closed limit switch.
TRENDING
New Slots
The following enhancements were made:
• Surge Avoidance Surge Count is Slot No. 8238.
• ACC Surge Count is Slot No. 2849.
PUMP CONTROL
In previous software versions, the chilled water pump
contacts and the condenser water pump contacts open
on loss of water shutdowns. The pump control contacts
will now remain closed on these shutdowns as follows:
• While the chiller is shutdown on leaving chilled
liquid – flow switch open cycling shutdown, the
chilled water pump contacts (TB2-44/45) remain
closed until the chiller is given a stop command or
has another fault.
•
While the chiller is shutdown on condenser – flow
switch open cycling shutdown, the condenser
pump contacts (TB2-150/151) remain closed until
the chiller is given a stop command or has another
fault.
In previous software versions, on those shutdowns
where the chilled water pump contacts (TB2-44/45)
remained closed during shutdown, the contacts would
open at the beginning of system pre-lube and reclose
13 seconds into pre-lube on a chiller restart, which al-
lowed for the transducer auto-zeroing that occurred be-
tween 10-13 seconds of the pre-lube. In this software
version, on those chiller shutdowns where the contacts
remain closed during shutdown, when a chiller restart
occurs, the contacts remain closed into and throughout
the pre-lube period and the transducer auto-zeroing is
not performed (the values from the last auto-zeroing
are used).
