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FORM 160.54-M1
ISSUE DATE: 10/25/2019
SI0201 - SOFTWARE ENHANCEMENTS (VER 19) EFFECTIVE OCTOBER 2008 (CONT'D)
Surge Protection Screen
The CLEAR SURGE COUNT key was removed in
the previous software version, but it was re-instated in
this version. This key clears the surge avoidance surge
count of the surge protection feature using an ADMIN
password. If equipped with a liquid cooled solid state
or electromechanical starter, these are the total surges
detected. If equipped with a VSD (YORK or Modbus
Protocol configuration) or MV VSD, these are the total
surges detected while the drive was running at maxi-
mum frequency.
The surge detected LED is replaced by a surge avoid-
ance surge detected LED. It illuminates momentarily
when a surge is detected by the surge protection fea-
ture. If equipped with a VSD (YORK or Modbus pro-
tocol configuration) or MV VSD, this feature only
detects surges that occur while the drive is running at
maximum frequency..
An ACC surge detected LED was added to this screen
when in Modbus protocol configuration as shown in
OptiView Control Panel – Operation (Form 160.54-
O1) FIGURE 36. It illuminates momentarily when
a surge is detected by the ACC function in the mi-
croboard while the drive is running at less than maxi-
mum frequency.
The surge avoidance surge count is the total surges ac-
cumulated by the surge protection feature. If the unit
is equipped with a liquid cooled solid state or elec-
tromechanical starter, it is the total surges detected.
If equipped with a VSD (YORK or Modbus protocol
configuration) or MV VSD, it is only the surges detect-
ed while the drive is running at maximum frequency.
The SURGE SENSITIVITY key allows the service
technician to adjust the sensitivity of the surge detec-
tion of the surge protection feature (Surge Avoidance
Surge Detection). Programmable over the range of 0.3
(default) to 1.3. Smaller values increase the sensitivity.
If equipped with a liquid cooled solid state or electro-
mechanical starter, these are the total surges detected
by this feature. If equipped with a VSD (YORK or
Modbus protocol configuration) or MV VSD, these are
the surges that are detected while the drive is running
at maximum frequency.
JOHNSON CONTROLS
Trending
In previous software versions, the evaporator and con-
denser small temperature difference were both labeled
small temperature difference. In this version, they are
labeled as evaporator small temperature difference and
condenser small temperature difference.
There are a maximum of 20 divisions on the Y-Axis,
regardless of access level. In previous software ver-
sions, there were a maximum of 23 in service mode,
and sometimes 20 divisions in view mode.
Italian Language Corrections
The Italian translations of the following messages were
corrected in this software version:
• Condenser-Pressure Transducer Out of Range
• VSD-Low Converter Heat sink Temperature
• Control Panel-Power Failure
• Refrigerant Level Control Screen-Set Zone
• Setup Screen-Change Settings
• History Screen Vane Motor Switch Open
• Slots Screen Small Temperature Difference
• History Screen-Leaving Chilled Liquid – Flow
Switch Open
ACC Corrections/Enhancements
Frequency Command - In previous software versions,
there were certain conditions (such as current limit) un-
der which an incorrect frequency command was sent to
the VSD, which was corrected in this version.
Frequency Command Increase - To ensure that VSD or
MV VSD frequency increases do not cause excessive
motor current resulting in overload shutdowns, fre-
quency increase limitations were imposed based upon
how close the actual motor current is to the chiller full
load amps.
In automatic frequency control mode, anytime the mi-
croboard ACC function increases the VSD or MV VSD
output frequency, the frequency increase is limited by
the motor current as follows:
JCI COMPANY CONFIDENTIAL
SECTION 36 - SOFTWARE ENHANCEMENTS
36
359
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