343
SECTION 36 - SOFTWARE ENHANCEMENTS
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
36
GENERAL
Beginning January 2004, enhanced software will be
supplied in all new production YK chillers. It is back-
ward compatible to all previous YK chillers. The en-
hancements are outlined below.
The versions and part numbers for 031-01730-000 Mi-
croboards are as follows:
• NEMA 1-4 chillers
C.MLM.01.09.106 (p/n 031-01797-001)
• CE chillers
C.MLM.01.09.207 (p/n 031-01797-002)
The version and part number for 031-02430-000 Mi-
croboards for both NEMA 1-4 and CE chillers is
C.OPT.01.09.301 (p/n 031-02474-001).
OPTISAVE ENERGY ANALYZER FEATURE
This feature reveals the advantage of a compressor
motor VSD. It calculates the amount of energy that
has been saved by having a VSD instead of a constant
speed drive. The savings are determined by calculating
the energy consumption of a constant speed drive and
subtracting the measured energy consumption of the
variable speed drive. The resulting difference is the en-
ergy savings. This data is displayed, but does not affect
chiller operation or performance.
Although this feature is present in this software, it is
not operational until enabled using a special procedure.
Refer to
Service Information Letter SI0068
for a com-
plete description of this feature. It provides all required
installation, enable and setup information.
SURGE PROTECTION
If the chiller is equipped with a compressor motor
VSD:
• The surge shutdown feature, extended run fea-
ture and surge Warning messages will not be
performed unless the VSD output frequency is at
maximum.
If the chiller is equipped with both a VSD and the hot
gas bypass feature:
• The hot gas valve position must be at 100% AND
the VSD output frequency must be at maximum
before the above surge features are performed.
SI0080 - SOFTWARE ENHANCEMENTS EFFECTIVE JANUARY 2004
For all applications, the count Window setpoint default
is now three minutes (was five minutes). The count
limit setpoint default is 15 surges (was four surges).
PRE-ROTATION VANES CALIBRATION
There is now one procedure for all pre-rotation vanes
(PRV) calibrations. This procedure applies to the Com-
pressor Motor VSD, hot gas bypass, variable geometry
diffuser, and any other PRV calibration.
1. Place the COMPRESSOR switch in the STOP-
RESET position (O) and wait until the system
coastdown is complete.
2. At the keypad, login at SERVICE access level.
3. Select the PRE-ROTATION VANES CALI-
BRATE screen from the COMPRESSOR screen.
4. Press the START CALIBRATION key to initiate
the calibration. The CALIBRATION IN PROG-
RESS and PRV OPENING LED will illuminate
and an open signal is applied to the PRV.
After a 60 second delay, the program begins
evaluating the feedback voltage from the PRV
potentiometer. When the feedback voltage stops
increasing and remains stabilized (so that there is
no more than plus or minus 0.25 VDC deviation)
for 25 continuous seconds, the feedback voltage
is logged as the 100% position. A close signal is
then applied to the PRV and illuminates the PRV
CLOSING LED.
After a 10 second delay, the program begins
evaluating the feedback voltage from the PRV
potentiometer. When the feedback voltage stops
decreasing and remains stabilized (so that there is
no more than plus or minus 0.25 VDC deviation)
for 25 continuous seconds, the feedback voltage
is logged as the 0% position. These endpoint volt-
ages are stored in the BRAM as the full open and
full closed positions.
5. If the difference between the endpoint voltages
is greater than 0.5 VDC, PRV CALIBRATION
SUCCESSFUL is displayed. If it is less than 0.5
VDC, PRV CALIBRATION UNSUCCESSFUL
is displayed. Also, if the endpoints are not estab-
lished within 10 minutes, PRV CALIBRATION
UNSUCCESSFUL is displayed.