York YVAA, Installation, Operation & Maintenance Instructions Manual, Page: 118 / 178

JOHNSON CONTROLS
118
SECTION 7 - OPERATION
FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
VSD
J2 VSD#1 and J1 VSD#2 connections headers for
RS-485 communications to the Variable Speed
Drive(s).
VSD RX and VSD TX LEDs illuminate to indicate
the VSD communications activity. U18 is the VSD
Port RS-485 Driver Chip. It is socketed to allow field
replacement.
PROGRAM UPDATE
The Application software and BACnet database are
stored in the IPU II Flash memory. Copying a new
version of software and/or database from the SD Flash
card changes the IPU II Flash. The new application
software must be named SOFTWARE.ELF. The new
BACnet database must be named DATABASE.BIN.
These files must be located in the root directory of
the SD Flash card. The software can be updated with-
out updating the database. In this case, the existing
database will be used with the new software. The data-
base cannot be updated without updating the software.
Be sure to allow enough time for the softare to update
properly.
To update the program:
1. Copy the new software in to the root directory of
the SD card.
2. Rename this new program file SOFTWARE.ELF.
3. Turn the Unit Switch OFF.
4. Insert the SD card in to the SD card Reader/Writer
slot.
5. Press the OPTIONS key and then press the Down
Arrow key until the following message is displayed.
FLASH CARD UPDATE DISABLED.
6. Press the RIGHT ARROW key to change the
DISABLED to ENABLED
7. Press the ENTER key to start the update. Once
pressed the message :
FLASH CARD UPDATING PLEASE WAIT...
is displayed until the update has been completed.
The keypad and display will not respond during
the flash update. After the software is finished up-
dating, the controller will automatically reboot.
8. If an error occurs during the update, an error mes-
sage will be displayed where XX is the Error
Code. See Table 16 on Page 118 for error code
definitions.
9. After the update is completed and the controller
reboots, the keypad and display will return to full-
functionality. The SD card may be left in place for
datalogging or else replaced with another SD card
dedicated for datalogging.
10. To remove the SD card, GENTLY press the card
inslightly then release the pressure. The card will
pop out slightly to allow removal.
Never reset or power down the chiller
until the update is finished. Interrupting
the flash update procedure can corrupt
the program file and render the control
board inoperative.
TABLE 16 - FLASH CARD UPDATE ERROR XXXXX
FLASH CARD
UPDATE
ERROR CODE
DEFINITION
0 Okay
10 Flash card not found.
11 SOFTWARE.ELF file not found
14 SOFTWARE.ELF file larger than expected.
15
RAM to IPU Flash transfer of DATABASE.
ELF failed.
16
RAM to IPU Flash transfer of SOFTWARE.
ELF failed.
17
Could not allocate sufficient memory to
read or write file.
99 Internal software error.
DATA LOGGING
A 2GB SD card (p/n 031-03466-000) may be inserted
into the 03478 IPUII SD card slot to record the chiller
operating parameters at 5 second intervals. The data is
stored in a folder named RMYYYYMM where YYYY
is the year and MM is the month the data was recorded.
The controller creates a file for each day within this
folder with the format YYYYMMDD.csv where DD
equals the day of the month in addition to the YY to
the year and MM to the month fields. For example: The
folder named RM201503 is a folder created in March of
2015. Within this folder would be a file for each day of
that month that the datalogging is running. If a review
of the History Report shows that an abnormal event oc-
curred on March 3rd at 2:05pm, the user can import
the 20150303.csv file into Excel and look at the system
parameter details leading up to the 2:05pm event.