JOHNSON CONTROLS
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SECTION 7 - OPERATION
Form 201.28-NM1.1
Issue date: 08/06/2021
Invalid number of compressors warning
The INVALID NUMBER OF COMPRESSORS
SELECTED warning will occur after the VSD has
been initialized, if no jumpers are installed or if more
than 1 jumper is installed, ”Number of Compressors
Select” message is displayed. The following warning
message will be displayed indefinitely.
UNIT WARNING:
INVALID NUMBER OF COMPRESSORS SELECTED
To clear this warning, both the control panel and VSD
control voltage must be turned OFF and the jumpers
properly installed in the VSD wiring harness.
These jumpers are factory installed in the
wire harness plug and should not require
changes.
Invalid serial number warning
If the INVALID SERIAL NUMBER message appears,
immediately contact Johnson Controls Product Techni-
cal Support. The appearance of this message may mean
the chiller has lost important factory programmed in-
formation. The serial number can be entered using the
SERVICE key.
UNIT WARNING: INVALID SERIAL NUMBER
ENTER UNIT SERIAL NUMBER
This status message can be bypassed to view addition-
al messages under the STATUS key by pressing the
STATUS key repeatedly to scroll through as many as
three STATUS messages that could possibly be dis-
played at any time.
Follow all JCI Safety Directives when in-
serting or removing the SD card since the
card is located inside the control cabinet.
To start the Data Logging, insert the SD card into the
SD card slot on the 03478 IPUII board. The label on
the SD card should be facing outwards.
Once the SD card is inserted and the unit is powered
up, press the OPTIONS key. Then press the Down Ar-
row key to advance to the DATA LOG TO FLASH-
CARD selection. Next press the Right Arrow key to
select ON then press the ENTER key to start the Data
Log. A 2GB SD card will hold about 8 months worth
of data. A smaller card may be used that will hold less
data but should be tested for compatibility. The con-
troller operating system does not support SD cards
larger than 2GB. When the SD card becomes full, the
oldest date file is automatically deleted and a new day
log file is written in its place.
To stop the data logging and retrieve the SD card, press
the OPTION key and then the Down Arrow key to dis-
play the DATA LOG TO FLASHCARD option and
then use the Right Arrow key to select OFF then press
the ENTER key.
Again, follow the JCI Safety Directives to stop the
chiller, power off the unit and open the control cabinet
door to retrieve the SD card.
Once inside the control cabinet, lightly press in on the
SD card and then release the pressure. The SD card
should pop out slightly to allow removal. You may
then copy the files to a PC for analysis or email the file
to someone. The files are saved as a CSV format which
can be read by Excel. Below is a sample of some of the
data imported from a YCIV Chiller.
Once the file is read in to Excel, you can hide unrelated
columns or plot desired parameters to analyze the data.
