JOHNSON CONTROLS
242
FORM 201.23-NM2
ISSUE DATE: 3/9/2015
SECTION 8 - MICROPANEL
If a low battery is detected, it should be replaced as
soon as possible. The programmed values will all be
lost and the unit will be prevented from running on the
next power interruption. The RTC/Battery is located on
the Chiller Logic Board shown below:
MADE IN THE USA
YORK
RTC/
BATTERY
LD10590
Invalid Number of Compressors Warning
The INVALID NUMBER OF COMPRESSORS SE-
LECTED Warning will occur after the VSD has been
initialized, if no ”Number of Compressors Select”
jumpers are installed or if more than 1 jumper is in-
stalled. The following warning message will be dis-
played indefinitely.
UNIT WARNING:
INVALID NUMBER OF COMPRESSSORS 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 (see Page
210 for more details on jumper installation).
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
Additionally, when this appears, an Optimized IPLV
chiller will only run in Standard IPLV control mode.
Optimized IPLV cannot be enabled unless the serial
number is programmed into the unit using the special
password supplied by Johnson Controls Product Tech-
nical Support. Once the password is entered, a second
password will be needed to activate the optimized
IPLV control (see Page 292).
This status message can be bypassed to view additional
messages under the STATUS key by pressing the STA-
TUS key repeatedly to scroll through as many as three
STATUS messages that could possibly be displayed at
any time.
Optimized Efficiency Disabled
If the OPTIMIZED EFFICIENCY DISABLED mes-
sage appears, immediately contact Johnson Controls
Product Technical Support or Johnson Controls ES
Commercial. The appearance of this message means an
optimized chiller is programmed for standard control.
UNIT WARNING: OPTIMIZED EFFICIENCY
DISABLED - CONTACT YORK REPRESENATIVE
Optimized IPLV cannot be enabled unless a special
password is entered. Once the password is entered and
the option is enabled using the SERVICE key, the mes-
sage will disappear (see Page 292).
This status message can be bypassed to view additional
messages under the STATUS key by pressing the STA-
TUS key repeatedly to scroll through as many as three
STATUS messages that could possibly be displayed at
any time.
Summary of Contents for YCIV0157
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