York YCAV0157 Installation Operation & Maintenance page 263

The data sections are listed below:
· Software Versions
· Analog Inputs
· Digital Inputs
· Digital Outputs
· Analog Outputs
· VSD Logic Digital Output
The software version of the chiller Micro Control Board
and the VSD micro are viewable in the first data sec-
tion.
SERVICE SOFTWARE VERSIONS
CONTROL = C.AXX.ZZ.YY
XX, YY, and ZZ will be filled in with alphanumeric
characters.
The second data section displays the Analog Inputs (AI).
Displays for 3 and 4 compressor chillers are skipped if
the unit does not have those systems. These messages
will only be displayed in English. The voltage displayed
is referenced to common (return, ground) in the system.
J12-3 can also be used as common, as well as chassis
ground, or the common terminal point on the Chiller
Control Board. See the wiring diagrams.
SERVICE AI J17-11 REMOTE TEMP RESET
X.X VDC
SERVICE AI J17-12 REMOTE CURRENT LIMIT
X.X VDC
SERVICE AI J17-13 REMOTE SOUND LIMIT
X.X VDC
The Remote Temp Reset, Remote Current Limit Reset,
and Remote Sound Limit inputs have onboard voltage
dividers, if the jumper is set for a voltage input. This
will cause the voltage read on the display to be less than
the voltage on the board header inputs between TB1-17
and 18, TB1-19 and 20, or TB1-40 and 41). To correct
for this when measuring voltage at the remote device
supplying voltage to the board header while trouble-
shooting, use the following calculation:
Voltage = 10 x ADC volts / 4.5
JOHNSON CONTROLS
SERVICE KEY (CON'T)
VSD = C.VXX.ZZ.YY
= XXX.X %
= XXX.X %
= XXX.X %
If the input is programmed for a current input, the
voltage read by the MUX is displayed. If the input is
disabled under the OPTIONS key, the voltage display
will display "DISABLED".
The analog inputs display will continue to sequence as
follows. The inputs indicate voltages read between the
input terminal to the Chiller Logic Board and the plug
GND or Drain.
SERVICE AI J17-14 SPARE ANALOG 1
X.X VDC
SERVICE AI J17-15 SPARE ANALOG 2
X.X VDC
SERVICE AI J18-7 LEAVING LIQUID TEMP
X.X VDC
SERVICE AI J18-8 RETURN LIQUID TEMP
X.X VDC
SERVICE AI J18-9 AMBIENT AIR TEMP
X.X VDC
SERVICE AI J19-1 SYS1 MOTOR TEMP T1
X.X VDC
SERVICE AI J19-2 SYS1 MOTOR TEMP T2
X.X VDC
SERVICE AI J19-3 SYS1 MOTOR TEMP T3
X.X VDC
SERVICE AI J19-6 SYS2 MOTOR TEMP T1
X.X VDC
SERVICE AI J19-7 SYS2 MOTOR TEMP T2
X.X VDC
SERVICE AI J19-8 SYS2 MOTOR TEMP T3
X.X VDC
SERVICE AI J20-1 SYS3 MOTOR TEMP T1
X.X VDC
SERVICE AI J20-2 SYS3 MOTOR TEMP T2
X.X VDC
FORM 201.21-NM1 (1223)
8
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
= XXX.X °F
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