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SECTION 5 - MICROBOARD 031-03630-001
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
5
Microboard 031-03630-001 is supplied as replacement
part after June 2015. This board is backwards compat-
ible to YK chillers presently using the 031-01730-000,
031-02430-000 or 031-02430-001 Microboards. A new
power supply harness p/n 571-06765-271 is required to
connect the power supply to the improved power con-
nection on the new microboard.
When replacing a 031-01730-000, 031-02430-000 or
031-02430-001 microboard with a 031-03630-001 mi-
croboard, all setpoints configurations and sales order
data will need to be entered manually.
1.
Record the setpoints and configuration settings
and print the Setpoints and Sales Order reports.
2. Retrieve the sales order data using the YMSO util-
ity program.
3. Shut down the chiller and then power off the unit
following all JCI Safety Requirements.
4. Remove all of the wiring harness plugs from the
old microboard and label any loose communica-
tion wires that are currently connected to J2, J13
or J12.
5. Loosen the ground screw that holds the power
supply harness green ground wire and remove the
power supply harness.
6. Remove the 10 microboard mounting screws and
remove the old microboard.
7. Set the Jumpers JP2 through JP12 and JP21
through JP25 and SW1 switch on the 03630 to the
same positions as those on the 02430 board. A de-
scription of these jumpers are found later in this
document.
8. Install the new 03630 microboard using the screws
previously removed.
9. Connect the power supply harness P2 to J2 on the
power supply with the green and yellow ground
wire oriented closest to the front of the panel. At-
tach the ground lug under the ground screw.
10. Connect power supply harness P30 to J30 on the
panel wiring harness, J32 to P32 on the panel wir-
ing harness, P1 to J1 on the 03630 and P3 to J3 on
the 03630.
11. The VSOP J20 3 pin plug has been replaced by
a removable screw terminal plug. The wires will
need to be cut from the 02430 P20 plug. Strip the
3 wires 1/8” and insert them in the new 03630 J20
plug. Note that pin 1 on the 03630 board is oppo-
site of where it was on the 02430 board. It is now
on the left side of J20. Connect the White wire to
terminal 1 of J20, the Red to terminal 2 and the
Black to terminal 3.
12. If an ACC board is installed, the wires on the
02430 P15 plug will also need to be cut and
stripped and inserted into the 03630 J15 COM5A
removable screw terminal plug. Connect the Red
wire to terminal 1, the White wire to terminal 2
and the Black wire to terminal 3.
13. If an ACC is not installed then if the starter is a
VSD, MVVSD or MVSSS with Modbus com-
munication, connect the Green wire to J13-2 (-),
the White wire to J13-3 (+) and the Black wire to
J13-4 (Gnd).
14. If an SC-EQ or E-Link is installed, connect the
wires to 03630 J2. Connect the Red to terminal 6
GRX, Black to terminal 6 GTX.
15. If Expansion LTC I/O or a Motor Monitoring
board is installed, connect the communication
COM3 to the 03630 COM3 J12 Red wire to ter-
minal 5 + and the Black wire to terminal 4 -.
16. Connect all of the remaining plugs to their appro-
priate connections on the microboard. All plugs
are marked the same designation on the 03630 as
they are on the 01730 and 02430.
17. Power up the panel with the rocker switch in the
OFF position.
18. Enter the Sales Order data either manually or
using the YMSO utility program then enter the
setpoint and configuration data.
Program Card Service Replacement
Since one YK SD Program card can be used to re-
program other YK chillers, it is not necessary for an
individual Service technician to have more than one
YK Program card. Program cards can be shared among
Service technicians where appropriate.
However, since chiller operating programs are occa-
sionally revised, the Service technician could have a
Program card that does not contain the latest program.
Program cards (031-03601-001) for YK chillers are
available from the Baltimore Parts Distribution Center
(PDC). The card received from the PDC is programmed
with the latest version of the chiller operating program.
Program cards can be re-programmed with the latest
program version.
