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SECTION 5 - SERVICE
2. Disabled – Set to this position when not equipped
with a PRV potentiometer. If equipped with a
VSD, MVVSD or the Hot gas bypass or Variable
Geometry Diffuser is enabled, this setpoint is au-
tomatically enabled and cannot be set to disabled.
• Motor Monitoring
The Motor Monitoring feature to be enabled or
disabled. Motor Monitoring can not be used with
the 371-02514-000 since the Motor Monitoring
and the Frick Analog board use different proto-
cols.
• Heat Recovery
Allows the Heat Recovery feature to be enabled
or disabled.
• Head Pressure Control
Allows the Head Pressure feature to be enabled
or disabled.
Microboard Service Replacement
If the microboard is replaced within the warranty peri-
od, the defective board must be returned to JCI YORK
per the warranty return procedure. Use the return in-
structions and return address label provided with the
replacement board.
To order a replacement Microboard for a YK-EP
Chiller, order part number 331-03630-615. This part
number provides an 031-03630-007 Microboard and
an SD program card with the latest YK-EP program.
This SD (031-03605-002) card must be loaded in to
the microboard.
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.
214
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 description 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. (If
replacing a 02430).
10. Connect power supply harness P30 to J30 on the
panel wiring harness, J32 to P32 on the panel wir-
ing harness, P1 to J2 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 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.
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
JOHNSON CONTROLS
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