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SECTION 4 - MICROBOARD 031-02430-000 AND 031-02430-001
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
4
from the Baltimore Parts Distribution Center (PDC).
There is a Program card for each chiller type (YT, YK,
YS, YR, YD, etc) and each has a unique part number.
A label affixed to the Program card contains the part
number and version. The version is an alpha-numeric
code that identifies the chiller model applicability, lan-
guage package, language package revision level and
chiller operating program revision level.
The Program card is applicable to both NEMA and
CE applications. The Program card for YK chillers has
English, Simplified and Traditional Chinese, French,
Portuguese, Spanish, Italian, German and Hungarian
languages.
The program version that is currently residing in the
microboard Flash Memory Chip is displayed as the
“Controls” Software Version on the DIAGNOSTICS
Screen in SERVICE access level.
The Program card obtained from the PDC is pro-
grammed with the latest version of the chiller operating
program. Program cards can be reprogrammed.
A Program card for a particular chiller type can be
used to re-program other chillers of the same type.
For example, it is not necessary to have more than one
YK Program card. A single YK card can be carried to
different locations to re-program other YK OptiView
Control Centers.
A Write Protect Switch on the edge of the Program
card prevents inadvertent writing to the Card during
program downloading.
Handling precautions for the Program card include:
• Do not allow dirt to enter connector
• Carry in protective sleeve
• Storage temperature range is -20 to 65°C (-4 to
149°F)
A label adhered to the Program card contains the version
and YORK part number. The version is an alphanumeric
code that identifies the chiller model applicability, lan-
guage package, language revision level and chiller con-
trol revision level. The version is as follows:
C.OPT . nn.nn .nnn
Language Package revision level
(00,01,etc)
Language Package (0=English
only, 1=NEMA, 2=CE, 3=NEMA/
CE)
Controls Revision Level (00, 01,
02, etc)
Chiller Model (01=OM, 02=YT,
03=YS, 05=YR, 11=YD)
OptiView Control Center
Commercial Chiller
The Program card is inserted into connector U33 to
download a program. Refer to instructions under Ser-
vice Replacement below.
Program Download Connector U33
A Program card is inserted into connector U33 to
download a program. A protective cover prevents dirt
from entering this connector.
IMPORTANT!
The protective cover
must be in place at all times when not
performing a program download. If dirt
accumulates inside this connector, re-
programming will not be successful.
Parallel Port Connector
Parallel port connector J4 is for future use. It is pres-
ently not supported.
BRAM (U38)
The BRAM (battery backed random access memo-
ry) memory device contains a battery that preserves
the stored data during power failures. All of the pro-
grammed Setpoints, Sales Order Data, History Data,
Time of Day and Calendar Data is stored here. The
YORK Part number is printed on a label adhered to
the surface of the BRAM. It is available from the Bal-
timore Parts Distribution Center as a replacement part.
The part number of the BRAM (U38) in the 031-02430–
000 board is 031-02431-000 and its size is 32KB. It
is installed in a 28-pin socket. Program Jumper JP14
is a non-removable (soldered) wire jumper that con-
nects DC power to the appropriate pin on the BRAM
for 32KB operation.