Section 3 - Microboard - York MAXE OPTIVIEW YK Service Instructions Manual

The Microboard contains the operating software (Pro-
gram), microprocessor (Micro), and supporting cir cuits
for the Micro.
The Program is a set of instructions to control the
chill er, the display and peripheral devices. It also
con tains the Safety and Cycling shutdown thresholds
(non change able) and Display messages and screens.
It is stored in a memory device called a fl ash memory
card. This is a type of non-volatile memory that can be
read from or written to, but requires the locations to be
erased before they are writ ten to. With the exception of
a write/read se quence that occurs during the Boot-up
process ex plained below, this device is used primarily
as read-only in this application. A write protect switch
is lo cat ed on the left edge of the card as shown in Fig.
8. It must be placed in the "Write Enabled" position in
or der to allow suc cess ful Boot-up. The card is located
in sock et location U46 (Ref. Fig. 7). It connects to the
Board via an Elas to mer ic connector that is a silicon rub-
ber strip em bed ded with silver conductors. The Card
can be re moved from its socket by using the thumb to
press down on the sock et's plastic tension spring. The
card is in stalled by inserting it into the socket/holder and
pressing on the surface of the Card until it snaps into
place. The Mem o ry card is a replaceable com po nent.
Refer to YORK Re new al Parts List Form 160.54-RP1.
The ver sion of the Memory card is an alpha-nu mer ic
code that rep re sents the application and revision level.
The ver sion is printed on a label ad hered to the memory
card's sur face. The version code is as follows:
YORK INTERNATIONAL
SECTION 3
MICROBOARD
(REFER TO FIG. 7 - 12)
C.MLM.nn.nn.nnn
* Refer to YORK Renewal Parts List 160.54-RP1 for available
languages.
1 = Supplied in new NEMA 1-4 OptiView Control Centers but
can be retrofi t to any OptiView Con trol Center.
2 = Supplied in new CE (European Community) OptiView Con-
trol Centers but can be retrofit to any OptiView Con trol
Center.
There are sev er al Flash Memory Cards available. The
dif fer ence between them is the different lan guag es that
can be displayed on the Display Screens. Lan guage se-
lection is performed on the USER Screen following
instructions in Operations Man u al 160.54-O1. Not all
languages are available. Refer to Re new al Parts List
160.54-RP1 for list of available Flash Memory Cards and
display lan guag es. IM POR TANT! – Not all ver sions
of Flash Memory Cards are compatible with re vi sion
"E" (and later) Microboards or all BIOS Eproms. If an
incompatible version is used, the initialization (boot-up)
process will not complete and the chiller will not run!
Refer to Renewal Parts List 160.54-RP1 and "Ser vice
Replacement" paragraph in this sec tion.
FORM 160.54-M1(503)
Language Package Revision Level
(00, 01, etc.)
Language Package*
(0=English only, 1=NEMA 1-4, 2=CE)
Controls Revision Level (00, 01, etc.)
Chiller Type
all compressors after 8/02
(01=YK (
"P" compressors before
03=YS, 04=YK (
8/02
), 05=YR)
MaxE™ Chiller
Commercial Chiller
3
),02=YT,
19