74
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 5 - MICROBOARD 031-03630-001
JCI COMPANY CONFIDENTIAL JOHNSON CONTROLS
TABLE 8 - DIAGNOSTIC DISPLAY CODES
LED DISPLAY CODE (NORMAL BOOT UP) DESCRIPTION
00 DIP 4 OFF - Booting from internal Flash program
CH Flash Checksum Test in progress
AP Application program setup in progress
∞ Application program is running
LED DISPLAY CODE (OTHER)
01 DIP 4 ON - Booting from SD card [Normal when loading a program]
02 DIP 4 ON - Booting from USB port
05 DIP 4 ON - PIC application is being congured
F0 DIP 4 OFF - Boot from internal Flash Failed [Try to reload the program]
F1 DIP 4 ON - Boot from SD card Failed [Bad SD card or Bad microboard]
F3 DIP 4 ON - Microboard Internal error [Bad Microboard]
F4 DIP 4 ON - Checksum Failed [Try to reload program, Bad microboard]
FF DIP 4 ON - Boot from SD card Failed
NOTE: If the display stops at a 01 display, this may be an indication that the SD card reader is defective. If the display stops at the YORK logo
with a white screen, this indicates that the board has no program to boot from.
When power is first applied to the OptiView Control
Center, a white screen is displayed while the boot-up is
performed. During the boot-up, the Boot-up program
in the Flash Memory configures the microprocessor
and related components and performs testing of cer-
tain components to ensure that those components are
operational.
The sequence of events in the boot-up process are list-
ed in the Table 8 on page 74. The progress and pass/
fail status of each step is displayed on the microboard
7-segment LED Display (U25 and U26). Due to the
speed at which the boot-up proceeds, not all steps will
be visible during the process. Not all pass/fail status is
displayed on the white screen.
CHILLER OPERATING PROGRAM
The Chiller Operating Program is a set of instructions
to control the chiller. It contains the Safety and Cycling
shutdown thresholds (non-changeable) and display
screen messages and graphics.
The chiller operating program is stored in non-
removable Flash Memory that is soldered to the mi-
croboard. New chillers are supplied programmed with
the latest program available at the time of manufac-
ture. The program version that is currently residing in
the microboard Flash Memory Chip is displayed on
the DIAGNOSTICS Screen in SERVICE access level.
The on-board program can be upgraded by download-
ing the latest version from a Program card using the
procedure in the Service Replacement section of this
manual.
Program Card
The on-board program can be upgraded by download-
ing the latest program version from a program card.
This is a SD format card which is 1-5/16" X 1". It is
a portable Flash memory storage device that is pro-
grammed with the chiller operating program. The pro-
gram card part number for YK chillers is 031-03601-
001 and is available from the Baltimore
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