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SECTION 5 - SERVICE
TABLE 11 - DIAGNOSTIC DISPLAY CODES
LED DISPLAY CODE (NORMAL BOOT UP)
00
CH
AP
∞
LED DISPLAY CODE (OTHER)
01
02
05
F0
F1
F3
F4
FF
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 assure those components are op-
erational.
The sequence of events in the boot-up process are listed
in the Table 11 on Page 202. 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-remov-
able Flash Memory that is soldered to the microboard.
New chillers are supplied programmed with the lat-
est program available at the time of manufacture. The
program version that is currently residing in the mi-
croboard Flash Memory Chip is displayed on the DI-
AGNOSTICS Screen in SERVICE access level.
202
DIP 4 OFF - Booting from internal Flash program
Flash Checksum Test in progress
Application program setup in progress
Application program is running
DIP 4 ON - Booting from SD card [Normal when loading a program]
DIP 4 ON - Booting from USB port
DIP 4 ON - PIC application is being configured
DIP 4 OFF - Boot from internal Flash Failed [Try to reload the program]
DIP 4 ON - Boot from SD card Failed [Bad SD card or Bad microboard]
DIP 4 ON - Microboard Internal error [Bad microboard]
DIP 4 ON - Checksum Failed [Try to reload program, Bad microboard]
DIP 4 ON - Boot from SD card Failed
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
program card part number for YK-EP chillers is 031-
03616-001 and is available 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 ver-
sion. The version is an alpha-numeric code that identi-
fies the chiller model applicability, language 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 language support.
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.
ISSUE DATE: 8/24/2018
DESCRIPTION
JOHNSON CONTROLS
FORM 160.87-OM1
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