50
FORM 160.54-M1
ISSUE DATE: 10/25/2019
SECTION 4 - MICROBOARD 031-02430-000 AND 031-02430-001
JCI COMPANY CONFIDENTIAL JOHNSON CONTROLS
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 program in the
BIOS EPROM configures the microprocessor and re-
lated components and performs testing of certain com-
ponents to ensure those components are operational.
The sequence of events in the boot-up process are list-
ed in the Table 4 on page 50. The progress and pass/
fail status of each step is displayed on the microboard
7-segment LED Display (U22). Due to the speed at
which the boot-up proceeds, not all steps will be vis-
ible during the process. Not all pass/fail status is dis-
played 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 a non-re-
movable Flash Memory Chip (U35) that is soldered to
the microboard. New chillers are supplied programmed
with the latest program available at the time of manu-
facture. 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 downloading
the latest version from a Program card using the proce-
dure 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 2-1/8 x 3-3/8 x 1/8 in. plastic card weighing
1.1 oz (See Figure 18 on page 67). It is a portable
memory storage device that is programmed with the
chiller operating program. The program card part num-
ber for YK chillers is 031-02474-001 and is available
TABLE 4 - DIAGNOSTIC DISPLAY CODES
TEST
PASS
CODE
FAIL ACTION
DISPLAY ON
WHITE SCREEN
First init table complete 00 watchdog will cause reboot No
SDRAM Regs. Congured 01 watchdog will cause reboot No
Switch to Protected Mode 02 watchdog will cause reboot No
Jump to 32-bit code 03 watchdog will cause reboot No
Low memory test start 04 watchdog will cause reboot No
Low memory test complete P1 “F1” on display and halt No
Full memory test complete P2 “F2” on display and halt No
FPGA conguration 05 “P2” will remain on LED display No
Display Cont. Congured 06 “05” will remain on LED display No
Flash Checksum Test P3 “F3” will remain on LED display Yes
BRAM test P4 “F4” will remain on LED display Yes
Flash Query Test “passed” “failed” and halt Yes
Flash checksum “passed” “failed”, halt and display code = F3 Yes
BRAM Test “passed” “failed” and halt Yes
MISCELLANEOUS CODES
LED DISPLAY CODE DESCRIPTION
FF FPGA Conguration Failed, trying again
CH Flash Checksum Test in progress
AP Application setup in progress
CRITICAL CODES
LED DISPLAY CODE DESCRIPTION
Ni NMI handler invoked (should never occur)
[ ] GPF has occurred (should never occur)
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