York YK-EP Operation And Maintenance Manual page 240

Table 209: Test points and LED indicators
Voltage
+5VDC
+12VDC
-12VDC
+24VDC
+3.3VDC
VCC
+5VA
Battery
Boot-up program
The Boot-up Program is stored in Flash memory. It may be updated along with a new version of the
operating program by inserting an SD card containing the new program into the SD card slot on the
03630 board, setting DIP Switch SW1 position 4 to ON and then applying power to the chiller. The
Boot-up Program version is displayed on the DIAGNOSTICS Screen in SERVICE access level.
Table 210: 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.
240
Test point
TP3
TP4
TP33
TP35
TP2
TP15
TP10
n/a
Description
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
Voltage range
+4.92 to +5.28VDC
+11.58 to +12.5VDC
-11.5 to -12.5VDC
+22.4 to +26.7VDC
+3.25 to +3.43VDC
+4.92 to +5.28VDC
+4.95 to +5.05
+2.95 to +3.45
Fuse LED
F1 (5A) CR56
F2 (5A) CR57
F3 (5A) CR58
F4 (4A) CR59
n/a CR62
n/a n/a
n/a CR61
n/a n/a
YK-EP Style B Centrifugal Chiller