Parker PAC, Installation Manual, Page: 179 / 197

System Status LEDs
Run/Stop LED
During the Boot process:
Off (Error LED is Off as well) The BIOS has not yet loaded.
White (Along with Error LED turning Red) The BIOS is loading.
Flashing Red (Along with Error LED turning off)
The BIOS has handed control to the Bootloader on
the SD card.
Flashing Yellow (Error LED is Off)
The Bootloader has finished loading the Runtime
image into RAM and the Operating System is
starting.
Flashing White (Error LED is Off)
The Operating System is loaded and the Runtime
System is starting.
During Runtime:
Red No program is running.
Green Programs are running.
Flashing White No program loaded on the PAC
Error LED
During the Boot process (Run/Stop LED is White):
Off
A bootable device has been detected and control is
handed off to the Bootloader on the SD card.
On A bootable device has not yet been detected.
During Runtime:
Off The runtime system has not detected an error.
On An error has been detected by the runtime system.
PAC Error LED
The PAC Error LED may turn solid red due to any of the following conditions listed below. To determine
the exact failure, refer to the log files that are accessible with the Configuration Tool in the About Tab (see
page 43, About the PAC). The two files that contain the error logs are: PAC Runtime Config Log File and
Retentive Memory Log File.
If the Error LED turns on, the follow these steps to try and resolve the issue:

Power Cycle the PAC

Reload the project to the PAC

Restore the SD using the Flashback Utility (see page 160)

Contact Technical Support with specific information about the error
Here is a list of possible recoverable errors:

Memory allocation failures