99 Chapter 9: Troubleshooting
GPM400 LED indications
Color Operation Causes
Normal operation
Green Flashing 500 / 500 ms • Normal operation (Heartbeat)
Green Flashing 750 / 250ms • Standby mode
Warnings and Errors
Off Off < 2 minutes
Off for > 2 minutes
•Startup
•No power
•
Amber On steady • Power on
• Lamp test
Amber Flashing x 1 • No link between processors (network fault)
Amber Flashing x 2 • No network / cable unplugged
Amber Flashing x 3 • Over temperature warning
Amber/Green Alternating 750/250 ms • Bootloader awaiting to be upgraded or downloading code
Amber/Red Alternating 750/250 ms • DOBII Download. This condition remains until a valid application is available
from Flash
Red Flashing x 1 • Fan fault
Red Flashing x 3 • Over temperature error
Red Flashing x 4 • Flash write error
Red Flashing x 5 • No application programmed
Red Flashing x 8
(May be followed by Flashing amber)
• Hardware fault
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