2
System LED Signals
Off (Not Illuminated)
Description
Information
Corrective Action
The System LED is off (not illuminated), and the other LEDs
are also off.
Either no supply voltage or the power supply is faulty.
Please check the supply voltage. If it is OK, send the device to
be repaired.
Undefined, Not Flashing
Description
Information
Corrective Action
The System LED is undefined and not flashing, and the
other LEDs are showing a random pattern.
The CPU board is faulty.
Send the device to be repaired.
Flashing Red
Description
Information
Corrective Action
The System LED is flashing red and the HMI shows an error
number.
Fatal system error.
Get in contact with our service-team.
Constantly Red
Description
Information
Corrective Action
The System LED is constantly red and the HMI shows an
error number.
Fatal system error.
Get in contact with our service-team.
You have started the device while pressing the »CTRL« key.
This is not a device error but the normal activity for
performing a bootloader or firmware update.
Please follow the instructions for installing an update.
Flashing Green
Description
Information
Corrective Action
The System LED is flashing green, and after some time it
changes to constantly green.
This is not a device error but the normal start-up
phase. As soon as the System LED changes to
constantly green, the protection functions are active.
The LED should have changed to constantly green after approx.
30 seconds.
9
Troubleshooting Guide
HPT-3.6-EN-TSG
2 System LED Signals
