Troubleshooting by means of the System-OK-LED status
System LED
Device Status
Potential Error Cause
Corrective Action
off (not illuminated) 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
Other LEDs are showing a random
pattern.
The CPU board is faulty.
Send the device to be repaired.
flashing red
The HMI shows an error number.
Fatal system error
Get in contact with the manufacturer.
constant red
The HMI shows an error number.
Fatal system error
Get in contact with the manufacturer.
You have started the device while
pressing the <CTRL> key for
performing a bootloader or firmware
update.
No device error.
Please follow the instructions in the installer`s manual.
flashing green,
switch to constant
green within 30
seconds
No error.
The device is in its start-up phase.
When the System LED switches to
constant green, the protection
functions are active.
No action necessary.
flashing red/ green The device is up and running. The
protection functions are working.
The internal self-supervision module
has detected a serious problem in the
system. The issue will be recorded
within an integrated fault memory.
Please refer to chapter “Self-supervision Messages”.
HighPROTEC Troubleshooting Guide DOK-HB-TSE Rev. B
5
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