Trouble shooting:
• No LED is on:
Check power supply and fuse.
• Display shows “Status: overload”:
Check the M-Bus wiring for short circuits and ground loops. Defective slaves can also
produce an overcurrent. The source for the short circuit can be found easier by removing
some bus segments from the M-Bus terminals.
• One or more meters are not detected in automatic search procedure:
Retry automatic search. Check baud rate and address of this meter. You can manually add
the meter to the list of slaves and then perform a single readout of this meter.
• No reply from meter:
Check baudrate and address of this meter. Check the bus extension: The bus voltage must
be >24V at any slave. Temporarily remove other bus segment.
• „Status: Error“:
MR00xDL/FA in waiting status (inactive): Press and C keys simultaneously to view the list
of errors. Please note the error codes and then delete the error codes by pressing the key.
The most important error codes can be decoded using the table in the addendum.
• Wrong Passcode
Please do the following steps, if you have forgotten the passcode:
Do the actions which are described in “Status: Error” and then press the key again.
Please write down the 16 digit string (display config) and send it together with the firmware
version no. and serial no. to INFO@RELAY.DE by email. We will send you a working
passcode.
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