Viessmann Energy meter - Fault Displays

13
LED LED meaning Remedy
1
Green OFF Immersion heater not connected. Check immersion heater connection, see
output control module installation and
service instructions.
2
Green OFF Immersion heater not connected. Check immersion heater connection, see
output control module installation and
service instructions.
No function
Red Flashes During the initialisation process at the first
start-up:
LED flashes for 20 s.
Wait until initialisation process has been
completed.
ON Error during initialisation process
Possible causes:
■
Electrical connection between energy
meter and output control module is faulty.
■
Electrical connection of current sensors is
faulty.
■
Check all electrical connections.
■
Check orientation of current sensors,
see page 8.
■
Switch power supply OFF and ON
again.
■
Immersion heater could not be switched
on:
–
Electrical connection between output
control module and immersion heater is
faulty.
–
The set DHW temperature has been
reached.
■
Check the electrical connection.
■
Ensure heat transfer.
■
During the initialisation process, the ener-
gy meter establishes the maximum out-
put of the immersion heater. If the maxi-
mum output fluctuates by more than
500 W, the initialisation process was un-
successful.
Restore the energy meter to its delivered
condition, see page 14.
Troubleshooting
Fault displays
5678 581 GB
Service