Fault Displays - Viessmann Energy meter Installation And Service Instructions For Contractors

Fault displays

LED LED meaning
1
Green OFF Immersion heater not connected.
2
Green OFF Immersion heater not connected.
No function
Red Flashes During the initialisation process at the first
start-up:
LED flashes for 20 s.
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.
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.
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.
Troubleshooting
Remedy
Check immersion heater connection, see
output control module installation and
service instructions.
Check immersion heater connection, see
output control module installation and
service instructions.
Wait until initialisation process has been
completed.
Check all electrical connections.
■
Check orientation of current sensors,
■
see page 8.
Switch power supply OFF and ON
■
again.
Check the electrical connection.
■
Ensure heat transfer.
■
Restore the energy meter to its delivered
condition, see page 14.
13