What To Do If No Display Indication; O C5 Power-Off" Appears On The Display; Message Symbol "«", "O" Or "Æ" Flashes On The Display - Viessmann VITOCAL 350-A Operating Instructions Manual

What to do if...
No display indication
Cause
Power failure/fault in the power supply.
The MCB has responded.
Appliance was switched off at the system
ON/OFF switch.

"O C5 power-OFF" appears on the display

Cause
This is not a fault.
This text is displayed during a power
interruption by your power supply utility
(see also page 8).
Message symbol "«", "O" or "Æ" flashes on the display
Cause
Message on the heat pump
50
Remedy
Appliance starts automatically as soon as
power is restored or the fault has been
remedied.
Notify your local contractor.
Start appliance (see page 15).
Remedy
The heat pump restarts automatically in
accordance with the selected operating
mode as soon as the power supply utility
restores the power supply.
Remedy
Scan the type of message (see page 46)
and notify your local heating contractor.