"External Hook-Up" Is Displayed; "External Program" Is Displayed; "Controls Locked Out" Is Displayed - Viessmann Vitotronic 200 Operating Instructions Manual

What to do if...
" " is flashing and "Note" is displayed
Cause
Reference to a particular event or operating state of the
heat pump, heating system or connected ventilation
unit
" " is flashing and "Warning" is displayed
Cause
Warning due to a particular event or operating state of
the heat pump, heating system or connected ventilation
unit
" " is flashing and "Fault" is displayed
Cause
Fault at the heat pump, heating system or connected
ventilation unit
"Power-OFF C5" is displayed
Cause
This message is displayed whilst the power supply is
blocked by the power supply utility.

"External hook-up" is displayed

Cause
The operating program set at the heat pump control
unit has been switched over by an external device, e.g.
EA1 extension.

"External program" is displayed

Cause
The Vitocom communication interface has changed the
operating program set at the heat pump control unit.

"Controls locked out" is displayed

Cause
Control of the heat pump is blocked.
60
Remedy
Proceed as described on page 54.
Remedy
Proceed as described on page 54.
Remedy
Proceed as described on page 54.
Remedy
No action required.
■
The heat pump restarts automatically with the selec-
■
ted operating program as soon as the power supply
utility restores the power supply.
Remedy
No action required
Remedy
You can change the operating program.
Remedy
Your contractor can lift this block.