50
Cause
Remedy
Control unit incorrectly adjusted
Check and correct settings if required:
■ The heating circuit must be switched
ON (see page 17)
■ Room temperature (see page 17)
■ Time (see page 38)
■ Boiler heating characteristics (see
page 39)
Control unit fault or outside temperature
sensor/boiler water temperature sensor
faulty:
"Fault"
is displayed and the red fault
indicator flashes (see page 47)
Check the type of fault (see page 48) and
notify your local heating contractor.
In conjunction with the mixer circuit: Mixer
motor faulty
Unlock motor lever
A
and manually
adjust mixer lever
B
(e.g. to "5").
Contact your local heating contractor.
There is no hot water
Cause
Remedy
Heating system in
"Standby"
ON indicator (green) flashes
or
Heating system is OFF,
ON indicator (green) is OFF
■ Press
f
(see page 11).
■ Switch ON the power supply, e.g. at a
separate MCB/fuse or a main isolator
(outside of the boiler room).
■ Check the MCB/fuse in the power
distribution board (main domestic
MCB/fuse).
Control unit incorrectly adjusted
Check and correct settings if required:
■ DHW heating must be switched ON
(see page 27)
■ DHW temperature (see page 28)
■ Time (see page 38)
What to do if...
Rooms are too hot
5592 598 GB
