15
English
6. Fault-finding - user
The heating system in the DHB does not
come on, despite the hot water tap being
opened fully.
The flow volume required to turn on the
heating system has not been attained.
– Clean and/or descale.
Differential switch/flow regulator (MRS
switching system) does not come on,
despite the hot water tap being opened
fully.
The flow volume required to turn on the
heating system has not been attained.
– Clean the filter intake after unblocking the
cold water pipe.
No hot water, despite the fact that the diffe-
rential switch can be heard switching on.
– The safety pressure limiter (AD 3) has
switched the device off for safety reasons
(pressure peak in the water installation
> 12 bar).
– Eliminate the cause of the fault (e.g.
defective pressure spray), press blue
button on the safety pressure limiter
(11 a), but only with the tap open and the
device free of pressure.
– Remove the cover. Move the toothed bar
into the middle position and refit the
cover.
Rotate the shower comfort switch and
power selector switch to the left and right
stops (inner setting lever engages) and
bring it into the basic setting.
– Shower comfort switch in wrong position.
– Dirt contamination or lime scale on the
percolators in the fittings or the shower
heads.
– Move the shower comfort switch to the
latching position
.
– Replace heating system.– Heating system defective.
– Dirt filter (in
) blocked.
– Toothed bar (16) not engaged.
Fault Cause Rectification
7. Fault-finding - qualified installer
Fault Cause Rectification
To Next Page
Loading...
