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Appendix
Appendix
A Troubleshooting
Symptom
Product disconnected
from the power supply
No hot water; the wa-
ter remains cold
The water does not
become hot enough
B Technical data
Technical data – General
Temperature setting
Heating system heat
generator
44
Possible cause
Measure
▶
Building's fuse has
been tripped
▶
The safety switch in
the product has been
triggered
▶
Product is disconnec-
ted from the power
supply
1. If you do not measure any power, proceed
▶
The measured value
on the heating block
(connection 1 against
connection 4) is
greater than 200 Ω
▶
No relay clicking on
the electronics when
the draw-off starts
▶
Other cause
▶
The target temperat-
ure or volume flow are
not set correctly
▶
The measured value
on the heating block
(connection 1 against
connection 4) is
greater than 200 Ω
▶
The relay does not
click on the electronics
when there is more
than 4 l/min
▶
Other cause
VED E 18/8 INT VED E 21/8 INT VED E 24/8 INT VED E
Between
Between
30 and 55 °C,
30 and 55 °C,
to any value,
to any value,
electronically
electronically
regulated
regulated
Bare wire heat-
Bare wire heat-
ing coil
ing coil
Installation instructions electronicVED 0020288451_00
Replace the electronics.
Replace the electronics.
Check L1, L2 and L3 against PE (230 V)
and L1, L2 and L3 (400 V).
as described under the fault "Product dis-
connected from the power supply".
Replace the heating block.
Replace the impeller.
Replace the electronics.
Set the target temperature to approx. 40 °C
and the volume flow to approx. 5 l/min.
Replace the heating block.
Replace the impeller.
Replace the electronics.
Between
30 and 55 °C,
to any value,
electronically
regulated
Bare wire heat-
ing coil
27/8 INT
Between
30 and 55 °C,
to any value,
electronically
regulated
Bare wire heat-
ing coil
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