Regudis W-HTE
Troubleshooting
8. Troubleshooting
8.1 Troubleshooting table
MALFUNCTION
CAUSE
REMEDY
No heating of the potable water
(only cold water at the draw-off
points).
The volume flow sensor is
contaminated or defective.
Clean the volume flow sensor (see
paragraph 8.4 on page 40). If this does
not solve the problem, replace the volume
flow sensor.
The actuator with integrated potable
water temperature control is not in
operation (de-energised).
Check the power supply to the actuator and
restore the power supply if necessary.
There is an air pocket in the heating
circuit.
Vent the heating circuit (see paragraph 7.1
on page 32).
The filter insert in the primary supply
is clogged.
Clean or replace the filter insert (see
paragraph 8.5 on page 42).
The heating system has a
malfunction.
Remedy the malfunction.
The hot water temperature drops
at the draw off point(s).
The heating water temperature is too
low.
Increase the heating water temperature in
the buffer storage cylinder. If necessary,
check the output of the heat generator.
The storage cylinder capacity is not
sufficient.
Check the system design and increase the
storage cylinder capacity if necessary.
During tapping, the hot water
temperatures fluctuate.
The control parameters do not match
the conditions present in the object.
Teach in the actuator (see paragraph 7.8
on page 35) to adapt the control to the
conditions in the building's heating system.
During circulation operation, the
water at the draw-off point cools
down abruptly.
Cold water flows directly into the
circulation pipe instead of into the
heat exchanger.
Check the functioning of the check valve of
the potable water circulation module (see
paragraph 9.1 on page 43). Replace a
defective check valve.
With larger draw-off quantities, the
target temperature is no longer
reached.
The heating water temperature is not
sufficient for the requested draw-off
quantity.
Increase the heating water temperature in
the storage cylinder (see characteristic lines
in the appendix).
The heat exchanger is contaminated
or calcified.
Clean the heat exchanger (see
paragraph 8.3.2 on page 39).
The volume flow of the heating water
is too low.
Check the system design and increase the
pump capacity in the primary supply from
the buffer storage cylinder if necessary.
The filter insert in the primary supply
is contaminated.
Clean or replace the filter insert (see
paragraph 8.5 on page 42).
Leakage at the heat exchanger
(external).
Leakage at the heat exchanger due to
corrosion. This can be the result of a
brazing material that is unsuitable for
the potable water quality.
Replace the heat exchanger. The brazing
material must be suitable for the potable
water quality (see information sheet “Advice
regarding corrosion protection” in the
appendix).
Pressure increase in the primary
circuit (potable water enters the
primary circuit). In the primary
circuit, the safety valve may be
triggered.
The hot water volume flow at the
draw-off point is too low.
The heat exchanger is heavily
calcified.
Decalcify the heat exchanger (see
paragraph 8.3.2 on page 39).
The cold water pressure is too low
(pressure reducer incorrectly set).
Check the setting of pressure reducer and
increase it if required.
36
134403082-V09.03.2022
Summary of Contents for Regudis W-HTE
Page 1: ...Regudis W HTE Produktabbildung Operating instructions EN ...
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Page 64: ...Regudis W HTE Appendix 12 7 EU Declaration of conformity 64 134403082 V09 03 2022 ...
Page 65: ...Regudis W HTE 65 134403082 V09 03 2022 ...
Page 66: ...Regudis W HTE 66 134403082 V09 03 2022 ...
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