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"Regumaq X-25"
CAUTION
Risk of scalding due to excessively hot po-
table water at the draw-off points!
In emergency operation, the primary pump
pumps uncontrolled water from the storage
cylinder through the heat exchanger. In extreme
cases, this can lead to the water at the draw-off
points reaching roughly the same temperature
as the storage cylinder water.
f In emergency operation, reduce the tem-
perature of the storage cylinder circuit so far
that the temperature in the storage cylinder
does not exceed the desired potable water
temperature.
f Only use emergency operation temporarily
to provisionally ensure the supply of pota-
ble hot water. Replace the defective sen-
sor immediately and restore regular pump
operation.
Emergency operation can be activated and/or
deactivated via the DIP switch (see position (2)
in Illust. 26 on page 32).
DANGER
Danger to life due to electric current!
Danger to life due to contact with live compo-
nents.
f Completely disconnect the product from the
power supply.
f Check that no voltage is present.
f Secure the product against switching back
on.
f The product may only be installed in dry
indoor areas.
NOTICE
Damage to electronic components due to
electrostatic discharge!
f Before touching the inside of the housing,
take suitable equipotential bonding mea-
sures. Touch a grounded component, such
as a tap or radiator.
1 2 3 4
Illust. 34: Emergency operation
138112581-V01.10.2019
8.3
Anti-lock protection
The anti-lock protection serves to prevent the primary
pump from seizing up after extended periods of down-
time.
24 hours after the end of the last time it was activated,
the pump will be switched on for 5 seconds.
8.4
Displays
The nominal temperature and error codes are displayed
in the nominal hot water temperature and error display
(see Illust. 33 on page 34).
Errors are signaled in combination with the control LED.
(Observe the troubleshooting table in section 9.1 on
page 37).
8.4.1
Error messages on the display
Error code
Error
E1
S1, Sensor storage
cylinder supply defec-
tive
E2
S2, Sensor hot water
temperature defective
E3
S3, Sensor cold water/
circulation defective
E4
(LIN) pump error
The error message is automatically reset once the error
has been resolved.
8.4.2
Control LED
Colour
Constantly lit
Green
All OK
Red/
green
8.5
Replacement of the fuse
The controller is protected with a fuse (see position (1)
in Illust. 26 on page 32).
The fuse holder includes a spare fuse in the
scope of delivery.
Operation
LED display
Red (fl ashing)
Red (fl ashing)
Red (fl ashing)
Red (fl ashing)
Flashing
Emergency operation
active
35
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