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Logamatic SC40 - Technical specifications are subject to change without prior notice.
71
Faults
8
8.2 Faults not indicated on the display
Type of fault
Effect Possible causes Remedy
Pump not running even though conditions for switching on are met.
The solar storage cylinder is
not being supplied by the
solar thermal system.
No power supply; fuse or power
cable faulty.
Check fuse and replace if necessary.
Have electrical system checked by an
electrician.
Pump switched off in “manual
mode”.
Use the “manual mode” function to
switch to automatic.
The temperature at the bottom of
the cylinder is close to, or above the
set maximum cylinder temperature.
When the temperature drops 3 K
(°C)
below the maximum cylinder tempera-
ture, the pump switches on.
The collector temperature is close
to, or above the set maximum col-
lector temperature.
When the temperature drops 5 K
(°C)
below the maximum collector tempera-
ture, the pump switches on.
There is no electrical power lead to
the pump or it is not connected.
Check the line.
Cooling function active.
The controller checks which cylin-
der can be charged (only in systems
with two cylinders)
Pump is faulty. Check pump and replace if necessary.
The system animation on the display is running and the pump is “humming”.
The solar storage cylinder is
not being supplied by the
solar thermal system.
The pump is stalled due to a
mechanical blockage.
Unscrew and remove the slotted
screw on the pump head and use a
screwdriver to release the pump shaft.
Do NOT strike the pump shaft.
Temperature sensor is displaying an incorrect figure.
Pump is being activated/deac-
tivated too early/too late.
Temperature sensor incorrectly fit-
ted.
Incorrect temperature sensor fitted.
Check position, installation and type of
sensor; add heat insulation if neces-
sary.
Domestic hot water is too hot.
Risk of scalding Storage cylinder temperature limit
and mixing valve are set too high.
Set the cylinder temperature limit and
hot water mixer to a lower setting.
Domestic hot water too cold (or hot water flow rate too slow).
Domestic hot water thermostat on
heating appliance, on heating con-
troller or on mixing valve is set too
low.
Set temperature according to the
appropriate operating instructions
(max. 60 °C).
Tab. 40 Possible faults not indicated on the display
71


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