PAW FC4.13, Manual For Specialised Craftsman

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30
en
Notes
Pump noise can be heard, bubbling in the pipes.
System vented?
no
Vent the system.
Draw-off amount is too small.
Sufficient system pressure in the
secondary circuit?
yes no
Plate heat exchanger calcified?
Check system pressure in the sec-
ondary circuit; if necessary, increase
pressure.
yes
Draw-off temperature is too low.
Increase the adjustment value for
the HW set temperature.
Is the HW set temperature high
enough?
yes no
Clean the secondary side of the
plate heat exchanger; if necessary,
replace the plate heat exchanger.
Pressure loss in the primary circuit
too high?
yes
Check the pipework of the primary
circuit; change if necessary.
DHW heating does not work
Check the controller; Check the
fuse of and the power supply to the
controller.
Controller in operation?
yes no
System vented?
no
Vent the system.
yes
Has the FlowSonic ultrasonic
sensor in the HW flow been
connected correctly? Does it
work faultlessly? Has the Pt1000
temperature sensor in the store
flow been connected correctly?
Does it work faultlessly?
Check the FlowSonic ultrasonic
sensor including its cable; if nec-
essary, replace the sensor. Check
the Pt1000 temperature sensor
including the sensor cable; if nec-
essary, replace the sensor.
no
yes
Check the Pt1000 temperature
sensor including the sensor cable; if
necessary, replace the sensor.
Has the temperature sensor in
the store flow been connected
correctly? Does it work faultlessly?
yes no
Does the primary pump work
faultlessly?
no
Check the primary pump including
its cable; dismount and replace the
pump if necessary.