Operation manual of solar controller SR1568
Page 83 of 87
The temperature difference between tank and collector increases enormously
during operation; the collector circuit cannot dissipate the heat.
Collector circuit pump defective?
Heat exchanger calcified? Yes
Heat exchanger too small?
Replace with correctly sized
one.
The solar circuit pump does not work, although the collector is considerably
warmer than the tank.
There is no current; check fuses /
replaces it, and checks power supply
Does the pump start up in manual operation?
Is the pump current enabled by the controller?
Controller might be defective - replace it.
Turn the pump shaft using a screwdriver;
now possible?
Pump is defective - replace it. Screwdriver;
Now passable? one.
The adjusted temperature difference for
starting the pump is too high; choose a
value which makes more sense.
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