30
EN
709.75 | 07.50
The pump, which is connected to the controller,
is not running, although its switch-on conditions
have been fulfilled.
Secondary symp-
toms
Possible cause / remedy
The pump symbol
rotates in the dis-
play.
The pump connecting cable
is not connected, interrupted
or the fuse in the controller is
burned out.
If necessary, have professional
personnel replace the fuse.
(Replacement fuse is located in
the casing).
The pump sym-
bol does not
rotate
The display is
backlit in red
OFF flashes
•
•
•
Operating switch is set to man-
ual
Set the operating switch to
automatic operation.
The pump sym-
bol does not
rotate
The display is
backlit in yellow
Evaporation
symbol or max
are flashing
•
•
•
No fault.
The system has stopped because
maximum collector temperature
or maximum storage tank tem-
perature have been reached.
Summary of Contents for Temperature differential controller
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