9.1
Causes of problems
Controller does not appear to function at all:
Secondary symptoms
•
Display shows nothing
•
No display illumination
The solar pump does not operate, despite the fact that the switch-on conditions
are satisfied:
Secondary symptoms
The pump symbol in the
display rotates
The pump symbol in the
display does not rotate
•
The pump symbol in the
display does not rotate
•
The display illumination
is red
•
A tool symbol flashes in
the display
•
The pump symbol in the
display does not rotate
•
The display illumination
flashes red
4
Possible cause
Controller power supply
is interrupted
Possible cause
•
Pump power supply is
interrupted
•
Pump has seized up
•
The maximum storage
tank temperature has
been reached
•
The maximum collector
temperature has been
reached
•
In multi storage tank
systems: the system has
stopped due to a priority
test
•
The minimum collector
temperature has not
been reached
•
The maximum loading
temperature has been
reached
•
Stagnation reduction
activated
•
Storage tank deactivated
The operating switch is set
to manual operation and
the pump output is set to
"off"
Short circuit or interruption
of a temperature sensor
EN
Procedure
•
Check the controller power cable
•
Check the fuse for the power supply
•
Check the fuse at the controller (replace-
ment fuse is located in the case)
Procedure
•
Check the pump power cable
•
Check the fuse in the controller
(replacement fuse is located in the case)
•
Get the pump working again, replace
if necessary
•
No fault
•
Set the operating switch to automatic
operation
•
On the controller, request the current
values from all connected temperature
sensors
•
Check all defective sensors and/or
sensor cable
78.138 | 08.1