Viessmann Solar-Divicon PS10 Installation And Service Instructions Manual page 15

LED on the HE circulation pump
LED
Illuminated green
Flashes green in
short intervals
Fault indications
■ Flashes red and
green alternately
■ Flashes red
■ LED off
Meaning
Circulation pump in
operation
Circulation pump in
standby
Circulation pump is
ready for operation
but not running.
Note
The circulation
pump starts auto-
matically after the
cause of the fault
has been re-
moved.
Circulation pump
switched off
(blocked)
—
Cause
—
—
■ Undervoltage
(< 160 V~)
■ Overvoltage
(> 253 V~)
Motor temperature
too high
Circulation pump
does not start auto-
matically.
No operating volt-
age.
LED faulty
PCB faulty
Remedy
—
—
Check the power
supply. (195 V~ < U
< 253 V~)
Check ambient and
heat transfer medi-
um temperatures.
Replace circulation
pump (see
page 11)
Check connecting
cable.
Check whether the
circulation pump is
running.
Replace the circula-
tion pump (see
page 11).
15