SR882 operation manual
~ 53 ~
Symptoms
Secondary
symptoms
Possible cause
Procedure
Controller
does
not display any
functions at all
Display
shows
nothing, no display
illumination
Controller power supply
is interrupted or program
is out of work
Check the controller
power cable
Or change fuse
The solar pump
doesn’t operate,
despite the fact
that
switch-on
conditions
are
satisfied
The pump symbol on
the display blinks
Pump power supply is
interrupted
Check
the
pump
power cable
Pump
doesn’t
operate
The pump symbol on
the display doesn’t
blink.
Lighted
Or blinks
The maximum storage
tank
temperature
(SMX1) is reached
The maximum collector
temperature
(EM)
is
reached.
No fault
Tn - - -
Error
message
displays
on
the
screen
Fault (short circuit or
open
circuit)
in
a
temperature sensor
On
the
controller,
check
the
current
values
of
all
connected
temperature sensors,
replace all defective
sensors
and
/or
cabling.
The solar pumps
operated, despite
the fact that the
switch-on
conditions are not
satisfied.
The pump symbol on
the display blinks.
Holiday function or Frost
protection function or
tank re-cooling function
is activated.
No problem, it is
normal. If necessary
to
deactivate
the
corresponding
functions.
Any function
can’t
activate
In submenu not
select the function
All inputs and outputs
are used; inputs or
outputs can only have
one function every time.
No fault
Warning
!
Remove the device from the mains supply before opening the case
A potentially defective sensor can be checked using an ohmmeter. To do this, the sensor
must be disconnected, its resistance measured, and the value compared with the figures in
the table below, small deviation (±1%) is acceptable,