SR971,SR972 Solar station operation manual
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53
9.2 Trouble checking
The controller is a quality product, conceived for years of continuous trouble-free operation. If
a problem occurs, the cause of the problem very often lies not in the controller but in the
peripheral components. The following description of some well-known problems should help
the installer and operator to isolate the problem, so that the system can be place back into
operation as quickly as possible and to avoid unnecessary costs. Of course, not all possible
problems can be listed here. However, most of the normal problems encountered with the
controller can be found in the list below, only return the controller to seller when you are
absolutely sure that none of the problems listed below is responsible for the fault.
Symptoms
Secondary
symptoms
Possible cause
Procedure
Controller does
not appear to
function at all
Display shows nothing,
no display illumination
Controller power
supply is interrupted
or program is out of
work
Check the
controller power
cable,fuse
The solar pump
doesn’t operate,
despite the fact
that switch-on
conditions are
satisfied
The pump symbol in
the display blinks
Pump power supply
is interrupted
Check the pump
power cable
Pump doesn’t
operate
The pump symbol in
the display doesn’t
blink.
Lighted or
blinks
The maximum
storage tank
temperature (SMX)
has been reached
Tank reaches 95
o
C
No fault
Lighted or
blinks
The
maximum
collector temperature
(EMOF) has been
reached.
No fault
