Solar working station operation manual SR881
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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
Press reset button
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 (SMX) is
reached
The
maximum
collector temperature
(EM) is reached.
No fault
T1------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.
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,
PT1000 resistance value
℃
0
10
20
30
40
50
60
70
80
90
100
Ω
1000
1039
1077
1116
1155
1194
1232
1270
1309
1347
1385
NTC 10K B=3950 resistance value
℃
0
10
20
30
40
50
60
70
80
90
100
Ω
33620 20174 12535 8037 5301 3588 2486 1759 1270 933
697
