SR971,SR972 Solar station operation manual
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54
T1 - - -
Error message
displays on the screen
Fault (short circuit or
open circuit) in a
temperature sensor
On the controller,
request the current
values from 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 in
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.
One function can’t
be activated
There is no function
selection in submenu
All inputs and outputs
are used; inputs and
outputs can’t be used
doubly.
No fault on
controller
Pump works, but
flow rate shows
0.0L/min
No filter installed on
flow and return pipe
进
Blade of electrical
flow meter is
logged .
Dismount the pipe
from solar station,
clean pipe, until
flow rate shows
on display,
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
110
120
Ω
1000
1039
1077
1116
1155
1194
1232
1270
1309
1347
1385
1422
1460
