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Potterton Solar - Solar Thermal Domestic Hot Water System26
Resistance table PT1000.
The correct function of temperature sensors can be
c
hecked on the basis of the following temperature
resistance table with a resistance measuring instrument:
5
.0 Fault finding
Temperature in ºC Resistance in Ohm
-30 882
-20 921
-10 960
0 1000
10 1039
20 1077
30 1116
40 1155
50 1194
60 1232
70 1271
80 1309
90 1347
100 1385
120 1461
140 1535
200 1758
Y
ES
No display at solar differential
t
emperature controller
Controller fault
Replace controller
Is the 230/240V~ power
s
upply switched on
YES
Has thermal cutout
on cylinder operated
(
unvented systems only)
NO
NO
Is internal
fuse operational
YES
NO
Replace internal fuse
Check wiring and rectify
Reset thermal cutout.
Investigate cause of operation
and rectify
Is the 230/240V~
power supply at the controller
terminal block
Switch on power supply
I
s the 230/240V~ power
supply correctly wired
Y
ES
NO
YES
NO
Correct any wiring faults