Baxi Potterton Solar - Manual (Page 26)

Potterton Solar - Solar Thermal Domestic Hot Water System 26
Resistance table PT1000.
The correct function of temperature sensors can be
checked 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
YES
No display at solar differential
temperature controller
Controller fault
Replace controller
Is the 230/240V~ power
supply 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
Is the 230/240V~ power
supply correctly wired
YES
NO
YES
NO
Correct any wiring faults