Baxi Solarflo Commissioning, Maintenance & Servicing Manual page 26

No display at solar differential
temperature controller
Is the 230/240V~ power
supply correctly wired
YES
Is the 230/240V~ power
supply switched on
YES
Has thermal cutout
on cylinder operated
(unvented systems only)
NO
Is the 230/240V~
power supply at the controller
terminal block
YES
Is internal
fuse operational
YES
Controller fault
Replace controller
26 Solarflo - Solar Thermal Domestic Hot Water System
NO
Correct any wiring faults
NO
Switch on power supply
Reset thermal cutout.
YES
Investigate cause of operation
and rectify
NO
Check wiring and rectify
NO
Replace internal fuse
5.0 Fault finding
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:
Temperature in ºC
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
120
140
200
Resistance in Ohm
882
921
960
1000
1039
1077
1116
1155
1194
1232
1271
1309
1347
1385
1461
1535
1758