Universal Security Instruments 3895 Manuel d'instructions télécharger pdf (Page 26)

Potterton Solar - Solar Thermal Domestic Hot Water System26

Resistance table PT1000.

The correct function of temperature sensors can be

hecked on the basis of the following temperature

resistance table with a resistance measuring instrument:

.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

No display at solar differential

emperature controller

Controller fault

Replace controller

Is the 230/240V~ power

upply switched on

YES

Has thermal cutout

on cylinder operated

(

unvented systems only)

Is internal

fuse operational

YES

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

s the 230/240V~ power

supply correctly wired

YES

Correct any wiring faults

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Universal Security Instruments 3895 Manuel d'instructions Page 26

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