Viessmann SCU224 Instrukcja Obsługi Pobierz pdf (Strona 21)

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SCU224

5. Tips for fault indication

If a malfunction occurs, it will be indicated on the display of

the controller:

Operating control lamp

Warning symbol

S1 S2 S3

3456

Temp. Sensor Pt1000

LNR1NR2N

201918171615

141312

DE - 45527 Hattingen

DeltaSol BS Plus

2 (1) A 115

(1) A 115V~

T4A

115 V~

CU 72060171 01

UL 60730-1A:2002

CSA E60730.1:2002

VBus

910

can fuse 4A

Operating control lamp offOperating control lamp ﬂashes red. On the display the

symbols and appear.

°F Ω °F Ω

14 961 131 1213

23 980 140 1232

32 1000 149 1252

41 1019 158 1271

50 1039 167 1290

59 1058 176 1309

68 1078 185 1328

77 1097 194 1347

86 1117 203 1366

95 1136 212 1385

104 1155 221 1404

113 1175 230 1423

122 1194 239 1442

Resistance values of the

Pt1000-sensors

Check the power supply

o.k.

The can fuse of the controller is defective.

It can be replaced after removal of the

front cover (spare fuse is enclosed in the

accessory bag).

Sensor defect. An error code is shown

on the relevant sensor indication channel

instead of a temperature.

- 88.8888.8

Line break. Check

the line.

Short-circuit.

Check the line.

Pt1000-temperature sen sors can be che-

cked with an ohmmeter. The following

table lists the corresponding resistance

values for different temperatures.

1 2 ... 16 17 18 19 20 21 22 23 24

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