Usdt 3002, Tips for troubleshooting, F ω °f ω – Thermo Technologies USDT 3002 User Manual
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USDT 3002
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1
2
S1
S2
S3
3
4
5
6
Temp. Sensor
Pt1000
L
N
R1
N
R2
N
20
19
18
17
16
15
S4
7
8
14
13
12
2 (1) A 115
2
V~
(1) A 115 V~
R1
R2
T4A
115 V~
5. Tips for Troubleshooting
can fuse T4A
If a malfunction occurs, a notification is given on the display
of the controller:
Operating control lamp
Warning symbol
Operating control lamp off
The power supply of the controller should
be checked if the control lamp goes out.
o.k.
no
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).
Operating control lamp flashes red. On the display appears
the symbol
and the symbol
.
Sensor defect. An error code is shown
on the relevant sensor indication channel
instead of a temperature.
- 88.8
888.8
Line break. Check
the line.
Short-circuit.
Check the line.
Pt1000-temperature sensors pinched
off can be checked with an ohmmeter.
In the following the resistance values
corresponding to different temperatures
are listed.
°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