44
742.110 | 14.50
EN
The controller has detected faulty operation
of the system. This is probably caused by
swapped collector connections.
Check the collector con-
nections.
A short-circuit exists at output
R1
, the pump
connected to output
R1
flashes. Possible
causes:
•
The pump is faulty.
•
Wiring fault
•
Check the pump.
•
Check the wiring to
R1
.
Output
R1
is overloaded, the pump connect-
ed to output
R1
flashes. Cause: The permis-
sible values for
R1
specified on the type plate
have been permanently exceeded, the output
has been switched off.
Check the electrical data
of the pump, replace
pump if necessary.
R1
is
automatically switched on
again.
Tab. 6: Error messages
14.3
Checking the Pt1000 temperature sensors
Danger
Risk of death by electrocution! Before opening the device, make sure that all cables
leading to the device have been disconnected from the mains power and cannot be
unintentionally reconnected to the mains power.
1. Remove the terminal cover.
2. Disconnect the temperature sensor.
3. Measure the resistance of the temperature sensor with an ohmmeter and compare
with Tab. 7. Small deviations are acceptable.
4. Mount the terminal cover.
Temperature-resistance assignments
Temperature [°F]
–22
–4
14
32
50
68
86
104
122
140
158
Temperature [°C]
–30
–20
–10
0
10
20
30
40
50
60
70
Resistance [Ω]
882
922
961 1000 1039 1078 1117 1155 1194 1232 1271
Temperature [°F]
176
194
212
230
248
266
284
302
320
338
356
Temperature [°C]
80
90
100
110
120
130
140
150
160
170
180
Resistance [Ω]
1309 1347 1385 1423 1461 1498 1536 1573 1611 1648 1685
Tab. 7: Temperature-resistance assignment with Pt1000 temperature sensors
Summary of Contents for TR-A501T-U
Page 47: ...47 742 110 14 50 EN 18 Notes ...
Page 48: ...48 742 110 14 50 EN 742110 ...
