User manual

741.011 | 12.18

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

15.3 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 [°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 [°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: Pt1000 – Temperature/resistance assignments