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Diagnostics
11.3 Fault codes (only in the case of non-acknowledgeable faults)
11.3
Fault codes (only in the case of non-acknowledgeable faults)
In the case of faults, the system outputs fault codes in the form of a flashing sequence of the
three red LEDs "GND FAULT", "THERMISTOR" and "OVERLOAD".
The example shows a fault with code number 6.
1 s
Figure 11-1
The table below describes the possible faults and the measures to be taken to remedy a fault.
Note
When remedying a fault, the following sequential order must always be followed:
1. Removing the control supply voltage at the 3RB24 solid-state overload relay.
2. Remove the cause of the fault.
3. Applying the control supply voltage at the 3RB24 solid-state overload relay.
Table 11-1
Code
1
2
3
4
5
6
7
104
1
2
3
4
5
6
1
1 s
Fault codes - example
Error codes
Description
Thermistor fault on starting.
The thermistor is activated but not detectable or no longer de‐
tectable. There is possibly a wire break.
Thermistor fault: Short-circuit.
The thermistor has short-circuited.
Thermistor fault: Wire break.
The connection is interrupted.
—
There is a fault in communication with the current measuring
module during starting.
The assignment of the rated operational current I
measuring module is incorrect:
The set rated operational current I
rent range of the current measuring module, or the rotary switch
is outside 10 ... 100%.
(See Chapter "Setting the current (rated operational current) and
trip class (Page 81)")
An invalid current measuring module has been detected.
2
3
4
5
6
to the current
e
is outside the permissible cur‐
e
SIRIUS 3RB24 electronic overload relay for IO-Link
Equipment Manual, 07/2022, NEB969165602000/RS-AA/003
Remedy
1)
Check the thermistor. Deac‐
tivate the thermistor or con‐
nect the thermistor.
Remove the short-circuit.
Remove the interruption
and connect the thermistor.
—
Check that the current
measuring module is con‐
nected.
Check the set rated opera‐
tional current I
on the solid-
e
state overload relay. Cor‐
rect the setting error with
the help of the two rotary
switches on the device.
Connect the 3RB29.. cur‐
rent measuring module.
You can find the suitable
current measuring mod‐
ules in Chapter "System
components (Page 27)".
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