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8.3.3 Fault diagnosis
In case of a fault switch the safety relay off and on again!
LED display
Cause of the fault
Troubleshooting
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
• No voltage supply
• Overvoltage
• Connection A1/A3 or A1/A2
reversed
►
Check wiring
►
Check power supply
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
• Wire break
• Feedback contacts open
• Time-dependent contacts
►
Check wiring
►
Switch the safety relay off
and on again
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
• When voltage is applied:
Feedback contacts open
►
Check output circuit
►
Check feedback contacts
►
Exchange external contactor
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
• Wiring fault
•
Missing link Y4/Y5
• Short circuit
• Inputs S34 and S43 activated
when voltage is applied
►
Check wiring
►
Deactivate inputs and
RESET or voltage failure
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
• Connections A3/A2 reversed
►
Check wiring
K1
E1
T1
POWER
K2
E2
Fault
T
Faul
t
•
Missing link Y4/Y5
►
Check wiring
K1
E1
T1
POWER
K2
E2
Fault
T
Fault
• Overvoltage
• Undervoltage
►
Check wiring
►
Check power supply