IFM Electronic G1502S - 8�3�3 Fault Diagnosis

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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
Fault
• No voltage supply
• Overvoltage
• Connection A1/A3 or A1/A2
reversed
► Check wiring
► Check power supply
K1 E1 T1 POWER
K2 E2
Fault T
Fault
• 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
Fault
• When voltage is applied:
Feedback contacts open
► Check output circuit
► Check feedback contacts
► Exchange external contactor
K1 E1 T1 POWER
K2 E2
Fault T
Fault
• 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
Fault
• Connections A3/A2 reversed ► Check wiring
K1 E1 T1 POWER
K2 E2
Fault T
Fault
• Missing link Y4/Y5 ► Check wiring
K1 E1 T1 POWER
K2 E2
Fault T
Fault
• Overvoltage
• Undervoltage
► Check wiring
► Check power supply