19
UK
LED display Cause of the fault Troubleshooting
K1
E1
T1
POWER
K2
E2
Fault T
Fault
• Overvoltage
• Undervoltage
► Check wiring
► Check power supply
K1
E1
T1
POWER
K2
E2
Fault T
Fault
• Overvoltage
• Undervoltage
► Check wiring
► Check power supply
K1
E1
T1
POWER
K2
E2
Fault T
Fault
K1
E1
T1
POWER
K2
E2
Fault T
Fault
• Undervoltage ► Check wiring
► Check power supply
K1
E1
T1
POWER
K2
E2
Fault T
Fault
K1
E1
T1
POWER
K2
E2
Fault T
Fault
• Short circuits ► Check wiring
K1
E1
T1
POWER
K2
E2
Fault T
Fault
• Input S43 active more than 0�5 s
after input S34 (→ 8.1.2)
• Feedback contact error
• Short circuit S34/S44
► Check wiring
► Switch the fail-safe sensor/
switch off and on again
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