SKF Multilog IMx-S Series User Manual page 30

Troubleshooting Guide
Problems and Symptoms
Speed signal unobtainable/faulty for a certain machine
Possible causes:
• Cable fault (short circuit/broken) to speed sensor
• Faulty speed sensor, or faulty installation
• Speed signal too weak/impedance too high for IMx-S
• Faulty IMx-S speed input
• Incorrect setting in hardware
Suggested solution:
• Test speed input.
Analogue input gives faulty/no signal
Possible causes:
• Cable fault (short circuit/break) to sensor
• Faulty sensor
• Faulty earthing
• Incorrect setting in hardware
• Faulty IMx-S input
Suggested solution:
• Carry out sensor/cable test.
Load input gives faulty/no input signal
Possible causes:
• Cable fault (short circuit/break) to sensor
• Faulty sensor signal
• Faulty earthing
• Faulty IMx-S load input
• Incorrect setting in software
Suggested solution:
• The load input acts as an analogue input. Therefore, first carry out cabling/input
test. Contact SKF Condition Monitoring Center Luleå if this gives no result.
IMx-S alarm relay does not activate despite of warning or alarm
Possible causes:
• Cabling fault from IMx-S to alarm panel
• Configuration error in software
• Hardware fault in IMx-S unit
Suggested solution:
• Check the relay signal.
6 - 2 SKF Multilog On-Line System IMx-S
User Manual