Troubleshooting Guide
Problems and Symptoms
6 - 2
SKF Multilog O
n-Line System IMx-M
User Manual
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Signal disturbed by external noise
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Grounding loop
Suggested solution:
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First carry out sensor/cable test. In addition, check the sensor mounting. If this
yields no result, contact SKF Condition Monitoring Center Luleå.
Speed signal unobtainable/faulty for a certain machine
Possible causes:
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Cable fault (short circuit/broken) to speed sensor
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Faulty speed sensor, or faulty installation
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Speed signal too weak/impedance too high for IMx
-M
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Pulse duration too long or too short / frequency too low or too high
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Faulty IMx-M speed input
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Incorrect setting in hardware
Suggested solution:
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Test speed input.
Analog input gives faulty/no signal
Possible causes:
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Cable fault (short circuit/break) to sensor
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Faulty sensor
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Faulty earthing
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Incorrect setting in hardware
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Faulty IMx-M input
Suggested solution:
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Carry out control of sensor and cabling.
IMx-M alarm relay does not activate despite of warning or alarm
Possible causes:
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Disarm active
Suggested solution:
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Check the configuration.
@ptitude Monitor ceases to work with a certain IMx-M rack
Possible causes:
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Loss of voltage in IMx-M rack
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Hardware fault in IMx-M rack, such as power supply or processor module
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Break in Ethernet network