Mitsubishi LE-30CTN, Instruction Manual

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11.2 Maintenance
11. Inspection and Maintenance
46
11.2 Maintenance
11.2.1 Periodical check
• Periodically check the following items.
[1] Check that the inside of the panel is not abnormally heated by a heat generating substance or direct
sunlight.
[2] Check that there is not any dust or conductive dust in the panel.
[3] Check the wires and terminals for looseness and other problems.
11.2.2 Tension detector
• It is recommended that the zero point and the span should be adjusted again by periodical inspection.
Especially when a tension detector used has a larger rated load compared with the actual tension, the
mechanical stress of the tension detector may contribute considerably to aging deterioration.
11.3 Error display
• When an error message appears on the LCD display, solve the problem as follows.
11.3.1 At zero tuning of tension
The detector roller may be too heavy for the rated load of the tension
detector.
Check the mass of the detector roller. If necessary, reduce the mass of the
detector roller, or select the tension detector again and replace with another
type of detector.
[1] The difference between the signal voltages output from the right and left
detectors exceeds 50% of the output voltage of the rated load.
Check the specifications of the right and left tension detectors, and also
check the right and left detector rollers for heart gap, etc.
[2] When only one detector is used, press the [ T ] key. The span adjustment
will be completed.
11.3.2 At span tuning of tension detector
An extremely large static load is applied during span tuning.
The rated load of the tension detector may be too small for the operation
tension. Check the full-scale set value and the rated load of the tension
detector.
[1] An extremely small static load (30% or less of the full-scale set value)
applied during span adjustment. Increase the load, and then apply the
static load again.
[2] The rated load of the tension detector may be too large for the operation
tension. Check the rated load of the tension detector.
[1] The difference between the signal voltages output from the right and left
detectors exceeds 50% of the output voltage of the rated load.
Check that the rope hanging the weight is at the center of the detector
roller. Also check the specifications of the right and left tension
detectors, and check the distance directly from the center for the right
and left detector rollers, etc.
[2] When only one detector is used, press the [ T ] key. The span adjustment
will be completed.