Inspection And Maintenance; Inspection; Troubleshooting - Panasonic MGSDB2 Instruction Manual

9. Inspection and maintenance

Inspection

Periodically check and maintenance to assure safe and reliable
operation of the speed controller.
Practical considerations for checking and maintenance
Turning off/on of power supply must be done by the personnel
responsible for the maintenance work.
hecking items and period of maintenance work
Under normal operating condition
Ambient temperature (annual average) 30 °C,
100 % load factor, 20 hours max./day
Perform daily check and periodic check as shown below:
Category Frequency
• Ambient temperature, humidity, dust, dirt, foreign material
• Unusual vibration, shock, sound • Main circuit voltage
Daily check Every day
• Smell • Contaminated pin
• Damaged wiring • Loose connection (motor, devices)
• Misalignment • Foreign matters on load
Once/year
Periodic check • Excessively overheating motor
<Precautions>
The frequency specified for periodic check should be changed as necessary
depending on operating condition.
Guideline for replacement
No reference can be established since components and parts should
be replaced based on operating condition and method. Replace or
repair defective or malfunctioning parts.
Consult us when it is necessary to
DON'T
overhaul the assembly.
Product Category Life expectancy
Speed Electrolytic Approx.
controller capacitor 5 years
Motor, gear See motor instruction manual.
Check for
Remarks
Life expectancy is reference for replacement.
Potentially defective part must be replaced
before expected lifetime.
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Troubleshooting

If a problem occurs with your system, use the following procedure for
locating and remove the cause.
In the event the problem cannot be isolated or the speed controller
is suspected, or if you have any questions, please contact us or your
local agency.
Motor won't run
No
Wiring is correct
Yes
Voltage across pin 1 and 7
changes as the speed setting is
changed
Yes No
External noise
Proper load factor
Yes
Motor with thermal protector
No Yes
Thermal protector is active
No
· Thermal protector actuation
temperature:120–130 °C
Yes
Motor or capacitor fails
Motor is running at constant speed
No
Wiring is correct
Yes
Using jumper wire, short-circuit pins 2 and 7.
AC voltage (approx. 6.5 V) on pins 4 and 5
Yes
Speed controller is at fault
Review wiring against the wiring
diagram (see pp.17–27)
No
Prospect of speed controller failure
Protect against noise
Noise filter
· MR-2043: NEC Tokin Corp.
· SUP-EQ5-ER-6 (DV0P3611-5):
Okaya Electric Industries Co., Ltd.
Yes
SUP-EQ5-ER-6 is a recommended
noise filter for use in high noise level
environment.
No
Reduce the load or use a higher
output motor
· Halt the process for recovery
· Reduce the load or use a
higher output motor
· Arrange setting so that the
motor frame temperature is
kept below 90 °C
Review wiring against the
wiring diagram (see pp.17–27)
· Tachometer generator is
No
faulty
· Breaking of interconnecting
cable
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