HP Anab EQ5 - Manual (Page 103)

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TECO – Westinghouse Motor Company Maintenance & Inspection 97
7. Maintenance and Inspection
It is recommended that daily and periodic inspections be carried out to insure trouble-free operation
and long-term reliability. The following are recommendations for conducting these inspections.
7-1 Daily Inspection
During operation, a visual inspection for abnormal operation can be completed externally without
removing the covers.
The inspections should cover the following:
(1) The performance is as expected and is within specifications.
(2) The environment conforms to the drive specifications.
(3) The digital operator is functioning normally.
(4) There are no abnormal sounds, vibrations, or odors.
(5) There are no indications of overheating or discoloration.
7-2 Periodic Inspections
Periodic inspections are carried out after stopping drive operations, disconnecting the power source,
and removing the protective cover(s).
DANGER
• Because the large capacitors in the main DC circuit retain lethal voltage levels after power
is disconnected and take time to discharge, wait at least five minutes after turning off the
power supply for inverter rated at 30HP/CT, 40HP/VT or less, and ten minutes for inverter
rated at 40HP/CT, 50HP/VT or more. (Check that the charge lamp (CRG) is off, and that
the voltage is 25V DC or less between terminals P(+) and N(-). Otherwise, electric shock
or injury may result.
• Only authorized personnel should carry out maintenance and component replacement
operations. (Remove metal jewelry such as watches and rings and use insulated tools.)
• Never modify the inverter. Otherwise, electric shock or injury may result.
Table 7-2-1 Periodic Inspection List
Area to Check Items to Check How to Inspect Evaluation Criteria
Environment
1) Check the ambient temperature, humidity,
Vibration and atmosphere (dust, gas, oil mist,
water drops).
2) Is the area surrounding the equipment free of
foreign objects?
1) Conduct visual
inspection and use
the appropriate
equipment.
2) Visual inspection.
1)Results comply
with specifications.
2) The area is clear.
Digital operator
1) Is the display hard to read?
2) Are the characters complete? 1) Visual inspection.
2) Visual inspection. 1) The display can be
read.
2) Characters are
complete.
Structure
(frame & cover)
1) Is there abnormal sounds or vibration?
2) Are fasteners loose?
3) Is there deformation or damage?
4) Is there discoloration as a result of
overheating?
5) Are there stains or accumulated dust?
1) Visual and aural
Inspection.
2) Tighten.
3) Visual inspection.
4) “
5) “
1) No abnormalities
2) “
3) “
4) “
5) “
Main circuit
Common
1) Are there loose or missing fasteners?
2) Is there deformation, cracks, damage, and
discoloration due to overheating or
deterioration in the equipment and insulation?
3) Are there stains and accumulated dust?
1) Tighten.
2) Visual inspection.
3) “ 1) No abnormalities
2) No abnormalities
Note: Discoloration
of the bus bar does
3) not indicate a
problem.
Conductor and
wire
1) Is there discoloration or distortion of a
conductor(s) due to overheating?
2) Are there cracks, crazing or discoloration of
the cable sheath?
1) Visual inspection.
2) “
1) No abnormalities
2) “
Cont.