HP Anab EQ5 - Manual (Page 104)

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TECO – Westinghouse Motor Company Maintenance & Inspection 98
Main circuit
Terminal block Is there damage? Visual inspection No abnormalities
Main DC
Capacitor(s)
1) Is there electrolyte leakage, discoloration,
crazing, or swelling of the case?
2) Is the safety valve not protruding or are
valves protruding too far?
3) Measure the capacitance if necessary.
1) Visual inspection
2) Visual inspection
3) * Estimate life
expectancy from
maintenance
information and from
measurements using
capacitance
measuring
equipment.
1) No abnormalities
2) “
3) Capacitance ≧
initial value x 0.85
Resistor
1) Is there unusual odor or damage to the
insulation by overheating?
2) Is there an open circuit?
1) Visual and
olfactory inspection.
2) Conduct a visual
Inspection or use
a multimeter by
opening the
connection on one
side.
1) No abnormalities
2) Less than
±10% of
the indicated
resistance value.
Transformer
and reactor Is there abnormal buzzing or an abnormal
odor? Auditory, olfactory,
and
visual inspection No abnormalities
Magnetic
contactor and
relay 1) Is there chattering during operation?
2) Are the contacts pitted or burnt? 1) Auditory inspection
2) Visual inspection 1) No abnormalities
2) “
Contro
l circuit
Control PC
board and
connector
1) Are there any loose screws or connectors?
2) Is there an unusual odor or discoloration?
3) Are there cracks, damage, deformation, or
rust?
4) Is there electrolyte leakage or damage to
any of the capacitors?
1) Tighten.
2) Visual and olfactory
inspection
3) Visual inspection
4) * Estimate life
expectancy by visual
inspection and
maintenance
information.
1) No abnormalities
2) “
3) “
4) “
Cooling system
Cooling fan
1) Is there any abnormal sound or vibration?
2) Are any fasteners loose?
3) Is there discoloration due to overheating? 1) Auditory and visual
inspection.
2) Tighten.
3) Visual inspection
4) * Estimate life
expectancy by
maintenance
information
1) The fan must
rotate smoothly.
2) No abnormalities
3) “
Ventilation
Is there foreign matter on the heat sink or intake
and exhaust ports? Visual inspection No abnormalities
Note: If equipment is stained, wipe with a clean cloth. Vacuum the dust.
* The maintenance information is stored in the inverter digital operator and indicates the electrostatic
capacitance of the main DC circuit capacitors and the life expectancy of the electrolytic capacitors on the
control PC board and of the cooling fans. Use this data as the basis to estimate the life expectancy of
parts.