Hitachi BRD-E2-30K, Operation Manual

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Table 10.1 Daily and Periodic Checks
Check cycle
Check
point
Check item Checking
Daily Periodic
Checking method Requirement
Typical part
replacement
timing
Testing tools
Environment Check ambient temperature, relative humidity, and
concentration of dust, toxic gases, and oil mist.
• ›
Visually and audibly The ambient temperature should be -
10
°
C to +50
°
C (not freezing).
The ambient relative humidity should be
20% to 90% (non-condensing).
No abnormal vibration and noise should
be detected.
–
Thermometer,
hygrometer, and
multi-meter
General
Device status
Supply voltage Check for abnormal vibration and noise from the device.
• ›
General (1) Insulation resistance test (between main circuit
terminal and the grounding terminal)
(2) Check for loose screws (terminal bases, etc.).
(3) Check for overheated or burnt parts.
(4) Cleaning
• ›
• ›
• ›
• ›
(1) Tighten the
screws firmly.
(1) (2): No problem should be detected.
Tightening torques (in N.m)
M3: 0.6 to 0.9
M8: 10 to 13.5
M4: 1.5 to 2.1 M10: 21 to 28
M5: 2.8 to 3.9
M6: 4.1 to 5.3
– 500V meggar
Terminal board Check for damages and breaks.
• ›
Visually No problem should be detected. – –
Smoothing capacitor
on the PC board (1) Check for electrolyte leaks.
(2) Check whether the capacitor is swollen.
• ›
• ›
(1) (2) Visually (1) (2) No problem should be detected. 5 years (Note) –
Main
circuit
Resistor (1) Check for cracks and discoloration.
• ›
(1) Visually (1) No problem should be detected. – –
Operation check Carry out the sequence protector test to check the
operation of the protective and display circuits.
• ›
Simulate the output of
the inverter protection
circuit. The circuits should work normally.
– –
General
(1) Check for burnt smell and discoloration.
(2) Check for rust and corrosion.
• ›
• ›
Visually
No problem should be detected. 5 years (Note) –
Control
circuit
Protective
circuit
Component
check
(including
PC board)
Capacitor
(1) Check for electrolyte leaks and casing deformation.
• ›
Visually
Note: The ambient temperature affects the service life of the capacitor. See Ambient Temperature vs. Capacitor Life (Appendix).