SJ200 Inverter
Maintenance and Inspection
Monthly and Yearly Inspection Chart
Item Inspected | Check for... | Inspection Cycle | Inspection | Criteria | |||
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| Ambient | Extreme | ✔ |
| Thermometer, | Ambient temperature | |
| environment | temperatures |
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| hygrometer | between | |
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| & humidity |
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| Major devices | Abnormal | ✔ |
| Visual and aural | Stable environment for | |
Overall |
| noise & vib. |
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| electronic controls | |
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| Power supply | Voltage | ✔ |
| Digital volt meter, | 200V class: | |
| voltage | tolerance |
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| measure between | 200 to 240V 50/60 Hz | |
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| inverter terminals | 400V class: | |
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| [L1], [L2], [L3] | 380 to 460V 50/60 Hz | |
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| Ground | Adequate |
| ✔ | Digital volt meter, | 5 Meg. Ohms or greater | |
| Insulation | resistance |
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| GND to terminals |
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| Mounting | No loose |
| ✔ | Torque wrench | M3: 0.5 – 0.6 Nm | |
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| screws |
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| M4: 0.98 – 1.3 Nm | |
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| M5: 1.5 – 2.0 Nm | |
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| Components | Overheating |
| ✔ | Thermal trip events | No trip events | |
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| Housing | Dirt, dust |
| ✔ | Visual | Vacuum dust and dirt | |
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| Terminal block | Secure |
| ✔ | Visual | No abnormalities | |
Main |
| connections |
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circuit | Smoothing | Leaking, | ✔ |
| Visual | No abnormalities | |
| capacitor | swelling |
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| Relay(s) | Chattering |
| ✔ | Aural | Single click when | |
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| switching ON or OFF | |
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| Resistors | Cracks or |
| ✔ | Visual | Use Ohm meter to | |
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| discoloring |
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| check braking resistors | |
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| Cooling fan | Noise | ✔ |
| Power down, | Rotation must be | |
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| manually rotate | smooth | |
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| Dust | ✔ |
| Visual | Vacuum to clean | |
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| Overall | No odor, |
| ✔ | Visual | No abnormalities | |
Control |
| discoloring, |
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| corrosion |
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circuit |
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Capacitor | No leaks or | ✔ |
| Visual | Undistorted appearance | ||
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| deformation |
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Display | LEDs | Legibility | ✔ |
| Visual | All LED segments work | |
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Troubleshooting Maintenance and
Note 1: The life of a capacitor is affected by the ambient temperature. See “Capacitor Life Curve” on page
Note 2: The inverter must be cleaned periodically. If dust accumulates on the fan and heat sink, it can cause overheating of the inverter.