Monarch NICE 5000, User Manual

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NICE5000 User Manual 8 Troubleshooting
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Note
Before measuring the insulating resistance with megameter (500 VDC megameter
recommended), disconnect the main circuit from the controller. Do not use the
insulating resistance meter to test the insulation of the control circuit. The high voltage
test need not be performed again because it has been completed before delivery.
8.1.3 Replacement of Vulnerable Components
Vulnerable components of the controller include the cooling fan and filter electrolytic
capacitor. Their service life is related to the operating environment and maintenance.
The service life of the two components is listed in the following table.
Table 8-1 Service life of cooling fan and filter electrolytic capacitor
Component Service Life
Possible Damage
Cause
Judging Criteria
Fan 2 to 3 years
• Bearing worn
• Blade aging
• Check whether there is crack on the
blade.
• Check whether there is abnormal
vibration noise upon startup.
Electrolytic
capacitor
4 to 5 years
• Input power supply
in poor quality
• High ambient
temperature
• Frequent load
jumping
• Electrolytic aging
• Check whether there is liquid leakage.
• Check whether the safety valve has
projected.
• Measure the static capacitance.
• Measure the insulating resistance.
The service life is obtained based on the following conditions:
Ambient temperature: average 30°C per year
Load rate: below 80%
Running time: less than 20 hours per day
8.1.4 Storage of the Controller
For storage of the controller, pay attention to the following two aspects:
1. Pack the controller with the original packing box provided by Monarch.
2. Long-term storage degrades the electrolytic capacitor. Thus, the controller must be
energized once every 2 years, each time lasting at least 5 hours. The input voltage must
be increased slowly to the rated value with the regulator.
8.2 Description of Fault Levels
The NICE5000 has almost 60 pieces of alarm information and protective functions. It
monitors various input signals, running conditions and feedback signals. If a fault occurs, the
system implements the relevant protective function and displays the fault code.