Shenzhen Hpmont Technology Co., Ltd.
Chapter 8 Troubleshooting and Maintenance
HD5L Series Controller User Manual V1.4
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Periodical Maintenance
Customer should check HD5L in every 3 to 6 months according to the actual environment so as to
avoid hidden problems and make sure HD5L runs well for a long time.
General Inspection:
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Check whether the screws of control terminals are loose. If so, tighten them with a screw driver;
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Check whether the main circuit terminals are properly connected; whether the copper bar and
mains cables are overheated;
•
Check whether the power cables and control cables are damaged, check especially for any wear on
the cable tube;
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Check whether the insulating tapes around the cable lugs are stripped, and for signs of overheating
near terminations;
•
Clean the dust on PCBs and air ducts with a vacuum cleaner.
Note:
1. Dielectric strength test of the controller has already been conducted in the factory. Do not do the test
again. Otherwise, the controller might be damaged.
2. If insulation test to the motor is necessary, it should be done after the input terminals U/V/W of motor
have been detached from HD5L. Otherwise, HD5L will be damaged.
3. For controllers that have been stored for a long time, they must be powered up every 2 years. When
supplying AC power to the controller, use a voltage regulator to gradually raise the input voltage to rated
input voltage at least 5 hours.
Replacing Damaged Parts
The components that are easily damaged are: cooling fan and electrolytic capacitors of filters. Their
lifetime depends largely on their application environment and preservation. Users can decide the time
when the components should be replaced according to their service time.
Cooling fan
Life: 60,000 hours.
Possible cause of damages: Wear of the bearing, aging of the fan vanes.
Criteria: After the controller is switched off, check if the abnormal conditions such as crack existing on
fan vanes and other parts. When the controller is switched on, check if controller running is normal,
and check if there is any abnormal oscillation.
Electrolytic capacitors
Life: 50,000 hours
Possible cause of damages: High ambient temperature, aging of electrolyte and large pulse current
induced by rapid changing loads.
Criteria: Check if frequent over-current or overvoltage failures occur during controller start-up with
load. Check if there is any leakage of liquids. Check if the safety valve protrudes. Measure the static
capacitance and insulation resistance.
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