Shenzhen Hpmont Technology Co., Ltd.
Chapter 8 Troubleshooting and Maintenance
HD3N-L Series User Manual V1.0
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Periodical Maintenance
Customer should check HD3N-L every 3 to 6 months according to the actual environment so as to
avoid hidden problems and make sure the controller runs well for a long time.
General Inspection:
•
Check whether the screws of control terminals are loose. If so, tighten them with a screw driver.
•
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.
•
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 HD3N-L has already been conducted in the factory. Do not do the test again.
Otherwise, HD3N-L might be damaged.
2. If insulation test to the motor is necessary, it should be done after input terminals U/V/W of motor have
been detached from HD3N-L. Otherwise, HD3N-L 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.
Easily damaged
Cooling fan
Electrolytic capacitors
Life
60,000 hours
50,000 hours
Possible cause of
damages
Wear of the bearing, aging of the fan vanes
High ambient temperature, aging of
electrolyte and large pulse current induced
by rapid changing loads
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
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
Unwanted Controller Recycling
When disposing HD3N-L, pay attention to the following factors:
•
The capacitors may explode if they are burnt.
•
Poisonous gas may be generated when the plastic parts like front covers are burnt.
•
Disposing method: Dispose unwanted controllers as industrial waste.
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