Shenzhen Hpmont Technology Co., Ltd Chapter 9 Maintenance
HD5L Series Controller User Manual ―105―
9.3 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. The 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 overcurrent 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.
9.4 Unwanted Controller Recycling
When disposing the controller, please 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: Please dispose unwanted controllers as industrial waste.
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