Chapter 8 Troubleshooting and Maintenance Shenzhen Hpmont Technology Co., Ltd.
―80― HD3L Series Controller User Manual
8.2 Maintenance
Factors such as ambient temperature, humidity, PH, dust, oscillation, internal component aging, wear
and tear will give rise to the occurrence of potential faults. Therefore, it is necessary to conduct daily
maintenance to the controller.
• If HD3L has been transported for a long distance, check whether the components of the controller
are complete and the screws are well tightened.
• Periodically clean the dust inside HD3L and check whether the screws are loose.
• Only a trained and qualified professional person can maintain the controller.
• Maintenance personnel should take off all metal jewellery before carrying out maintenance or internal
measurements in the controller. Suitable clothes and tools must be used.
• High voltage exists when the controller is powered up or running.
• Checking and maintaining can only be done after AC power of HD3L is cut off and wait for at least 10 minutes. The
cover maintenance can only be done after ensured that the charge indicator inside the controller and the
indicators on the keypad are off and the voltage between power terminals (+) and (-) is below 36V.
• For HD3L with more than 2 years storage, please use voltage regulator to increase the input voltage gradually.
• Do not leave metal parts like screws or pads inside the controller.
• Do not make modification on the inside of controller without instruction from the supplier.
• There are IC components inside the controller, which are sensitive to static electricity. Directly touch the
components on the PCB board is forbidden.
Daily Maintenance
HD3L must be operated in specified environment (refer to section 3.2, on page11). Besides, some
unexpected accidents may occur during running.
Therefore maintain it according to table below. To prolong the lifetime of HD3L, keep good operating
environment, record the daily run data and detect any abnormal behavior.
Table 8-2 Daily checking items
Items Content Criteria
Running
environment
Temperature and humidity
-10 - +40
℃
, derating at 40 - 50
℃
Less than 95%RH, non-condensing
Dust and water dripping No conductive dust accumulating, no water dripping
Gas No strange smell
HD3L
Oscillation and heating Stable oscillation and proper temperature
Noise No abnormal sound
Motor
Heating No overheat
Noise Low and regular noise
Running status
parameters
Output current Within rated range
Output voltage Within rated range
Danger
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