Shenzhen Hpmont Technology Co., Ltd. Chapter 8 Troubleshooting and Maintenance
HD5L-PLUS Series User Manual V1.0 91
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 HD5L-PLUS has been transported for a long distance, check whether the components of HD5L-
PLUS are complete and the screws are well tightened.
• Periodically clean the dust inside HD5L-PLUS 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 HD5L-PLUS is cut off and wait for at least 10
minutes.
The cover maintenance can only be done after ensured that the charge indicator inside HD5L-PLUS and the
indicators on the keypad are off and the voltage between power terminals (+) and (-) is below 36V.
• For HD5L-PLUS 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 HD5L-PLUS.
• 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 stationary electricity. Directly touch the
components on the PCB board is forbidden.
Daily Maintenance
HD5L-PLUS must be operated in the specified environment (refer to section 3.2, on page 11).
Please carry out daily maintenance according to Table 8-2, so as to find abnormal phenomena in time
and prolong the service life of HD5L-PLUS.
Table 8-2 Daily checking items
Items Content Criteria
Running
environment
Temperature and humidity
-10 - +40°C, derating at 40 - 50°C
Less than 95%RH, non-condensing
Dust and water dripping No conductive dust accumulating, no water dripping
Gas No strange smell
HD5L-PLUS
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