Suzhou Monarch Control Technology MCTC-CTB-A, User Manual, Page: 27 / 183

NICE3000 User Manual Product Information
27
2.5 Daily Maintenance of Controller
Since the influence of ambient temperature, humidity, dust, and vibration, the components in
controller may become aging and wearing, which will give rise to the occurrence of potential
faults and reduce the life of controller. Therefore, it is quite necessary to do the work of daily
maintenance of controller.
The filter capacitor still has high voltage after the power supply to the controller is switched off, so
do not maintain or repair the controller until the bus voltage measured after 2 or 3 minutes with the
multi-meter. The voltage must be lower than 36V.
2.5.1 Daily Maintenance
Daily checking items: 1)
Check if there is any abnormal noise during the running of motor; a)
Check if there is any vibration of motor ; b)
Check if the installation environment of controller changes ; c)
Check if the cooling fan of controller works normally ; d)
Check if the controller is over heated. e)
Daily Cleaning: 2)
Keep the controller in a clean status; a)
Clean the dust from the controller and prevent the dust especially the metal powder from b)
entering the controller;
Clean the oil dirt in the cooling fan of the controller. c)
2.5.2 Periodical Checking
Periodically check the places that are hardly checked during the running.
Periodical Checking Items 1)
Check the ventilation channels and clean them periodically; b)
Check if the screws are loose; c)
Check if the controller is rusted; d)
Check if the input / output terminals has scratch marks; e)
Check the insulating in main circuit. f)
Note: Insulation test (use 500V Mega-Ohm-Meter) should be done separately after
disconnecting the input power cables from the controller; or else, the controller will be
damaged. Do not use the Mega-Ohm-Meter to test the insulation of control circuits. Dielectric
strength test had been done at factory. Therefore, user need not do this test again.