88 Chapter 7 Maintenance
EV2000 Series Universal Variable Speed Drive User Manual
Chapter 7 Maintenance
Many factors such as ambient temperature, humidity, dust, vibration, internal component aging, wear and tear will give
rise to the occurrence of potential faults. Therefore, it is necessary to conduct routine maintenance to the drives.
Notes:
As safety precautions, before carrying out check and maintenance of the drive, please ensure that :
The drive has been switched off;
The charging LED lamp inside the drive is off.
Use a volt-meter to test the voltage between terminals (+) and (-) and the voltage should be below 36V.
7.1 Daily Maintenance
The drive must be operated in the environment specified in the Section 2.1. Besides, some unexpected accidents may
occur during operation. You should maintain the drive conditions according to the table below, record the operation data,
and find out problem in the early stage.
Table 7-1 Daily checking items
Items
Instructions
Criterion
Items Cycle Checking methods
Operating
environment
Temperature and
humidity
Any time
Thermometer and
hygrometer
-10
℃~+40℃,
derating at 40
℃~50℃
Dust and water dripping Visual inspection No water dripping
Gas Visual inspection No strange smell
Drive
Vibration and heating
Any time
Touch the case
Stable vibration and proper
temperature
Noise Listen No abnormal sound
Motor
Heating
Any time
Touch by hand No overheat
Noise Listen Low and regular noise
Operating status
parameters
Output current
Any time
Current meter Within rated range
Output voltage Volt-meter Within rated range
Internal temperature Thermometer
Temperature rise is smaller
than 35℃
7.2 Periodical Maintenance
Customer should check the drive every 3 months or 6
months according to the actual environment.
Notes:
1. Only trained personnel can dismantle the drive to replace
or repair components;
2. Don't leave metal parts like screws or pads inside the
drive; otherwise the equipment may be damaged.
General Inspection:
1. Check whether the screws of control terminals are
loose. If so, tighten them with a screwdriver;
2. Check whether the main circuit terminals are properly
connected; whether the mains cables are over heated;
3. Check whether the power cables and control cables
are damaged, check especially for any wear on the
cable tube;
4. Check whether the insulating tapes around the cable
lugs are stripped;
5. Clean the dust on PCBs and air ducts with a vacuum
cleaner;
6. For drives that have been stored for a long time, it
must be powered on every 2 years. When supplying AC
power to the drive, use a voltage regulator to raise the
input voltage to rated input voltage gradually. The drive
should be powered for 5 hours without load.
7. Before performing insulation tests, all main circuit
input/output terminals should be short-circuited with
conductors. Then proceed insulation test to the ground.
Insulation test of single main circuit terminal to ground is
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