75
8.2
Periodic Maintenance
You should check the inverter every 3 months or 6 months according to
the actual environment.
Note
：
1. Only trained personnel can dismantle the inverters for repairing or
device replacement;
2. Don't leave metal parts like screws or pads in the inverter, otherwise
the equipment may be damaged.
8.3
General Inspection:
1
．
Whether screws of control terminals are loose. If so, tighten them
with a screwinverterr;
2
．
Whether the main circuit terminals are properly connected; whether
the mains cables are over heated;
；
3
．
Whether the power cables and control cables are damaged, check
especially for any wear on the cable insulation;
4
．
Whether the insulating tapes around the cable lugs are stripped;
5
．
Clean the dust on FCBs and air ducts with a vacuum cleaner;
6
．
For inverters that have been stored for a long time, it must be
powered on every 2 years. When supplying AC power to the inverter,
use a voltage regulator to raise the input voltage to rated input voltage
gradually. The inverter should be poweredfor 5 hours without driving a
motor load.
7
．
Before performing insulation tests, all main circuit input/output
terminals should be short-circuited with conductors. Then precede
insulation test to the ground. Insulation test of single main circuit
terminal to ground is prohibited; the inverter can be damaged by such a
test. Please use a 500V Mega-Ohm-Meter.
8
．
If performing insulation test to the motor, be sure to disconnect the
cables between the inverter and it. Otherwise, the inverter might be
damaged.
