Chapter 8 Maintenance and repair
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8-2.Parts for regular replacement
To ensure the reliable operation of inverter, in addition to regular care and maintenance, some
internal mechanical wear parts(including cooling fan, filtering capacitor of main circuit for energy
storage and exchange, and printed circuit board) shall be regularly replaced. Use and replacement
for such parts shall follow the provisions of below table, also depend on the specific application
environment, load and current status of inverter.
Printed circuit board(PCB)
8-3.Storage
The following actions must be taken if the inverter is not put into use immediately(temporary
or long-term storage) after purchasing:
※ It should be store at a well-ventilated site without damp, dust or metal dust, and the ambient
temperature complies with the range stipulated by standard specification.
※
Voltage
withstand test can not be arbitrarily implemented, it will reduce the life of inverter.
Insulation test can be made with the 500-volt megger before using, the insulation resistance
shall not be less than 4MΩ.
8-4.Capacitor
8-4-1 Capacitor rebuilt
If the frequency inverter hasn’t been used for a long time, before using it please rebuilt the DC
bus capacitor according the instruction. The storage time is counted from delivery.
Before the first time to use, the frequency inverter must be recharged
for one hour
Use adjustable power to charge the frequency inverter:
--25% rated power 30 minutes,
-- 50% rated power 30minutes,
-- 75% rated power 30minutes,
--Last 100% rated power 30minutes,
Use adjustable power to charge the frequency inverter:
--25% rated power 2hours,
--50% rated power 2 hours,
-- 75% rated power 2hours,
-- Last 100% rated power 2hours.
Instruction of using adjustable power to charge the frequency inverter:
The adjustable power is decided by the frequency inverter input power, for the single phase/3
phase 220v frequency inverter, we use 220v AC/2A Regulator. Both single phase and three phase
frequency inverter can be charged by single phase Power Surge(L+ connect R,N connects T)
Because it is the same rectifier，so all the DC bus capacitor will be charged at the same time.
You should make sure the voltage(380v) of high voltage frequency inverter, because when the
capacitor being charged it almost doesn’t need any current, so small capacitor is enough(2A)
The instruction of using resistor ( incandescent lights) to charge frequency inverters:
When charge the DC bus capacitor of drive system by connecting power directly, then the
time should not be less than 60 minutes. The operation should be carried on under the condition of
normal temperature and without load, and moreover ,should be added resistor in the power supply
cycle.
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