Chapter 8 Maintenance and repair
143
Ch
ap
ter
8
Name of Parts
Standard life time
Cooling fan
1 to 3 years
Filter capacitor
4 to 5 years
Printed circuit board(PCB)
5 to 8 years
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 rebuild
If the frequency inverter hasn’t been used for a long time, before using it please rebuild the DC
bus capacitor according to the instruction. The storage time is counted from delivery.
Time
Operation instruction
Less than 1 year
No need to recharge
Between 1~2 years
Before the first time to use, the frequency inverter must be recharged for
one hour
Between
2~3years
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,
More than 3 years
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+ connects R, N connects T)
Because it is the same rectifier, all the DC bus capacitors will be charged at the same time.
You should make sure the voltage (380v) of high voltage frequency inverter, because when the
capacitor is being charged it almost doesn’t need any current, so small capacitor is enough (2A)
The instruction of using resisitor (incandescent light bulb) to charge frequency inverters:
When charging 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.
380V drive system: use 1K/100W resistor. When the power is less than 380v, 100w incandescent
lights is also suitable. When using incandescent lights, the lights will extinct or become very weak.
