Salicru CV50-008-4F User Manual page 106

8.8.2.1 Replacing the cooling fan
 Read and follow the instructions in chapter Safety Precautions. Ignoring the
instructions would cause physical injury or death, or damage to the equipment.
1. Stop the inverter and disconnect it from the AC power source and wait for at least the time designated on
the inverter.
2. Lever the fan holder off the drive frame with a screwdriver and lift the hinged fan holder slightly upward from
its front edge.
3. Loose the fan cable from the clip.
4. Disconnect the fan cable.
5. Remove the fan holder from the hinges.
6. Install the new fan holder including the fan in reverse order. Keep the wind direction of the fan consistent
with that of the inverter, as shown below:
7. Restore power.
8.8.3 Capacitors
8.8.3.1 Reforming the capacitors
The DC bus capacitors must be reformed according to the operation instruction if the inverter has been stored
for a long time. The storing time is counted from the producing date other than the delivery data which has
been marked in the serial number of the inverter.
Time
Storing time less than 1
year
Storing time 1-2 years
Storing time 2-3 years
Storing time more than 3
years
The method of using power surge to charge the inverter:
The right selection of power surge depends on the supply power of the inverter. For the three-phase 400V
inverters, 400V/2A power surge can be applied to it.
The small capacitor power (2A is enough) can be used because the capacitor nearly does not need current
when charging.
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Fan maintenance diagram for inverters
Operation without charging
Connect with the power for 1 hour before first ON command
Use power surge to charge for the inverter
• Add 25% rated voltage for 30 minutes
• Add 50% rated voltage for 30 minutes
• Add 75% rated voltage for 30 minutes
• Add 100% rated voltage for 30 minutes
Use power surge to charge for the inverter
• Add 25% rated voltage for 2 hours
• Add 50% rated voltage for 2 hours
• Add 75% rated voltage for 2 hours
• Add 100% rated voltage for 2 hours
Operational principle
Fault Tracking