IMO HD2-3.7A-43 - 9.4 RTU command code and communication data; 9.4.1 Command code 03 H, reading N words (continuously up to 16 words)

HD2 Series Inverter Maintenance and Hardware Fault Diagnosis
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Cooling fan replacement:
 Read the safety precautions carefully and follow the instructions to perform
operations. Otherwise, physical injuries or damage to the device may be
caused.
1. Stop the device, disconnect the AC power supply, and wait for a time no shorter than the waiting
time designated on the inverter.
2. Open the cable clamp to lose the fan cable (for the 380V 1.5–30 kW inverter models, the middle
casing needs to be removed).
3. Remove the fan cable.
4. Remove the fan with a screwdriver.
5. Install a new fan in the inverter in the reverse steps. Assemble the inverter. Ensure that the air
direction of the fan is consistent with that of the inverter, as shown in the following figure.
Rotating direction
Air direction
Air
direction
Figure 8-1 Fan maintenance for 7.5 kW and higher inverter models
6. Power on the inverter.
8.4 Capacitor
8.4.1 Capacitor reforming
If the inverter has been left unused for a long time, you need to follow the instructions to reform the
DC bus capacitor before using it. The storage time is calculated from the date the inverter is
delivered.
Storage time
Operation principle
Less than 1 year
No charging operation is required.
1 to 2 years
The inverter needs to be powered on for 1 hour before the first running
command.
2 to 3 years
Use a voltage-controlled power supply to charge the inverter: