1. Product Overview
This document provides essential instructions for the safe and effective use of the Hitachi Stick Cleaner AC Adapter, model PVA-04. This adapter is designed as a replacement or spare power supply unit for specific Hitachi stick cleaner models, converting AC power to the DC power required for battery charging.
1.1 Compatible Models
- PV-BFL1
- PV-BHL1000J, PV-BHL1000J1, PV-BHL2000J, PV-BHL3000J
- PV-BKL11G
- PV-BL10G, PV-BL1A1, PV-BL1H, PV-BL1J, PV-BL20G, PV-BL2H, PV-BL30E8, PV-BL3J
- PVA-02, PVA-04
1.2 Package Contents
- 1 x Hitachi Stick Cleaner AC Adapter PVA-04

Image 1: Front view of the Hitachi PVA-04 AC adapter. The label displays input (AC100V 50-60Hz 0.5A) and output (DC21.5V 0.9A) specifications, along with safety icons and warnings in Japanese. The attached cable with its DC plug is visible on the right.
2. Important Safety Instructions
Please read and understand all safety information before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Do not use if damaged: Inspect the adapter and its cable for any signs of damage (e.g., frayed wires, cracked casing) before each use. Discontinue use immediately if damage is found.
- Avoid foreign objects: Never insert metal objects or pins into the output terminal of the adapter. This can cause electric shock, short circuits, or damage to the device.
- Read cleaner manual: Always refer to the instruction manual provided with your Hitachi stick cleaner for specific charging procedures and safety guidelines related to the cleaner itself.
- Intended use only: Use this adapter exclusively for its intended purpose with compatible Hitachi stick cleaners. Do not use it for other electronic devices.
- Indoor use only: This adapter is designed for indoor use only. Do not expose it to rain, moisture, high humidity, or extreme temperatures.
- Ventilation: Ensure the adapter is used in a well-ventilated area. Do not cover it or place it in confined spaces during operation.
- Children and pets: Keep the adapter out of reach of children and pets.
3. Setup Guide
3.1 Connecting the AC Adapter
- Ensure your Hitachi stick cleaner is turned off before connecting the adapter.
- Locate the charging port on your Hitachi stick cleaner.
- Insert the DC output plug of the PVA-04 adapter firmly into the cleaner's charging port.
- Plug the AC input plug of the adapter into a standard wall outlet (AC100V, 50-60Hz).
- Verify that the charging indicator on your stick cleaner (if present) illuminates, indicating a proper connection and that charging has begun.

Image 2: Top-down view of the Hitachi PVA-04 AC adapter, showing the compact design of the adapter body and the attached power cable with its DC output plug.
4. Operating Instructions
4.1 Charging the Stick Cleaner
- Once properly connected as described in the Setup Guide, the adapter will automatically begin charging the stick cleaner's battery.
- Charging time varies depending on the specific Hitachi stick cleaner model and the current battery level. Refer to your stick cleaner's own instruction manual for detailed charging duration information.
- Disconnect the adapter from the wall outlet and the cleaner once charging is complete, or if the cleaner will not be used for an extended period.
5. Care and Maintenance
5.1 Cleaning the Adapter
- Before cleaning, always unplug the adapter from both the wall outlet and the stick cleaner.
- Wipe the exterior of the adapter with a dry, soft cloth. Do not use liquid cleaners, solvents, or abrasive materials, as these can damage the casing or internal components.
5.2 Storage
- Store the adapter in a cool, dry place, away from direct sunlight, high temperatures, and excessive moisture.
- Avoid tightly coiling the cable or placing heavy objects on it, which can cause damage over time.
5.3 Inspection
- Regularly inspect the adapter body, cable, and plugs for any signs of wear, cuts, bends, or other damage.
- If any damage is observed, discontinue use immediately and replace the adapter to prevent potential hazards.
6. Troubleshooting
6.1 No Power / Not Charging
- Check connections: Ensure the adapter is securely plugged into both the wall outlet and the stick cleaner's charging port.
- Test outlet: Verify that the wall outlet is functional by testing it with another electrical device.
- Inspect adapter: Carefully inspect the adapter cable and plugs for any visible damage. If damaged, the adapter must be replaced.
- Compatibility: Confirm that your stick cleaner model is listed as compatible with the PVA-04 adapter.
6.2 Overheating
- It is normal for the adapter to feel slightly warm during operation, especially during prolonged charging.
- If the adapter becomes excessively hot to the touch, disconnect it immediately from both the wall outlet and the cleaner. Allow it to cool down completely.
- Ensure the adapter is used in a well-ventilated area and not covered by cloths or other materials.
- If excessive overheating persists after taking these steps, discontinue use and contact customer support.
7. Product Specifications
| Model Number | PVA-04 |
| Input | AC100V, 50-60Hz, 0.5A |
| Output | DC21.5V, 0.9A |
| Operating Temperature | ta=40°C |
| IP Rating | IP20 |
| Dimensions (L x W x H) | 15.1 x 9 x 5.4 cm |
| Weight | 140 g |
| Country of Origin | Made in China |
8. Warranty and Support
Specific warranty information for this replacement part is not provided in the product data. Please refer to your purchase documentation or contact the retailer from whom you purchased this AC adapter for details regarding warranty coverage and terms.
For technical support, troubleshooting assistance beyond what is covered in this manual, or inquiries about replacement parts, please contact the retailer or Hitachi customer service in your region.