User Manual for HiKOKI DH 18DPA Cordless Rotary Hammer

Quick guide from the manual

The HiKOKI DH 18DPA is a cordless rotary hammer designed for drilling in concrete, tile, steel, and wood. It features a Reactive Force Control (RFC) system to reduce jerking and an auto-stop function for consistent drilling. Always ensure the battery is charged and the tool is switched off before performing any adjustments or maintenance.

Product Overview

The tool consists of a main body with a switch trigger, change lever for mode selection, side handle, and a display panel. The battery is removable and features a remaining capacity indicator. The tool uses SDS-plus shank drill bits.

Safety Warnings

• Personal Safety: Always wear eye protection and ear protectors. Keep children and bystanders away.
• Battery Safety: Charge only with specified chargers. Do not short-circuit terminals. Keep battery away from metal objects.
• Operation Safety: Hold the tool firmly by the body and side handles. Do not touch the bit immediately after operation as it becomes very hot.
• Environment: Do not operate in explosive atmospheres. Ensure the work area is clean and well-lit.

Battery and Charging

Charge the battery at an ambient temperature between 0°C and 40°C. The pilot lamp on the charger indicates the status:

• Blinking Red (1s interval): Before charging or charging complete.
• Continuous Red: Charging in progress.
• Blinking Red (0.5s interval): Overheat standby.
• Flickering Red (0.1s interval): Malfunction.

Operation

Mode Selection

Use the change lever to switch between modes:

• Rotation + Hammering: For drilling in concrete or tile.
• Rotation only: For drilling in steel or wood (requires optional drill chuck and adapter).

Auto Stop Function

This function stores the time taken for a drilling operation to allow for consistent repetitive drilling. Press the changeover switch for over two seconds to enter memory mode, then perform the drilling operation. The tool will record the time and stop automatically in subsequent operations.

Reactive Force Control (RFC)

If the bit is suddenly overburdened, the RFC feature stops the motor to reduce jerking. If this occurs, the RFC indicator lamp will blink. Release the switch, remove the cause of the overburden, and resume operation.

Maintenance and Inspection

• Cleaning: Regularly clean the battery installation compartment and terminals of concrete dust using a dry cloth.
• Grease: The tool uses low-viscosity grease. If grease leaks from loosened screws, contact an authorized service center for replacement.
• Storage: Store the tool in a place with a temperature below 40°C, out of reach of children. Ensure the battery is fully charged before long-term storage.

Troubleshooting

If the tool does not operate normally, check the following:

• Tool doesn't run: Check battery charge and ensure it is securely attached.
• Tool suddenly stopped: Check for overload or if RFC was activated. Let the battery cool if overheated.
• Drill bits fall off: Ensure the correct SDS-plus shank bit is used and properly latched.