HD-3: Disabling the Auto-Off feature
The HD-3 contains an auto-off feature that turns off the module's power after not being used for specified amount of time. Here's how to disable this feature.
1. Turn on the HD-3.
2. Press and hold the VARIATION button until "Select Edit No." appears in the display.
3. Continue to hold VARIATION and press the "4/HEAVY" button.
4. Release VARIATION and then press the down arrow button to select "Off."
5. Press and release VARIATION once again to store the new setting.