D20x22 Series II Navigator HDD Electronic Controller 21-1
Section 21: Electronic Controller
This section shows locations and identification of control keys and indicator lights on the electronic controller, as
well as symbols used on the display screen. Refer to Machine Controls for information on controls and lights
within each function. Refer to page 20-1.
CONTROLLER KEYS
(1) Strike Alert Test Key
Press to test voltage and current sensing circuits.
Alarm on drill unit must sound.
(2) Strike Alert Alarm Cancel Key
Press after Strike Alert alarm sounds and the cause has
been corrected.
(3) Diesel Particulate Filter Key
(Tier 4 Interim/Stage IIIB engine only)
Soot level indicates filter regeneration needed.
Refer to “DPF Menu (Tier 4 Interim/Stage IIIB Engine
Only),” page 21-16.
(4) Manual Pressure Limit Key
Activates and toggles between Thrust/Pullback Pressure
limit, Rotation Pressure limit, and no pressure limits. Use
Trim Switch (page 20-21) to adjust limits.
(5) R.A.T.T. Mode Key
Activates R.A.T.T. Oscillation mode and then toggles
between Oscillation mode and Straight Drilling mode
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