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9. Troubleshooting
Fault
1. The tool can't be switched on.
2. No distances displayed by the tool.
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3. Frequent error messages or the tool doesn't measure.
4. Temperature indicator - symbol in the display
5. Unfavorable signal conditions - symbol in the display
6. General hardware fault - symbol in the display
Possible cause
1.1 The batteries are exhausted.
1.2 Incorrect battery polarity.
1.3 The button is faulty.
2.1 "Measure" button was not pressed.
2.2 Faulty display.
3.1 The target surface is too brightly lit by the sun.
3.2 The target surface is too shiny.
3.3 The target surface is too dark.
3.4 Bright sunlight towards the tool.
4.1 Temperature too high (>+122 °F)
4.2 Temperature too low (<+ 14 °F)
5.1 Insufficient reflected laser light.
6.1 Hardware fault
Remedy
1.1 Replace the batteries.
1.2 Insert the batteries correctly and close the battery
compartment cover.
1.3 Return the tool to Hilti for repair.
2.1 Press the "Measure" button.
2.2 Return the tool to Hilti for repair.
3.1 Measure from the other direction – sun from behind.
3.2 Take measurements from less shiny surfaces.
3.3 Use the PDA 50 / PDA 51 / PDA 52 target plate.
3.4 Use the PDA 50 / PDA 51 / PDA 52 target plate.
4.1 Allow the tool to cool down.
4.2 Allow the tool to warm up.
5.1 Observe the minimum measuring distance
(>9.84 inches from the front edge of the tool); clean
the lenses; take the measurement from a different
surface or use a target plate.
6.1 Switch the tool off and on again. If the fault persists,
contact Hilti Service.
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