If the Digitest 3 does not deliver any power, it could be due to one of the following reasons:

• Starting the device – To turn on the unit, press the power button to select the desired speed. Then press and hold the power button during the whole test. Releasing the power button will interrupt the power discharge.
• Battery issues – Ensure the battery is fully charged and properly installed. Replace it if depleted.
• Probe or lead connections – Check that probe and lead wire are securely connected. Loose or damaged connections can prevent the unit from functioning.
• Device malfunction – If the batteries and connections are correct but the unit still does not discharge, there may be an internal fault. Contact Parkell technical support service or an authorized service provider for inspection or repair.