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6
SERVICE
6.1 Troubleshooting
The Troubleshooting Guide is arranged to help you
evaluate the reasons for TTRU3 malfunction. The
possible test set malfunctions and causes are listed
below. Electronic circuit repairs should not be at-
tempted in the field. Refer to Repair section.
TTRU3 does not turn on
• Check that the power cord is fully inserted into
the TTRU3.
• Check that the power source is outputting volt-
age at acceptable levels and frequency.
• Check that the power cord is fully inserted into
the source.
• Check that the power switch is in the correct
position ( I ).
• Set the power switch to off ( O )
Wait 30 seconds
Set the power switch to on ( I )
• Try another power cord
Self Check
• Connect the leads as described below
H1 to X1
H2 to X2
H3 to X3
H0 to X0
• Select Dd0, Yy0, or YNyn0 and perform a test
• Verify ratio between 1.0005 and 0.9995
Contact your IT department for primary
assistance when connecting any device to
your PC.
TTRU3 Reports test failed, but still provides data
• Check lead connections. Reference Nameplate
to ensure leads are connected to the correct
bushing.
Printer not working
• Check battery is inserted into printer
• Charge printer battery using supplied charger
• Check printer paper is inserted properly
• Check USB cable is plugged into printer
• Check USB cable is plugged into TTRU3 USB port
• Check printer is turned on by holding power
button
• Try other USB ports
OLTC moving in wrong direction
• Check the OLTC wiring diagram and ensure
leads are connected to correct terminals.
Cannot connect TTRU3 to PC
• Check USB cable is fully inserted into the TTRU3
• Check USB cable is fully inserted into PC
• Check the TTRU3 is powered on
• Check TTRU3 SW is installed
• Check TTRU3 is running
• Move USB cable to another USB port on your PC
• Try another USB Cable
• Try another PC
54 TTRU3 User Manual www.megger.com
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