5707070-A Troubleshooting and Customer Support 3-3
Sono-Trak™ Doppler Ultrasonic Flow Meter
STATUS OF ECHO LED: OFF
Is the Echo LED on steady?
4
Yes. If the Echo LED is on steady or is flashing, continue on to “Status of Echo
LED: Flashing” on page 3-5.
4
No. If the Echo LED is off, troubleshoot using Table 3-2 below.
Note: See “Additional Troubleshooting Information” on page 3-9 for additional
information about the Echo LED indicator.
Is the AC/ BATTERY power
switch set correctly?
Make sure the AC/ BATTERY switch is in the proper
position for your system input power:
• AC = AC input power
• BATTERY = DC input (battery) power
See “To Connect Input Power to the Electronics
Enclosure:” on page 2-13 and Figure 2-8 on page 2-14 for
the location of the switch.
Is there a LOW BAT flashing in
the display?
If you are switching from BATTERY (DC) power to AC
power and the A/C Select switch selection does not match
your incoming power, you may see a LOW BAT warning
in the front panel display. Adjust the A/C Select switch to
the correct incoming power level (115 VAC or 230 VAC)
and this warning should disappear.
If you are using the battery (DC power) to power the unit,
your battery may be low. See “Portable Battery Operation
(Portable Units Only)” on page 2-25.
Is there is a blown input power
fuse?
Check to see if all fuses on the processor board are good.
See Figure 2-8 on page 2-14 for fuse block location on the
processor board.
Table 3-1. Status of unit power troubleshooting checklist
Question/ Possible Cause Corrective Action
