EXFO PPM-350C PON Power Meter - Manual (Page 36)

Troubleshooting 30
10 Troubleshooting
Solving Common Problems
Problem Possible Cause Solution
One of the LEDs remains
off.
OR
One of the LEDs remains
green or red even if the
status is Warning. LED is burnt.
Verify LEDs (see Verifying
the LEDs and LCD on
page 29). Contact EXFO.
Pressing the button
does not activate Pass/Fail
mode.

Unit is currently
nulling offsets,
verifying thresholds or
verifying LEDs and
LCD.

Let the unit complete
the operation.
If the unit was
verifying LEDs and
LCD, press any key to
return to your previous
mode (Pass/Fail or
Normal).

The current threshold
set contains an
unusable (corrupted)
value.

See Error Codes and
Descriptions on
page 31.

No threshold sets have
been defined.

See Error Codes and
Descriptions on
page 31.
P/F
mode