MANUAL P/N 900000106 REV A
31
7
Maintenance and Troubleshooting
There is no required preventive maintenance for the FTSU-100D. To troubleshoot the problems, refer to
Table 4
.
SYMPTOM
POTENTIAL CAUSE
CORRECTIVE ACTION
No LEDs
illuminate on
front panel
1.
There is no power.
2.
There is a blown fuse.
3.
There is a FTSU-100D power supply
failure.
1.
Verify that the AC power is available.
2.
Replace the fuse.
3.
Return unit to the factory.
Fault LED is
illuminated
1.
One of the output signals is outside
its allowable threshold values.
2.
One or both of the input signal sets
are faulty.
3.
PLL is not locked.
1.
Check alarm screen to verify cause of
fault.
2.
Check alarm screen to verify cause of
fault.
3.
Input signal is missing or out of range.
Switch to other input or
“ auto “.
Holdover LED is
illuminated
1.
Both input signals are missing.
2.
One input signal set is faulty and is
selected.
1.
Connect at least one good set of input
signals and ensure selector is set to
good set or “ auto “.
2.
Select other input set, or select
“ auto “.
No signal
outputs
1.
There is an internal failure.
1.
Return unit to the factory.
Table 4 Troubleshooting FTSU-100D Problems
