Fujitsu AUXB04GALH Service Manual page 156

Signal Amplifier (UTY-VSGXZ1 )
Troubl e shooting 78
Error Contents :
Communication Error
Details :
Condition of occurrence : Network cable defective. External noise is applied.
Release condition : Network cable
Overlapping of Signal Amplifier has been corrected. System design is normal.
Cause 1 :
Network cable installation is defective or open.
Check Network cable installation.
Cause 2 : External noise
Remove external noise around Signal Amplifier or
Network cable. (Keep enough distance)
Cause 3 :
Overlapped address of Signal Amplifier.
Set up address again which does not overlap on system.
After set up again, reset the power supply.
Symptom :
Error code does not appear [ _ ]
Communication error occurs at connected equipment side.
Overlapping of Signal Amplifier address setting. System design mistake.
is connected. External noise is removed.
OK
OK
Cause 4 : System Design mistake
Check following items.(Refer to Installation Manual)
(1) Installation location of Terminal Resistor.
(Only 1 location on NS*)
(2) Cable length. (Within 500m maximum on NS*)
(3) Number of units connected
(Up to 64 units maximum on NS*)
(4) Communication cable specification.
(Use specified type.)
(5) Number of Signal Amplifier installed.
(Up to 8 units max. on system)
(6) Network cable shall not be connected in loop.
OK
04-86
*NS : Network Segment