Power Supply Error; Communication Error - Fujitsu Airstage V-II Service Manual

2. Signal Amplifier (UTY-VSGX)
Trouble shooting 73
Error Contents :

Power Supply Error

Details :
Condition of occurrence : Normal power is not supplied. 7 segment indicator is defective.
Release condition : Normal power is supplied. 7 segment indicator is normal.
Cause 1 :
Power supply cable installation is defective or open.
Check following installation and reset the power supply.
(1) Installation of power cable on power supply terminal.
(2) Connection between Power PCB and Terminal.
(3) Connector condition between power PCB and Main PCB.
Trouble shooting 74
Error Contents :

Communication Error

Details :
Condition of occurrence : Network cable defective. External noise is applied.
Overlapping of Signal Amplifier address setting. System design mistake.
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 :
No display
Symptom :
Error code does not appear [ _ ]
Communication error occurs at connected equipment side.
is connected. External noise is removed.
OK
OK
OK
Cause 2 : Signal Amplifier is defective.
If normal voltage (220V) is applied to power supply
terminal of Signal Amplifier,
PCB. Proceed as follows.
Replace Signal Amplifier.
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
04-77
AC
there is a possibility of defective
*NS : Network Segment