Specifications

GEMINI
2
Traffic Outstation Handbook
667/HB/32600/000 Page 137 Issue 11
Symptom
Possible Diagnosis
Action to Check Diagnosis
(a) Unit not operating
(continued)
Software not running
If the System LED is flashing and an error message is being continually output
on the handset, this indicates that an internal check has repeatedly failed.
Power down and power up the unit to cause a reset. If fault persists, replace
the processor board and then whole unit.
Expansion port failed
Check the Board address switches for all the I/O boards are set correctly, to
select that I/O board relative to its position in the stack (see section 5.2.1 on
page 70). If yes, replace the Processor board. If no, set the switches to the
correct setting.
(b )Input and Output
(I/O) board faults
Digital input failed
Monitor the relevant input(s) using the Handset code DIP (see section 13.4) or
use the MOVA commissioning screen. If, the indications are incorrect, replace
the relevant I/O cable and board. If, the indications are correct, replace the
processor board. If the fault persists, replace the unit.
Digital output failed
Monitor the relevant output(s) using the Handset codes SOB or SOP (see page
249) or use the MOVA commissioning screen. If the output does not function
as displayed, replace the relevant I/O cable and board. If the fault persists,
replace the unit.
Green State inputs
failed (OMCU only)
Monitor the relevant input(s) using the Handset code MSI (see section 13.4) for
correct operation. If, the indications are incorrect, replace the relevant I/O
board. If, the indications are correct, replace the processor board. If the fault
persists, replace the unit.
(continued overleaf)
Voltage Monitor input
failed (OMCU only)
Monitor the Voltage Monitor Transformer Analogue inputs using the Handset
code KAC (see section 13.5), for correct operation. Observe the handset
display and check that the varying reading is approximately between 650 to
800 for bright or 450 to 600 for dim (160V setting). If, the readings are
incorrect, replace the relevant I/O board. If, the readings are correct, replace
the processor board. If the fault persists, replace the unit.