-19-
No.EX##-OMN0011-B
Troubleshooting and Maintenance
○
Troubleshooting chart
When any malfunction is observed, it is recommended to perform the following troubleshooting.
Yes
No
SI unit
malfunction
SI unit
PWR LED OFF
All valves and
valve LEDs are
not operating
Refer to fault
No.1
SI unit
PWR (V) LED OFF
Group of valves not
working
Valves do not work
but valve LEDs are
operating
SI unit
L/A IN LED OFF
Refer to fault
No.2
Refer to fault
No.3
Refer to fault
No.6
Refer to fault
No.7
Refer to fault
No.8
SI unit
L/A IN LED
stay Green
Refer to fault
No.4
SI unit
RUN LED OFF
Refer to fault
No.5
