7. MAINTENANCE AND TROUBLESHOOTING
7-2
7.2 How to Replace the Fuse
The optional AC/DC Power Supply Unit has fuses to protect the unit from overvoltage
(over-current) and internal faults. If the unit cannot be turned on, check if the fuse is
blown. If a fuse is blown, determine the cause before replacing the fuse.
Fuses
7.3 Communication Unit LED Lamps
The Communication Unit LED lamps indicate the status of the Communication Unit
and Antenna Unit. See the following table:
Communication Unit LED lamp status and behavior
Type Part No. Remarks
S-33-204900-063 001-559-380 6.3A, For AC power supply only, glass tube.
S-33-205376-020 001-559-390 20A, Battery power supply only, blade.
Status Power LED Terminal LED Antenna LED
Soon after power on On/Green Off Off
Start-up (first half) On/Green Flashes fast
(approx. 0.3 secs, Green)
Off
Start-up (last half) On/Green Flashes fast
(approx. 0.3 secs, Green)
Flashes fast
(approx. 0.3 secs, Green)
Searching for satellite On/Green Flashes slowly
(approx. 2 secs, Green)
Flashes slowly
(approx. 2 secs, Green)
Tracking satellite On/Green Flashes slowly
(approx. 2 secs, Green)
On/Green
Registering to satellite On/Green Flashes slowly
(approx. 2 secs, Green)
On/Green
Ready to use On/Green On/Green On/Green
Shutting down
process
On/Green Flashes fast
(approx. 0.3 secs, Yellow)
Off
Error On/Green Flashes slowly
(approx. 2 secs, Yellow)
Flashes slowly
(approx. 2 secs, Yellow)
WARNING
Use the proper fuse.
Use of a wrong fuse can damage the
equipment or cause fire.
For power
For Communication Unit
For Antenna Unit
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