Error message Error type Reason Details
2 AIS VSWR
ERROR!
Pop-up message AIS antenna VSWR detection
(open circuit or short circuit)
Detect at each AIS
transmission. Either the
antenna is missing (open
circuit), or damaged
(short circuit). Can also
be due to corrosion of
wiring or connections.
Can continue operating,
however Tx and Rx will
be affected. Recommend
replacing antenna.
3 AIS CHANNEL
ERROR
AIS Icon flashes
ERR
AIS channel background noise
exceeds -77dbm
Detect every 4 seconds.
Usually because all AIS-CS
transmit slots are busy.
The system will transmit
when slots are available.
4 AIS FREQUENCY
ERROR
AIS Icon flashes
ERR
AIS channel frequency settings
invalid
Detect when channel
settings changes (by
Msg22 or DSC channel
management).
5 AIS PLL ERROR! Pop-up message AIS channel PLL UNLOCK or not
functioning
Detect at each AIS
transmission. Phase
Locked Loop abnormal.
Restart the system, if
error repeats then service
required.
Troubleshooting
System
Issue Reason Details
1
Unit won’t power
ON
Fuse blown in Blackbox
Check the blade fuse in the unit and ensure the
correct amperage (10A). Reset the circuit breaker
2 Incorrect fuse / breaker
size
Ensure correct fuse / breaker rating at fuse /
breaker panel
3 Damaged wiring Check wiring maybe damaged or corroded.
4 System cannot be turned
on from a Wireless
Handset
Power to the system can only be turned on from
a fixed handset. Short press power button on any
fixed handset
5 Repeated blown
fuse or circuit
breaker tripping
Wiring reverse polarity
Check wiring: POWER (+) should be connected to
Battery (+)
6
System shuts
down when
transmitting
Insufficient power
available at the Blackbox
power terminals / flat
battery
A built-in low voltage safety feature shuts the
system down when the supply voltage drops
below the value specified in the specifications.
Likely to happen when the VHF is transmitting at
HI (25W) power.
Check wiring is capable of supplying required
current
7
No sound from
Handset speaker
Volume is set too low
Check volume is not at minimum and adjust as
required
8 Handset speaker is
turned OFF
Turn handset speaker ON.
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VHF Radio Help and Troubleshooting Guide | RS100 / RS100-B / V100 / V100-B User Manual
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