Galls Street Thunder ST280 Manuale di installazione e istruzioni per l'uso - Pagina 17
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(Service CONT'D)
Troubleshooting
This unit is designed to provide years of reliable service under even the worst
conditions. Many times there may appear to be a problem with the unit when the
true problem is in the speaker(s) or improper installation. The following chart shows
typical symptoms and possible causes.
Symptom
Possible Cause
No power
On/Off PA Vol. Not ON
Yellow wire is not powered
Connector loose
Siren 20A fuse blown
Loose connection at power
source
No siren tone -
High voltage protection
PA works
Low voltage protection
Microphone button stuck
Park Kill polarity option set wrong
No siren tone -
Park Kill activated
No sound
Bad speaker or speaker wiring
No PA
PA volume not set properly
Distorted siren
Speaker assembly loose
sound
Intermittent Aux. Input connection
Low or high vehicle voltage
Intermittent
High voltage protection
siren tone
Low voltage protection
Microphone button activation
Circuit breaker in supply
connection
Shorted speaker or speaker wire
Horn function
Manual/Horn rocker switch stuck
or
Aux. Input improperly connected
Manual or
Aux. Input Polarity Option set
Thunder stuck
wrong
on
No Radio
Unit not connected to radio
Radio volume too low
No or Low
Radio outputs not isolated and/or
Radio
polarity hooked up backwards
Wrong siren
Two-Tone option jumper installed
tone
Aux. Input set to wrong function
Thunder not
Thunder disabled
working
One light
Internal 20A fuse blown
output not
working
Check
Be sure the On/Off PA Vol. Knob is not in the OFF position
Is yellow wire connected to switched +12VDC?
Check connector
Is power hooked up backwards? Positive ground vehicle?
Is an external fuse or circuit breaker used?
Are the negative leads connected to a good ground?
The input voltage must be less than 16 volts.
The input must be greater than 10V with the siren turned on.
Does microphone button release properly?
Is the PK jumper option properly configured?
Does the siren work when Park Kill input is disconnected?
Check for a short.
Check the PA Vol. In ON and turned up
Check for an open.
Have you tried turning the PA volume control?
Is the speaker bell or tip loose?
Is the Aux. Input used and wired properly?
Input voltage must be between 10-16 volts while siren is on.
Is the vehicle voltage regulator working properly?
Is the connector tight on the back of the unit? Is there a
loose connection on a power lead? The input must be
greater than 10V with the siren turned on.
Is something lying on the microphone?
Is a circuit breaker used with at least a 50A rating?
Does the speaker have water damage, or is a wire
pinched?
Does the switch return fully when released?
Is the Aux. Input used and wired properly?
Is the AUX jumper option properly configured?
Is the radio connected properly to the unit?
Can you hear the radio in the vehicle?
Have you tried turning the Radio volume control?
Are the radio wires connected to the correct polarity from
the radio output?
Is the TT jumper option properly configured?
Is the AUX jumper option configured properly?
Is the TD jumper option configured properly?
Check the output fuses inside the unit.
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