SERVICE
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), controlled devices, or improper installation. The following chart shows typical symptoms and possible causes.
A blown internal siren fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted this fuse will blow before the unit is damaged. Disconnect the SPKR leads and replace the fuse. If the unit itself emits a low level sound when in the Yelp position it is OK. Check the speaker(s) or leads for possible shorting.
PROBLEMS
Symptom | Possible Cause | Check |
|
No Power or siren output | Power switch not turned on | Does backlighting come on? |
|
| Bad Speaker | Do you hear a “pop” when turned on? |
|
| Connector or connections loose | With siren on, yelp selected, listen for tone in amplifier. | |
| Internal siren fuse blown | Is an external fuse or circuit breaker used? |
|
| Loose connection at power source | Are the power leads connected to a good buss? | |
No siren tone – | High Voltage Protection | The input voltage must be less than highest rating. | |
PA works | Mic button stuck | Does mic button release properly? |
|
| Cutout activated | Does siren work when Cutout input is disconnected? | |
| Cutout Polarity Option set wrong | Is the CUT P option properly configured? |
|
No PA | PA volume not set properly | Try turning the PA volume control. |
|
| Selector in Radio position | PA is not available in the Radio position. |
|
Distorted siren sound | Speaker assembly loose | Is the speaker bell or tip loose? |
|
| Intermittent Aux Input connection | Is the Aux Input used and wired properly? |
|
| Low vehicle voltage | The input voltage must be greater than lowest rating. | |
Intermittent siren tone | High Voltage Protection | Is the vehicle voltage regulator working properly? | |
| Connector or connections loose | Is the connector tight on the back of the unit? | |
| Loose connection at power source | Check for loose leads back to power source. | |
| Mic button activation | Is something lying on the microphone? |
|
| Circuit breaker in supply | Is a circuit breaker used with at least 50A rating? | |
| connection |
|
|
Horn or Manual or | Horn switch stuck | Does the Horn switch return fully when released? | |
Phaser stuck on | Man/Phsr switch stuck | Does the Man/Phsr switch return fully when released? | |
| Aux Input improperly connected | Is the Aux Input used and wired properly? |
|
| Aux Input Polarity Option set | Is the AUX P option properly configured? |
|
| wrong |
|
|
No Radio | Unit not connected to a radio | Is the radio connected properly to the unit? |
|
| Radio volume too low | Can you hear the radio in the vehicle? |
|
|
| Try turning the RAD volume control. |
|
Wrong siren tone | Is the |
| |
| Aux Input set to wrong function | Is the AUX I option jumper configured properly? | |
Phaser not working | Phaser disabled | Is the PHSR option jumper cut? |
|
Horn not working | Horn disabled | Is the trace cut that disables the Horn switch? | |
Automatic Siren not | Selector in Radio position | Siren tone is not available in Radio position. | |
working | Automatic Siren disabled | Is the internal red lead cut from lever switch board? | |
Automatic Siren in all | No power to red lever switch lead | Do the lever switch relays turn on devices? |
|
lever switch positions |
| Check for power at red lever switch lead. |
|
|
|
|
|
Lever switch not working | No power to red lever switch lead | Do the lever switch indicators light? |
|
in all positions | No ground at siren connector | Check for power at red lever switch lead. |
|
Lever switch not working | Loose lever switch output | Does the lever switch indicator light? |
|
in some positions | connection on lead |
|
|
Lever switch not working | Loose lever switch output | Does the lever switch indicator light? |
|
in some positions | connection on lead |
|
|
Lever switch output | Internal relay contacts fused from | Is the output current exceeding 20AMPS? |
|
stays on | overheating |
|
|
Rocker switch outputs | No power to rocker switch | Is the corresponding fuse blown? |
|
not working | Loose rocker switch output | Does the rocker switch indicator light turn on? | |
| connection on lead |
|
|
TB0346A | Page 11 of 12 | 05/07/05 | |
