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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 siren fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted the 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.
25A Fuses are required for each light control output. Adequate fuse rating is required to prevent overheating of the output connection block.
PROBLEMS
Symptom | Possible Cause | Check |
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No power or siren | Power switch not turned on | Does backlighting come on? |
output | Bad Speaker | Do you hear a "pop" when turned on? |
| Connector or connections loose | With siren on, yelp selected, listen for tone in amplifier. |
| 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 | PA PTT button stuck | Does PTT button release properly? |
| Cutout activated | Does the siren work when Cutout input is disconnected? |
| Cutout Polarity Option set wrong | Is the Cutout Input Polarity option properly configured? |
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No PA | PA volume not set properly | Have you tried turning the PA volume control? |
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Distorted siren | Speaker assembly loose | Is the speaker bell or tip loose? |
sound | Intermittent Aux Input connection | Is the Aux Siren Input used and wired properly? |
| Low vehicle voltage | The input voltage must be greater than lowest rating. |
Intermittent siren | High Voltage Protection | Is the vehicle voltage regulator working properly? |
tone | 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. |
| PA PTT button activation | Is something lying on the PTT button? |
| Circuit breaker in supply connection | Is a circuit breaker used with at least a 50A rating? |
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Horn function | Siren button switch stuck | Does the Siren button switch return fully when released? |
stuck on or | Aux Siren switch stuck | Does the Aux Siren switch return fully when released? |
Manual or Phaser | Aux Input improperly connected | Is the Aux Siren Input used and wired properly? |
stuck on | Aux Input Polarity Option set wrong | Is the AUX Siren Polarity option properly configured? |
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No Radio | Unit not connected to radio | Is the radio connected properly to the unit? |
| Radio volume too low | Can you here the radio in the vehicle? |
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| Have you tried setting the Radio Volume Adjust? |
Wrong siren tone | Is the | |
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Phaser not work- | Phaser disabled | Is the Phaser Disable option set? |
ing |
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Horn not working | Horn disabled | Is the Horn Disable option set? |
Manual stops | Short Manual enabled | Is the Short Manual option set? |
immediately |
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Automatic Siren | Automatic Siren disabled | Is the Automatic Siren Disable option set? |
not working |
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Light Output not | Light Control Output fuse blown | Is the light or device shorting? |
working | Internal relay contacts bad | Is the output current limited to 20A? |
Light Output stays | Internal relay contacts fused from | Is the output current limited to 20A? |
on | overheating |
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Internal switching transistor bad | Is the external relay coil shorting? | |
output not work- |
| Is the output current limited to 500mA? |
ing |
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Slide switch | Slide Switch is reversed | Is the Slide Switch Reverse option set? |
outputs turn on in |
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wrong order |
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05/07/05 | CP4818B |