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TROUBLE-SHOOTING CHECK LIST
SYMPTOMS
A - Siren motor does not start and siren does not rotate.
POSSIBLE CAUSE
CORRECTIVE PROCEDURE
1.No power to motor controls
1.Check fuses and power supply
2.Defective magnetic starter relay
2. Replace relay
3.Burned or pitted magnetic starter relay
3. Replace relay
contacts
4.Loose connections in control panel
4.Check and repair
5.Overload is kicked out on starter relay
5.Trace overload and correct the cause
6.Electric motor windings either open or
6.Test motor and replace
shorted
7.Remote actuating system defective
7.Trouble-shoot and correct
8.Worn collector rings or brushes
8.Replace
9.Dirty or corroded collector rings
9.Clean and polish
10.Loose connection on collector ring assembly
10.Trace and repair
11.Ice in siren rotor-stator
11.De-ice with hot antifreeze or hot air blower.
Do not use flame near fiberglass
B - Siren operates with difficulty or erratically.
POSSIBLE CAUSE
CORRECTIVE PROCEDURE
1.Siren air intake clogged
1. Clear obstruction
2.Build-up of foreign material between siren
2. Disassemble housing and clean. Air gap
rotor and stator
should be .025 inch or more.
3.Rotation mechanism binding
3. Inspect to determine cause and free-up or
replace defective parts
C - Siren sounds but does not rotate.
POSSIBLE CAUSE
CORRECTIVE PROCEDURE
1.Foreign material jamming rotating
1.Clear obstructions
mechanism
2.Defective gear reducer
2.Replace
3.Broken jaw coupling
3.Replace
4.Loose setscrew on jaw coupling
4.Retighten
5.Improper torque adjustment on drive chain
5.Adjust torque spring to correct slippage
assembly
6.Chain slipping or off track
6.Adjust torque spring or replace chain
7.Broken drive chain
7.Repair broken links
8.Upper or lower bearing seized
8.Free-up and lubricate or replace
