21
Service and Maintenance
Description, Specifications, Installation, Operation, and Service Manual
Federal Signal
www.fedsig.com
Table 5 Troubleshooting
Trouble
Possible Cause
Remedy
Siren motor inoperative Motor Starter overload relay
tripped
Reset Relay
Open circuit between motor
starter and motor
Check wiring for continuity
Rotor Jammed
Check rotor for free rotation.
Remove material causing
jamming.
Siren motor defective
Check motor and repair or
replace if necessary.
Faulty overload heater(s)
Replace
Motor starter
inoperative
Faulty motor starter control
winding
Replace coil
Motor starter overload relay
tripped
Reset relay
Faulty overload heater(s)
Replace heater(s)
Open circuit between
disconnect switch and motor
Check wiring for continuity.
Repair or replace wire as
necessary.
Open circuit between control
equipment and motor
Check wiring for continuity.
Repair or replace wire as
necessary.
Faulty control device(s)
Repair or replace as
necessary
Model 2 Motor Brush Replacement
To replace the Model 2 motor brush:
1.
Loosen the clips that hold the siren housing to the mounting surface. Lift off the
housing.
2.
Remove the insulated cap from the Armature Brush Holder and slide out the worn
armature brush. Do not loosen or remove the brush holder.
3.
Install the replacement brush and replace the cap. Ensure that the brush is properly
seated before tightening the cap. Make sure that the cap seats properly. However, do
not tighten the cap excessively, or it may break.
Model 2 Armature and Field Replacement
To replace the armature:
1.
Turn off the power to the siren at the disconnect switch.
2.
Remove the siren housing from the mechanism.
3.
Disconnect the electrical power wiring from the siren motor.
4.
Remove the mechanism from the mounting surface. If desired, the legs can also be
removed from the mechanism.
