Troubleshooting Guide (continued)

Motor

Problem

 

Probable Cause

Suggested Corrective Action

 

 

 

 

 

 

 

 

 

 

Brake does not stop

1.

Brushes not seated

1.

Inspect/clean/replace

blade within 6 sec-

 

or lightly sticking.

 

brushes. See “Maintenance”

onds.

 

 

 

section.

 

2.

Motor brake winding

2.

Use only recommended

 

 

overheated from

 

blades/accessories.

 

 

use of prohibited

 

Let motor cool down.

 

 

accessory or rapid

 

 

 

 

on/off cycling.

3.

Retighten

 

3.

Arbor screw loose.

 

4.

Get authorized service. See

 

4.

Other

 

 

“Troubleshooting of brake”

 

 

 

 

 

 

 

 

section.

 

 

 

 

 

Motor does not

1.

Fuse.

1.

Check fuse, or circuit breaker.

start.

2.

Brushes worn.

2.

See “Maintenance” section.

 

3.

Other.

3.

Get authorized service.

 

 

 

 

 

Brush sparking

1.

Normal automatic

1.

None

when switch

 

brake working prop-

 

 

released.

 

erly.

 

 

 

 

 

 

 

Wiring Diagram

 

 

White Field

 

Red Brush

 

 

Lead

 

Connector

 

Red

Lead

 

 

 

 

 

Brush

 

 

 

 

 

White

 

 

 

 

 

 

Armature

Cord w/Plug

 

Gray Brake

N.C.

 

 

 

Lead

 

Brush

 

 

 

 

 

 

Black

 

White Brush

 

 

 

N.O. Switch

Lead

 

 

 

 

Trouble Shooting of Brake by Qualified Service Person Only

1.Check commutation at no load. If there is a heavy sparking which follows the curvature of the commutator: replace the armature.

2.To continue trouble shooting, now unplug the power cord.

3.Install service brushes, especially if delayed come-in of brake has been noticed before failure.

4.Check brake circuit for continuity: remove brush caps and brushes. Use ohmmeter to check continuity from brass brush holder to brush holder. If open, locate exact place using ohmme- ter. As indicated by test, tighten con- nection or replace field assembly or replace switch.

5.After repair, check direction of blade rotation vs. guard arrow.

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RIDGID MS1290LZ manual Wiring Diagram, Motor, Trouble Shooting of Brake by Qualified Service Person Only