| A1: Check input power to starter. Is there
power on all lines? (Three-phase motors won't start on
one-phase.) |
 |
Restore power
on all lines |
 |
|
|
| A2: Check starter. Is overload protection
device opened? |
 |
Replace or reset
device. Does it open again when starting? |
 |
| A3: Is there power on all lines to motor? |
|
Repair starter |
|
|
|
| A4: Is voltage to motor more than 10% below
nameplate voltage? |
|
Restore proper
voltage. |
 |
|
|
| A5: Check motor terminal connections. Are
any loose or broken? |
|
Repair connections. |
|
|
|
| A6: May be wrong motor for application. Is
starting load too high? |
|
Install Design
C or Design D motor. Install larger
motor. |
|
|
|
| A7: Is driven machine jammed or overloaded? |
|
Remove jam or
overload. |
|
|
|
| A8: Are misalignments, bad bearings or damaged
components causing excessive friction in driven machine
or power transmission system? |
|
Repair or replace
component. |
|
|
|
| A9: Are bad bearings, bent shaft, damaged
end bells, rubbing fan or rotor or other problem causing
excessive friction in the motor? |
|
Repair or replace
motor. |
|
|
|
| A10: Check stator. Are any coils open, shored
or grounded? |
|
Repair coil or
replace motor. |
|
|
|
| A11: Check commutator. Are any bars or rings
broken? |
|
Replace rotor. |
