ELECTRICAL INSTALLATION, WIRING AND TROUBLESHOOTING
Nederman Customer Service & Technical Support [email protected]
+1 (336) 821-0800
8
Section 4.0 – Troubleshooting
Please follow these steps to verify motor condition. If it is a brand new motor, please contact Nederman.
1)
Separate the individual motor leads and check the resistance if each winding with an ohmmeter. A standard
multi
‐
meter is limited in checking issues with motors, but can still provide some valuable information.
2)
For the 9
‐
wire motors, note the resistance values below:
a.
T1 to T4 =
b.
T2 to T5 =
c.
T3 to T6 =
d.
T7 to T8 =
e.
T8 to T9 =
f.
T7 to T9 =
3)
Next, check each value to ground, or the chassis.
a.
T1 to GND =
b.
T2 to GND =
c.
T3 to GND =
d.
T4 to GND =
e.
T5 to GND =
f.
T6 to GND =
g.
T7 to GND =
h.
T8 to GND =
i.
T9 to GND =
4)
While the motor is disconnected and the circuit breaker turned off, measure the resistance of the
supply leads to ground to ensure there is not a direct short from one of the supply leads.
a.
L1 to GND =
b.
L2 to GND =
c.
L3 to GND =
5)
If you have access to a MEGGER, perform an Insulation test from each lead to ground (motor frame):
a.
T1 to GND =
b.
T2 to GND =
c.
T3 to GND =
d.
T4 to GND =
e.
T5 to GND =
f.
T6 to GND =
g.
T7 to GND =
h.
T8 to GND =
i.
T9 to GND =
6)
Reconnect leads, following the proper wiring pattern shown on the motor wiring label. Before proceeding,
remove any wire
‐
nuts from the motor. Wire nuts & soldered connections are prohibited for motor
connections per NFPA 79, 13.5.9.2. Use crimp connections, lugs & split
‐
bolts, Polaris connectors, or some
other acceptable connection method
7)
Start the dust collector and measure the running current after the motor reaches full
‐
speed.
a.
L1 Amps =
b.
L2 Amps =
c.
L3 Amps =