Answer Posted / tj

Following is the check seq. :

1 Check for correct DOR/Phase Seq, ensure termination is
correct n tight.
2 Check the relay for malfunction & its type if it is
thermal then increase setting a bit more than ratd amps &
chk, n if its micro proc based then adjust the setting
acording to motor starting curve.
3 Ensure that suction damper is at min. before starting.
4 Ensure the motor is correct according to fan torque.
5 Check for any abnormal sound or play from fan side.
6 Also check the cable, it should not be underrated, causing
higher potential drop at startup.

Hope the above helps you........

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