Washer Blower Troubleshooting

Common Problems

Last Updated: Friday, October 7, 2022

CAUTION: DISABLE ALL MACHINE POWER AND OBSERVE LOCKOUT PROCEDURES PRIOR TO MAKING ANY ADJUSTMENTS TO THE MACHINE. FAILURE TO DO SO COULD RESULT IN SEVERE EMBARRASSMENT, INJURY OR DEATH.

Motor Nameplate used for this document

If the motor will not run, first check the fuses.

To change motor rotation direction, swap two of wires coming out of the contactor before the soft start. This is much easier than changing the U1,V1,W1,U2,V2,W2 going to the motor leads.

Check the wiring vs the diagram in the Erdman schematics.

If the fuses are good, check the RUN/FAULT LED on the soft start
	blinks
overload	1
temperature	2
phase reversal	3
phase loss / open load	4
phase imbalance	5
shorted scr	6
test	7

To check the impedance of the motor windings,these are expected values.
V1/2 (T2)	W1/3 (T3)	U2/4 (T5)	V2/5 (T4)	W2/6 (T6)
open circuit	open circuit	0.8Ω	open circuit	open circuit	U1/1 (T1)
	open circuit	open circuit	@0.8Ω	open circuit	U1/1 (T1)
		open circuit	open circuit	@0.8Ω	U1/1 (T1)
			open circuit	open circuit	U2/4 (T5)
				open circuit	V2/5 (T4)

Note that the 1,2,3,4,5,6 on the motor leads inside the motor box should NOT match the T1,T2,T3,T4,T5,T6 in the Erdman schematics.