Goodman Mfg R-410A manual Chart Continued On Next Page, Servicing, Symptom, Fault Descriptions

28				Troubleshooting Chart for ECM Variable Speed Air Circulator Blower Motors
		Symptom		Fault Description(s)	Possible Causes	Corrective Action		Cautions and Notes
	- Motor rocks			- This is normal start-up for	----	----		----
		slightly
				variable speed motor.
		when starting.
					- Manual disconnect switch off or	- Check 230 Vac power at motor.
					door switch open.	- Check low voltage (24 Vac R to C) at motor.		- Turn power OFF prior to repair.
					- Blown fuse or circuit breaker.	- Check low voltage connections
								Wait 5 minutes after
				- No movement.	- 24 Vac wires miswired.	(G, Y, W, R, C) at motor.
								disconnecting power before
					- Unseated pins in wiring	- Check for unseated pins in connectors
								opening motor.
					harness connectors.	on motor harness.
	- Motor won't							- Handle electronic motor/control with care.
					- Bad motor/control module.	- Test with a temporary jumper between R - G.
		start.			- Moisture present in motor or control module.
					- Loose motor mount.	- Check for loose motor mount.		- Turn power OFF prior to repair.
				- Motor rocks,				Wait 5 minutes after
						- Make sure blower wheel is tight on shaft.
					- Blower wheel not tight on motor shaft.			disconnecting power before
				but won't start.		- Perform motor/control replacement check,
					- Bad motor/control module.			opening motor.
						ECM motors only.
								- Handle electronic motor/control with care.
	- Motor
		oscillates up &		- It is normal for motor to
		down while		oscillate with	----	----		----
		being tested		no load on shaft.
		off of blower.
					- Variation in 230 Vac to motor.	- Check line voltage for variation or "sag".
					- Unseated pins in wiring harness	- Check low voltage connections
				- Varies up and down	connectors.	(G, Y, W, R, C) at
					- Erratic CFM command from	motor, unseated pins in motor		- Turn power OFF prior to repair.
				or intermittent.
					"BK" terminal.	harness connectors.
	- Motor starts,
					- Improper thermostat connection or setting.	- Check-out system controls - Thermostat.
		but runs			- Moisture present in motor/control module.	- Perform Moisture Check.*
		erratically.
					- Incorrect or dirty filter(s).	- Does removing panel or filter
				- "Hunts" or "puffs" at		reduce "puffing"?
					- Incorrect supply or return ductwork.	- Check/replace filter.		- Turn power OFF prior to repair.
				high CFM (speed).
					- Incorrect blower speed setting.	- Check/correct duct restrictions.
						- Adjust to correct blower speed setting.
		*Moisture Check
		- Connectors are	oriented "down" (or as recommended by equipment manufacturer).			- Arrange harnesses with "drip loop" under motor.
		- Is condensate drain plugged?				- Check for low airflow (too much latent capacity).
		- Check for undercharged condition.				- Check and plug leaks in return ducts,	cabinet.

Note: You must use the correct replacement control/motor module since they are factory programmed for specific operating modes. Even though they look alike, different modules may have completely different functionality. The ECM variable speed motors are c

Important Note: Using the wrong motor/control module voids all product warranties and may produce unexpected results.

SERVICING

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