Amana ASH13018 Service Manual download pdf (Page 44)

SERVICING

- Connectors are oriented "down" (or as recommended by equipment manufacturer). - Arrange harnesses with "drip loop" under motor.

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Check

for

undercharged

condition

. -

Check

and

plug

leaks

return

ducts

cabinet

*Moisture Check

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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

CHART CONTINUED ON NEXT PAGE

Symptom Fault Description(s) Possible Causes Corrective Action Cautions and Notes

- Motor rocks

slightly

when starting.

- This is normal start-up for

variable speed motor.

---- ---- ----

- No movement.

- Manual disconnect switch off or

door switch open.

- Blown fuse or circuit breaker.

- 24 Vac wires miswired.

- Unseated pins in wiring

harness connectors.

- Bad motor/control module.

- Moisture present in motor or control module.

- Check 230 Vac power at motor.

- Check low voltage (24 Vac R to C) at motor.

- Check low voltage connections

(G, Y, W, R, C) at motor.

- Check for unseated pins in connectors

on motor harness.

- Test with a temporary jumper between R - G.

- Turn power OFF prior to repair.

Wait 5 minutes after

disconnecting power before

opening motor.

- Handle electronic motor/control with care.

- Motor rocks,

but won't start.

- Loose motor mount.

- Blower wheel not tight on motor shaft.

- Bad motor/control module.

- Check for loose motor mount.

- Make sure blower wheel is tight on shaft.

- Perform motor/control replacement check,

ECM motors only.

- Turn power OFF prior to repair.

Wait 5 minutes after

disconnecting power before

opening motor.

- Handle electronic motor/control with care.

- Motor

oscillates up &

down while

being tested

off of blower.

- It is normal for motor to

oscillate with

no load on shaft.

---- ---- ----

- Varies up and down

or intermittent.

- Variation in 230 Vac to motor.

- Unseated pins in wiring harness

connectors.

- Erratic CFM command from

"BK" terminal.

- Improper thermostat connection or setting.

- Moisture present in motor/control module.

- Check line voltage for variation or "sag".

- Check low voltage connections

(G, Y, W, R, C) at

motor, unseated pins in motor

harness connectors.

- Check-out system controls - Thermostat.

- Perform Moisture Check.*

- Turn power OFF prior to repair.

- "Hunts" or "puffs" at

high CFM (speed).

- Incorrect or dirty filter(s).

- Incorrect supply or return ductwork.

- Incorrect blower speed setting.

- Does removing panel or filter

reduce "puffing"?

- Check/replace filter.

- Check/correct duct restrictions.

- Adjust to correct blower speed setting.

- Turn power OFF prior to repair.

Troubleshooting Chart for ECM Variable Speed Air Circulator Blower Motors

- Motor won't

start.

- Motor starts,

but runs

erratically.

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Amana ASH13018 Service Manual Page 44

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