Amana GSC13060 Service Manual download pdf (Page 29)

SERVICING

S-16C CHECKING ECM MOTOR WINDINGS

WARNING

HIGH VOLTAGE!

Disconnect ALL power before servicing or installing.

Multiple power sources may be present. Failure to do

so may cause property damage, personal injury

or death.

1. Disconnect the 5-pin and the 16-pin connectors from the

ECM power head.

2. Remove the 2 screws securing the ECM power head and

separate it from the motor.

3. Disconnect the 3-pin motor connector from the power

head and lay it aside.

4. Using an ohmmeter, check the motor windings for conti-

nuity to ground (pins to motor shell). If the ohmmeter

indicates continuity to ground, the motor is defective and

must be replaced.

5. Using an ohmmeter, check the windings for continuity

(pin to pin). If no continuity is indicated, the thermal limit

(over load) device may be open. Allow motor to cool and

retest.

16-pin

connector

5-pin

connector

3-pin motor

connector

S-16D ECM CFM ADJUSTMENTS

MBE MOTOR

This section references the operation characteristics of the

MBE model motor only. The ECM control board is factory set

with the dipswitch #4 in the “ON” position and all other

dipswitches are factory set in the “OFF” position. When MBE

is used with 2-stage cooling units, dipswitch #4 should be in

the "OFF" position.

For most applications, the settings are to be changed

according to the electric heat size and the outdoor unit

selection.

The MBE product uses a General Electric ECM

motor.

This motor provides many features not available on the

traditional PSC motor. These features include:

• Improved Efficiency

• Constant CFM

• Soft Start and Stop

• Improved Humidity Control

MOTOR SPEED ADJUSTMENT

Each ECM™ blower motor has been preprogrammed for

operation at 4 distinct airflow levels when operating in

Cooling/Heat Pump mode or Electric Heat mode. These 4

distinct levels may also be adjusted slightly lower or higher

if desired. The adjustment between levels and the trim

adjustments are made by changing the dipswitch(s) either to

an "OFF" or "ON" position.

DIPSWITCH FUNCTIONS

The MBE air handler motor has an electronic control that

contains an eight (8) position dip switch. The function of

these dipswitches are shown in Table 1.

Dipswitch Number Function

N/A

Indoor Thermostat

Cooling & Heat Pump CFM

CFM Trim Adjust

Electric Heat

Table 1

CFM DELIVERY

Tables 2 and 3 show the CFM output for dipswitch combi-

nations 1-2, and 5-6.

Model Switch 1 Switch 2 CFM

OFF

1,200

OFF

1,000

OFF

800

600

OFF

1,600

OFF

1,400

OFF

1,200

1,000

OFF

2,000

OFF

1,800

OFF

1,600

1,200

OFF

1,100

OFF

850

OFF

700

OFF

2,050

OFF

1,750

OFF

1,600

OFF

1,200

AEPT30

AEPT36/60

MBE1200

MBE1600

MBE2000

Electric Heat Operation

Table 2

1 ... 28 29 30 ... 52

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Amana GSC13060 Service Manual Page 29

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