Goodman Mfg RT6100004R13 - Manual (Page 38)

SERVICING
38
1
2
3
4
5
Lines 1 and 2 will be connected
for 12OVAC Power Connector
applications only
Gnd
AC Line Connection
AC Line Connection
}
11
1 9
2
3
4
5
6
7
8 16
15
14
13
12
10
OUT - OUT +
ADJUST +/- G (FAN)
Y1 Y/Y2
COOL EM Ht/W2
DELAY 24 Vac (R)
COMMON2 HEAT
W/W1 BK/PWM (SPEED)
COMMON1 O (REV VALVE)
16-PIN ECM HARNESS CONNECTOR
If you do not read voltage and continuity as described, the
problem is in the control or interface board, but not the motor.
If you register voltage as described , the ECM power head is
defective and must be replaced.
S-16C CHECKING ECM MOTOR WINDINGS
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
continuity to ground (pins to motor shell). If the ohmme-
ter 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 TM 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.