S-15B Capacitance Check; Checking Motors; S-16A Checking Fan And Blower Motor Windings (Psc Motors); S-16D Checking Eem Motors - Goodman *PH 16 Service Instructions Manual

SERVICING

S-15B CAPACITANCE CHECK

WARNING
DISCHARGE CAPACITOR THROUGH A 20 TO 30 OHM
RESISTOR BEFORE HANDLING.
Using a hookup as shown below, take the amperage and volt-
age readings and use them in the formula:
Capacitance (MFD) = 2650 X Amperage
VOLTMETER
AMMETER
TESTING CAPACITANCE
S-16 CHECKING MOTORS
S-16A CHECKING FAN AND BLOWER MOTOR
WINDINGS (PSC MOTORS)
Applies only to units with PSC Motors
The auto reset fan motor overload is designed to protect the
motor against high temperature and high amperage conditions
by breaking the common circuit within the motor, similar to the
compressor internal overload. However, heat generated within
the motor is faster to dissipate than the compressor, allow at
least 45 minutes for the overload to reset, then retest.
28
Voltage
15 AMP
FUSE
CAPACITOR
WARNING
1. Remove the motor leads from its respective connection
points and capacitor (if applicable).
2. Check the continuity between each of the motor leads.
3. Touch one probe of the ohmmeter to an unpainted end of
the motor frame (ground) and the other probe in turn to
each lead.
If the windings do not test continuous or a reading is obtained
from any lead to ground, replace the motor.
S-16D CHECKING EEM (ENERGY EFFICIENT
MOTOR) MOTORS
Applies only to units with EEM Motors
The EEM Motor is a one piece, fully encapsulated, 3 phase
brushless DC (single phase AC input) motor with ball bearing
construction. Unlike the ECM 2.3/2.5 motors, the EEM fea-
tures an integral control module.
Note: The GE TECMate will not currently operate the EEM
motor.
1. Using a voltmeter, check for 230 volts to the motor connec-
tions L and N. If 230 volts is present, proceed to step 2. If
230 volts is not present, check the line voltage circuit to
the motor.
2. Using a voltmeter, check for 24 volts from terminal C to
either terminal 1, 2, 3, 4 or 5, depending on which tap is
being used, at the motor. If voltage present, proceed to
step 3. If no voltage, check 24 volt circuit to motor.
3. If voltage was present in steps 1 and 2, the motor has failed
and will need to be replaced.
Note: When replacing motor, ensure the belly band is between
the vents on the motor and the wiring has the proper drip loop
to prevent condensate from entering the motor.