SERVICING
26
S-15B CAPACITANCE CHECK
Using a hookup as shown below, take the amperage and
voltage readings and use them in the formula:
VOLTMETER
CAPACITOR
AMMETER
15 AMP
FUSE
TESTING CAPACITANCE
WARNING
Discharge capacitor through a 20 to 30 OHM
resistor before handling.
Capacitance (MFD) = 2650 X Amperage
Voltage
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 condi-
tions by breaking the common circuit within the motor, similar
to the compressor internal overload. However, heat gener-
ated within the motor is faster to dissipate than the compres-
sor, allow at least 45 minutes for the overload to reset, then
retest.
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do so
may cause property damage, personal injury
or death.
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 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 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
features an integral control module.
Note: The GE TECMate will not currently operate the GE EEM
motor.
1. Using a voltmeter, check for 230 volts to the motor
connections 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.
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