GPH16M Service Manual

SERVICING
29
C
LGN
123
4
5
High Voltage
Connections
3/16"
Low Voltage Connections
1/4”
EEM MOTOR CONNECTIONS
WARNING
Discharge capacitor through a 20 to 30 OHM
resistor before handling.
Capacitance (MFD) = 2650 X Amperage
Voltage
S-16A CHECKING FAN AND BLOWER MOTOR
WINDINGS (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.
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-16C CHECKING ECM MOTOR WINDINGS
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. 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 continu-
ity to ground (pins to motor shell). If the ohmmeter indi-
cates 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.
Motor
Connector
(3-pin)
Motor OK when
R > 100k ohm
(3-pin)
WINDING TEST
S-16D CHECKING EEM MOTORS
Applies to A/GPG15*****41A*
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.