GSX14 Service Manual

SERVICING
77
Condenser fan control for the ASXC/ASZC and DSXC/DSZC
models is fully integrated into the UC control. The control
supports one- or two-speed PSC condenser fan motors and
one- or two-speed ECM condenser fan motors.
The fan motor is controlled by two on-board relays. Connec-
tion to the fan motor is via a 6-circuit plug connector. Wiring
to the connector is dependant upon the type of condenser fan
motor used. See unit wiring diagram for details.
CHECKING RELAY CONTACTS - PSC FAN MOTOR
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 motor leads from 6-circuit fan motor wire
harness.
2. Connect a voltmeter between circuit 3 and circuits 2 (low
speed) or 1 (high speed).
NOTE: Circuit 3 is connected directly to L2.
3. Energize the system at low or high stage.
WARNING
Line Voltage now present.
4. The measured voltage between circuit 3 and circuits 2 or
1 should be approximately 0VAC, which indicates the
relay contacts are closed. A voltage measurement of
approximately 115VAC indicates the relay is open.
Replace the control if the relay checks open when it
should be closed. See notes and cautions below.
NOTE: Ensure any ON delays have expired before making
voltage measurements
CAUTION: Prolonged operation with the condenser fan
motor disconnected will cause the high pressure switch to
trip.
CHECKING RELAY CONTACTS - ECM FAN MOTOR
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 motor leads from 6-circuit fan motor wire
harness.
2. Connect a voltmeter between circuit 6 and circuits 3 (low
speed) or 1 (high speed).
NOTE: Circuit 6 is connected directly to 24VAC.
3. Energize the system at low or high stage.
WARNING
Line Voltage now present.
4. The measured voltage between circuit 6 and circuits 3 or
1 should be approximately 0VAC, which indicates the
relay contacts are closed. A voltage measurement of
approximately 24VAC indicates the relay is open. Re-
place the control if the relay checks open when it should
be closed. See notes and cautions below.
5. Circuit 5 is connected to 24VAC common. The measured
voltage between circuits 6 and 5 should be 24VAC.
NOTE: Ensure any ON delays have expired before making
voltage measurements
CAUTION: Prolonged operation with the condenser fan
motor disconnected will cause the high pressure switch to
trip.
S-10 COPELAND COMFORT ALERT™
DIAGNOSTICS - 3-WIRE MODULE
Applies to ASX /ASZ and DSX/DSZ units
Comfort Alert™ is self-contained with no required external
sensors and is designed to install directly into the electrical
box of any residential condensing unit that has a Copeland
Scroll™ compressor inside.
Once attached, Comfort Alert provides around-the-clock
monitoring for common electrical problems, compressor
defects and broad system faults. If a glitch is detected, an
LED indicator flashes the proper alert codes to help you
quickly pinpoint the problem. See Diagnostic Table: 3-Wire
Comfort Alert Module on previous page.)