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Manual 2100-549G
Page 53 of 59
TROUBLESHOOTING ECM
™
142R OUTDOOR FAN MOTOR
You must obtain the correct replacement
motor from the manufacturer that is a direct
replacement for the failed motor.
USING THE WRONG MOTOR VOIDS ALL
WARRANTIES AND MAY PRODUCE
UNEXPECTED RESULTS.
Do not operate motor without fan blade
attached. Such operations will cause the
motor to oscillate up and down.
1. In normal operation, this motor may rock back and
forth on start up. Do not replace if this is the only
symptom identified.
2. If the system is operating properly, but the motor
appears to run slower than it should, the motor is
good. High efficiency systems with optimized fan
blades are engineered to run slow to decrease noise.
The Bard I-TEC Series models also adjust fan speed
based upon varied outdoor ambient conditions to
optimize sound and unit efficiency.
3. If the system is noisy, freezing up, running a high
head pressure, tripping the high pressure switch or
compressor overload, check the following:
a. Ensure cleanliness of condenser coil(s) and fan
blade/shroud.
b. Confirm the fan blade is not bent or deformed,
isn't rubbing on the shroud, and that it is tight
on the motor shaft. Also ensure the motor is
secure in its mounting system, and the
mounting system is secure to the unit.
c. The Bard I-TEC is equipped with a low
ambient control pressure switch. This pressure
switch completes the 24VAC Common feed to
the outdoor fan motor control in cooling mode.
If this switch is defective, or if the outdoor air
temperature is too cold to raise the head
pressure to the 325# switch closing set-point,
or the system charge is too low, this could be
the cause of the issue. (In heat pump
{heating} mode, the low ambient fan cycling
control is bypassed.)
d. If motor is not running, go to next section.
4. If the motor does not appear to be running at the
proper speed or does not shut off, refer to the next
section for voltage checks to determine if the motor
is getting the proper input signals.
If the motor IS NOT receiving any communication,
troubleshoot the communication issue using the
diagnostic table for the Fan Logic Control.
a. This motor uses a 7 wire harness to control the
motor.
DISCONNECT ALL ELECTRICAL
IN SEVERE INJURY OR AMPUTATION.
EXPOSED MOVING PARTS.
WARNING
POWER BEFORE SERVICING.
!
SUPPLIES BEFORE SERVICING.
!
WARNING
7961-755-1
FAILURE TO DO SO CAN RESULT
IN SERIOUS INJURY OR DEATH.
DISCONNECT THE REMOTE
ELECTRIC POWER SUPPLY OR
HAZARD OF ELECTRICAL SHOCK.
ELECTRICAL SHOCK CAN RESULT