Bard I42H1D, I36H1D, I60H1D, I48H1D, I30H1D Troubleshooting ECM 142R Outdoor FAN Motor

TROUBLESHOOTING ECM™ 142R OUTDOOR FAN MOTOR

! WARNING

EXPOSED MOVING PARTS.

DISCONNECT ALL ELECTRICAL

POWER BEFORE SERVICING.

FAILURE TO DO SO CAN RESULT

IN SEVERE INJURY OR AMPUTATION.

!	WARNING
HAZARD OF ELECTRICAL SHOCK.
ELECTRICAL SHOCK CAN RESULT
IN SERIOUS INJURY OR DEATH.		1
DISCONNECT THE REMOTE		-
		-755
ELECTRIC POWER SUPPLY OR
		7961
SUPPLIES BEFORE SERVICING.

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.

Do not operate motor without fan blade attached. Such operations will cause the motor to oscillate up and down.

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.

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.

Manual	2100-549G
Page	53 of 59