Service; Troubleshooting Nidec Selectech Series Ecm Motors; If The Motor Is Running; If The Motor Is Not Running - Bard 11EER WA W18AB-A User's Application Manual

Troubleshooting NIDEC SELECTECH
TROUBLESHOOTING GE X13-SERIES ECM2.3
Series ECM Motors

If the Motor Is Running

NOTE: Bard Models PA13242; PA13302; PA13362-A, -B; PA13422-A, -B, -C; PA13482-A, -B, -C; PA13602-A, -B, -C
1. It is normal for the motor to rock back and forth
contain the X13-Series Motors.
on start up. Do not replace the motor if this is the
If the Motor is Running
only problem identified.
1. It is normal for the motor to rock back and forth on start up.
Do not replace the motor if this is the only problem identified.
2. If the system is excessively noisy, does not appear
2. If the system is excessively noisy, does not appear to change
to change speeds in response to a demand (Heat,
speeds in response to a demand (Heat, Cool, Other), or is having
Cool, Other) or is having symptoms during the
symptoms during the cycle such as tripping limit or freezing coil,
cycle such as tripping limit or freezing coil, check
check the following:
the following:
a. Wait for programmed delays to time out.
b.Ensure that the motors control inputs are wired to the factory
A. Wait for programmed delays to time out.
supplied wiring diagram to insure motor is getting proper
control signals and sequencing.
B. Ensure that the motors control inputs are
c. Remove the filter and check that all dampers, registers, and
wired as shown in the factory-supplied wiring
grilles are open and free flowing. If removing the filters
diagram to ensure motor is getting proper
corrects the problem, clean or replace with a less restrictive
control signals and sequencing.
filter. Also check and clean the blower wheel or coil as
necessary.
C. Remove the filter and check that all dampers,
d.Check the external static pressure (total of both supply and
registers and grilles are open and free flowing.
return) to insure that you are within the ranges as listed on the
If removing the filters corrects the problem,
unit serial plate. If higher than allowed, additional duct work
is needed.
clean or replace with a less restrictive filter.
Also check and clean the blower wheel or coil
as necessary.
↓
L2 LINE EARTH
POWER GROUND
NOTE: MOTOR IS CONSTANTLY
POWERED BY LINE VOLTAGE
Manual 2100-467H
FIGURE 11
Motor Connections
FIGURE 10
↓
L1 LINE
POWER
D. Check the external static pressure (total of
both supply and return) to ensure it is within
the range as listed on the unit serial plate. If
higher than allowed, additional duct work is
needed.
e. If the motor does not shut off at the end of the cycle, wait for
E. If the motor does not shut off at the end of the
any programmed delays to time out (no more than 90
cycle, wait for any programmed delays to time
seconds). Also make sure that there is no call for
out (no more than 90 seconds). Also make
"Continuous Fan" on the "G" terminal.
sure that there is no call for "Continuous Fan"
f. If the above diagnostics do not solve the problem, confirm the
voltage checks in the next section below, then continue with
on the G terminal.
the "Model X13 Communication Diagnostics".
F. If the above diagnostics do not solve the

If the Motor is Not Running

problem, confirm the voltage checks in the
next section below, then continue with the
1. Check for proper high voltage and ground at the (L/L1) (G) (N/
L2) connections at the motor (see Figure 10). Correct any voltage

Model SelecTech Communication Diagnostics.

issues before proceeding to the next step. The X13 Motor is voltage
If the Motor Is Not Running
specific. Only the correct voltage should be applied to the proper
motor. Input voltage within plus or minus 10% of the nominal 230
1. Check for proper high voltage and ground at the L/
VAC is acceptable.
L1, G, N/L2 connections at the motor (see Figure
2. If the motor has proper high voltage and ground at the (L/L1)
11). Correct any voltage issues before proceeding
(G) (N/L2) connections, then continue with the "Model X13
to the next step. The SelecTech motor is voltage
Communication Diagnostics".
specific. Only the correct voltage should be applied
to the proper motor. Input voltage within plus
or minus 10% of the nominal line power VAC is
acceptable.
LINE
POWER
GROUND
LINE
POWER

SERVICE

™ MOTORS
Manual 2100-689H
Page 25 of 42