Manual 2100-790
Page
34 of 49
Troubleshooting Nidec SelecTech
Series ECM Motors
If the Motor Is Running
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
to change speeds in response to a demand (Heat,
Cool, Other) or is having symptoms during the
cycle such as tripping limit or freezing coil, check
the following:
A. Wait for programmed delays to time out.
B. Ensure that the motors control inputs are
wired as shown in the factory-supplied wiring
diagram to ensure motor is getting proper
control signals and sequencing.
C. Remove the filter and check that all dampers,
registers and grilles are open and free flowing.
If removing the filters corrects the problem,
clean or replace with a less restrictive filter.
Also check and clean the blower wheel or coil
as necessary.
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 any programmed delays to time
out (no more than 90 seconds). Also make
sure that there is no call for “Continuous Fan”
on the “G” terminal.
F. If the above diagnostics do not solve the
problem, confirm the voltage checks in
the next section below, then continue with
the “Model SelecTech Communication
Diagnostics”.
If the Motor Is Not Running
1. Check for proper high voltage and ground at the
(L/L1) (G) (N/L2) connections at the motor (see
Figure 11). Correct any voltage issues before
proceeding to the next step. The SelecTech motor
is voltage 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.
2. If the motor has proper high voltage and ground at
the (L/L1) (G) (N/L2) connections, then continue
to “Model SelecTech Communication Diagnostics”.
FIGURE 11
Motor Connections
Manual
2100-467H
Page
22 of 23
FIGURE 10
↓
↓
NOTE: Bard Models PA13242; PA13302; PA13362-A, -B; PA13422-A, -B, -C; PA13482-A, -B, -C; PA13602-A, -B, -C
contain the X13-Series Motors.
TROUBLESHOOTING GE X13-SERIES ECM2.3
™
MOTORS
If the Motor is Running
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 to change
speeds in response to a demand (Heat, Cool, Other), or is having
symptoms during the cycle such as tripping limit or freezing coil,
check the following:
a. Wait for programmed delays to time out.
b. Ensure that the motors control inputs are wired to the factory
supplied wiring diagram to insure motor is getting proper
control signals and sequencing.
c. Remove the filter and check that all dampers, registers, and
grilles are open and free flowing. If removing the filters
corrects the problem, clean or replace with a less restrictive
filter. Also check and clean the blower wheel or coil as
necessary.
d. Check the external static pressure (total of both supply and
return) to insure that you are within the ranges 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
any programmed delays to time out (no more than 90
seconds). Also make sure that there is no call for
“Continuous Fan” on the "G" terminal.
f. If the above diagnostics do not solve the problem, confirm the
voltage checks in the next section below, then continue with
the “Model X13 Communication Diagnostics”.
If the Motor is Not Running
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
issues before proceeding to the next step. The X13 Motor is voltage
specific. Only the correct voltage should be applied to the proper
motor. Input voltage within plus or minus 10% of the nominal 230
VAC is acceptable.
2. If the motor has proper high voltage and ground at the (L/L1)
(G) (N/L2) connections, then continue with the “Model X13
Communication Diagnostics”.
L2 LINE
POWER
EARTH
GROUND
L1 LINE
POWER
NOTE: MOTOR IS CONSTANTLY
POWERED BY LINE VOLTAGE
LINE
POWER
LINE
POWER
GROUND
