Figure 10 Motor Connections; Service; Troubleshooting Nidec Selectech Series Ecm Motors - Bard W18AA-A Installation Instructions Manual

SERVICE

TROUBLESHOOTING NIDEC
SELECTECH SERIES ECM MOTORS
TROUBLESHOOTING GE X13-SERIES ECM2.3
If the Motor Is Running
1. It is normal for the motor to rock back and forth
NOTE: Bard Models PA13242; PA13302; PA13362-A, -B; PA13422-A, -B, -C; PA13482-A, -B, -C; PA13602-A, -B, -C
on start up. Do not replace the motor if this is the
contain the X13-Series Motors.
only problem identified.
If the Motor is Running
1. It is normal for the motor to rock back and forth on start up.
2. If the system is excessively noisy, does not appear
Do not replace the motor if this is the only problem identified.
to change speeds in response to a demand (Heat,
2. If the system is excessively noisy, does not appear to change
Cool, Other) or is having symptoms during the
speeds in response to a demand (Heat, Cool, Other), or is having
cycle such as tripping limit or freezing coil, check
symptoms during the cycle such as tripping limit or freezing coil,
check the following:
the following:
a. Wait for programmed delays to time out.
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
B. Ensure that the motors control inputs are
control signals and sequencing.
wired as shown in the factory-supplied wiring
c. Remove the filter and check that all dampers, registers, and
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
C. Remove the filter and check that all dampers, necessary.
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
clean or replace with a less restrictive filter.
is needed.
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 2100-640F
Page 22 of 32
FIGURE 10
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 any programmed delays to time
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
out (no more than 90 seconds). Also make
seconds). Also make sure that there is no call for
sure that there is no call for "Continuous Fan"
"Continuous Fan" on the "G" terminal.
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
F. If the above diagnostics do not solve the
the "Model X13 Communication Diagnostics".
problem, confirm the voltage checks in
the next section below, then continue with
If the Motor is Not Running
the "Model SelecTech Communication
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 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
VAC is acceptable.
(L/L1) (G) (N/L2) connections at the motor (see
2. If the motor has proper high voltage and ground at the (L/L1)
Figure 10). Correct any voltage issues before
(G) (N/L2) connections, then continue with the "Model X13
proceeding to the next step. The SelecTech motor
Communication Diagnostics".
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.
LINE
POWER
GROUND
LINE
POWER
™ MOTORS