Bard W18AA-A Installation Instructions Manual

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Bard W18AA-A Installation Instructions Manual Manual pdf 22 page image

Manual 2100-640FPage 22 of 32TROUBLESHOOTING NIDECSELECTECH SERIES ECM MOTORSIf the Motor Is Running1. It is normal for the motor to rock back and forthon start up. Do not replace the motor if this is theonly problem identified.2. If the system is excessively noisy, does not appearto change speeds in response to a demand (Heat,Cool, Other) or is having symptoms during thecycle such as tripping limit or freezing coil, checkthe following:A. Wait for programmed delays to time out.B. Ensure that the motors control inputs arewired as shown in the factory-supplied wiringdiagram to ensure motor is getting propercontrol 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 coilas necessary.D. Check the external static pressure (total ofboth supply and return) to ensure it is withinthe range as listed on the unit serial plate. Ifhigher than allowed, additional duct work isneeded.E. If the motor does not shut off at the end of thecycle, wait for any programmed delays to timeout (no more than 90 seconds). Also makesure that there is no call for “Continuous Fan”on the “G” terminal.F. If the above diagnostics do not solve theproblem, confirm the voltage checks inthe next section below, then continue withthe “Model SelecTech CommunicationDiagnostics”.If the Motor Is Not Running1. Check for proper high voltage and ground at the(L/L1) (G) (N/L2) connections at the motor (seeFigure 10). Correct any voltage issues beforeproceeding to the next step. The SelecTech motoris voltage specific. Only the correct voltage shouldbe applied to the proper motor. Input voltagewithin plus or minus 10% of the nominal LinePower VAC is acceptable.SERVICEFIGURE 10Motor ConnectionsFIGURE 10↓ ↓NOTE: Bard Models PA13242; PA13302; PA13362-A, -B; PA13422-A, -B, -C; PA13482-A, -B, -C; PA13602-A, -B, -Ccontain the X13-Series Motors.TROUBLESHOOTING GE X13-SERIES ECM2.3™ MOTORSIf the Motor is Running1. 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 changespeeds in response to a demand (Heat, Cool, Other), or is havingsymptoms 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 factorysupplied wiring diagram to insure motor is getting propercontrol signals and sequencing.c. Remove the filter and check that all dampers, registers, andgrilles are open and free flowing. If removing the filterscorrects the problem, clean or replace with a less restrictivefilter. Also check and clean the blower wheel or coil asnecessary.d.Check the external static pressure (total of both supply andreturn) to insure that you are within the ranges as listed on theunit serial plate. If higher than allowed, additional duct workis needed.e. If the motor does not shut off at the end of the cycle, wait forany programmed delays to time out (no more than 90seconds). 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 thevoltage checks in the next section below, then continue withthe “Model X13 Communication Diagnostics”.If the Motor is Not Running1. Check for proper high voltage and ground at the (L/L1) (G) (N/L2) connections at the motor (see Figure 10). Correct any voltageissues before proceeding to the next step. The X13 Motor is voltagespecific. Only the correct voltage should be applied to the propermotor. Input voltage within plus or minus 10% of the nominal 230VAC 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 X13Communication Diagnostics”.L2 LINEPOWEREARTHGROUNDL1 LINEPOWERNOTE: MOTOR IS CONSTANTLYPOWERED BY LINE VOLTAGELINEPOWERLINEPOWERGROUND