Emerson 2330MKII manual Troubleshooting, Indication Possible Cause Corrective Action

Page 35

 

 

BOOK 0958-B

 

TABLE 6. TROUBLESHOOTING

 

 

 

INDICATION

POSSIBLE CAUSE

CORRECTIVE ACTION

 

 

 

 

Low line voltage

Check for rated line voltage, ±10%, on the

 

controller line terminals.

 

 

 

 

 

 

 

Check shunt field current.a Low shunt field

 

 

current causes excessive armature current. If

 

 

field current is adequate, check for a mechani

 

Motor overloaded

cal overload. If the unloaded motor shaft does

 

not rotate freely, check motor bearings. Also

 

 

check for a shorted motor armature. Motor

7. Motor won’t reach top

 

overload can also be caused by incorrect gear

 

ratio. Correct accordingly.

speed

 

 

 

 

 

 

 

Maximum speed set too low

Turn the MAX SPD potentiometer clockwise.

 

 

 

 

Current limit set too low

Turn the CUR LMT potentiometer clockwise.

 

 

 

 

Current scaling jumper J4 in wrong

See Step 4 and Table 2 on page 5.

 

position

 

 

 

 

 

 

Motor field demagnetizedb

Replace the motor.

 

Control board failure

Replace the control board.

 

 

 

 

 

Observe line voltage with a voltmeter or oscil

 

AC line voltage fluctuating

loscope. If fluctuations occur, correct condi

 

 

tion accordingly.

 

 

 

 

Loose or corroded connection. Wiring

Check all terminals, connections, and wiring

 

between the line, operator controls, controller,

 

faulty, incorrect, or grounded

 

and motor.

 

 

 

 

 

 

Oscillating load connected to the

Stabilize the load. Turning the IR/TACH

 

potentiometer counterclockwise may mini

 

motor

 

mize oscillations.

 

 

 

 

 

8. Unstable speed

Voltage Selection Jumpers J1, J2 or J3

See Step 5 on page 5 under, “Installing The

in wrong position

Controller.”

 

 

 

 

 

IR compensation not adjusted cor-

See the IR Compensation adjustment instruc

 

rectly

tions on page 23.

 

 

 

 

Maximum speed not adjusted correctly

See the Maximum Speed adjustment instruc

 

tions on page 23.

 

 

 

 

Motor faulty

Check motor brushes. Replace if needed.

 

Repair or replace the motor.

 

 

 

 

 

 

Tachometer generator or coupling

Repair accordingly.

 

faulty (if used)

 

 

 

 

 

Cont’d on next page

 

 

 

 

 

27

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Contents Book 0958-B Page 3 HP Book 0958-B Table of Contents List of Illustrations List of TablesBlank Following must be strictly adhered to at all times Model Types Section General Information IntroductionGeneral Description Motor Selection Installation Guidelines Section InstallationDo not use solid wire Jumper J4 Position Motor Armature Current Rating Amperes Installing the ControllerInstall the controller cover, if used Controller Mounting Configurations Controller Mounting Dimensions Logic connection diagram, Run-Stop-Jog Switch Book 0958-B Book 0958-B Book 0958-B Signal Connection Diagram, Motor Speed Potentiometer Signal Connection Diagram, Tachometer Feedback Signal Connection Diagram, 4-20mA Interface Page Initial Startup Initial Potentiometer Settings DescriptionBook 0958-B Stop Section Operation Power ON/OFFRUN JOG Speed ControlTorque Control Inoperative Motor ReverseLoad Monitor Current Loop TransducersBlank IR Compensation Section Maintenance and Repair GeneralAdjustment Instructions Acceleration DecelerationCurrent Limit Tachometer Feedback SetupMinimum Speed Corrective Action Troubleshooting Indication Possible CauseOne or more SCR‘s or Diode D1b Indication Possible Cause Corrective Action TroubleshootingTroubleshooting Indication Part Section Parts ListParts LIST, Series 2330 Mkii Controllers Fincor Part Blank 120% Section Ratings and SpecificationsOperating Conditions Operating Voltages and SignalsController Weights Performance CharacteristicsShunt Field Data AdjustmentsSpecifications Tachometer Feedback Voltage Selection Section Drawings Functional Schematic, Series 2330MKII Series 2330MKII Control Board, 1/6 3HP Blank Index Maximum Speed Book 0958-B