USER`S MANUAL
Contents
1. whatsoever An adjustment made under warranty does not void the warranty nor does it imply an extension of the original 12 month warranty period Products serviced and or parts replaced on a no charge basis during the warranty period carry the unexpired portion of the original warranty only If for any reason any of the foregoing provisions shall be ineffective the Corporation s liability for damages arising out of its manufacture or sale of equipment or use thereof whether such liability is based on warranty contract negligence strict liability in tort or otherwise shall not in any event exceed the full purchase price of such equipment Any action against the Corporation based upon any liability or obligation arising hereunder or under any law applicable to the sale of equipment or the use thereof must be commenced within one year after the cause of such action arises MINARIK DRIVES www minarikdrives com 14300 De La Tour Dr South Beloit IL 61080 Phone 800 MINARIK 646 2745 Fax 815 624 6960 Document Number 250 0219 Revision 1 Printed in the U S A August 20062. fields Avoid contact with the circuit board directly Hold drive by the chassis only Protect the drive from dirt moisture and accidental contact Provide sufficient room for access to the terminal block and calibration trimpots Mount the drive away from the other heat sources Operate the drive within the speci fied ambient operating temperature range Prevent loose connections by avoiding excessive vibration of the drive Mount drive with its board in either a horizontal or vertical plane Six 0 19 in 5 mm wide slots in the chassis accept 8 pan head screws Fasten either the large base or the narrow flange of the chassis to the subplate The Chassis must be earth grounded Use a star washer beneath the head of at least one of the mounting screws to penetrate the anodized chassis surface and to reach bare metal Wiring Use 18 AWG wire for speed adjust potentiometer wiring Use 16 AWG wire for motor wiring Twist logic wires for speed adjust potentiometer to avoid picking up unwanted electri cal noise Use shielded cable if wires are longer than 18 in 46 cm Keep logic wires away from power carrying lines or sources of electrical noise that can cause erratic operation Never run speed adjust potentiometer wires in the same conduit used for motor and AC line voltage wires 4 Installation t may be necessary to earth ground the shielded cable If noise is produced by devices other than the drive gr
3. is turned CW or the voltage signal is increased Continue until the desired speed is reached 4 Remove AC line voltage from the drive to coast the motor to a stop If the motor or drive does not perform as described disconnect the AC line voltage immedi ately Refer to the Troubleshooting section for further assistance Line starting and line stopping Line starting and line stopping applying and removing AC line voltage is recommended for infrequent starting and stopping of a drive only When AC line voltage is applied to the drive the motor accelerates to the speed set by the speed adjust potentiometer When AC line voltage is removed the motor coasts to a stop Operation 9 Decelerating to a stop A switch may be used to decelerate the motor to a stop Connect the switch as shown in Figure 5 Close the switch between S1 and S2 to stop the motor from set speed Open the switch to accelerate the motor to set speed The ACCEL DECEL trimpot setting determines the rate at which the motor accelerates and decelerates respectively cw S3 10K Ohm 32 Speed Adjust Potentiometer S1 CCW RUN STOP Figure 5 Run Decelerate to Zero Speed Switch 10 Operation Dynamic braking Dynamic braking may be used to rapidly stop a motor Figure 6 For the simplest RUN BRAKE switch use a double pole double throw switch rated for at least the maximum DC armature voltage and maximum braking current For the most
4. line for stopping the drive in an emergency This drive is not isolated from earth ground Circuit potentials are at 115 VAC above earth ground Avoid direct contact with the printed circuit board or with circuit elements to prevent the risk of serious injury or fatality Use a non metallic screwdriver for adjust ing the calibration trimpots ii Table of Contents Specifications 1 Dimensions 2 Installation 3 Mounting WINING ea tancias taria aid Rleatsinking asocia ra A Saeed A 4 Lirie F sihg ade di ii aii el 4 Speed adjustipotentioMeter cci cess mec o a 5 Connections imac a Tele ee 6 Voltage FOllOWeT cocinas dt de 7 Operation 8 Stat o APRE EE A ai o 8 Line startingand line Stopping 4 22 3 ence trast nsan le bie lueRnr4 8 Decelerating to a stop Dynamic Drakipg coste Eco a a Calibration 12 MAX SPD E A EEN EEEE EE EA E TEET E E dei 2 ACCEL DECEL 12 IR COMB sont Ai es Enee phew nid a ER EEEREN 2 CURRENT IMT norrir arina ninina ai ia nbf e emp A 3 Application Notes 15 Multiple Fixed Speeds 215 Adjustable speeds using potentiometers in serieS 02 20 ee ee eee ee 5 Independent adjustable speeds ce cece eee eee eee eee 16 RUN JOG switch Connection to other Minarik devices Leader follower application 3 cunei ncn ete emi een Bowel Se ee 18 Single speed potentiometer control of multiple drives 0 000005 18 RROVGISIM By iieri es
5. reliable control scheme use a relay with a delay on the make for the motor and use a relay with a delay on the brake for S1 S2 CCW A2 9 DYNAMIC BRAKE MOTOR RESISTOR BRAKE O 1 9 RUN Al I CW S3 1 r 1 10K Ohm 32 Speed Adjust 1 Potentiometer S1 1 1 I I 1 Figure 6 Dynamic Brake Connection Operation 11 Size the dynamic brake resistor according to the motor current rating see the table below The dynamic brake resistance listed in the table is the smallest recommended resistance allowed to prevent possible demagnetization of the motor The motor stops less rapidly with higher brake resistor values Recommended Dynamic Brake Resistor Sizes Motor Armature Minimum Dynamic Current Rating Minimum Dynamic Brake Resistor Value Brake Resistor Wattage less than 2 ADC 1 ohm 1w 2 8ADG Bohm Bw 3 5 ADC 10W 5 10 ADC O ohr 20W 10 17 ADC 40 ohm 50W For motors rated 1 17 horsepower and lower a brake resistor is not necessary since the armature resistance is high enough to stop the motor without demagnetization Replace the dynamic brake with 12 gauge wire ZA WARNING Wait for the motor to completely stop before switching it back to RUN This will prevent high armature currents from damaging the motor or drive 12 Calibration Each drive is factory calibrated to its maximum horsepower rating Readjust the calibr
6. sink part number 223 0159 when operating the drive above 5 ADC AC Line Voltage 115 VAC 10 50 60 Hz single phase Armature Voltage Range 0 130 VDC Form Factor at base speed 1 05 Acceleration Deceleration Time Range no load 0 5 6 seconds Analog Input Voltage Range isolated S1 to S2 0 10 VDC Input Impedence S1 to S2 with 5 VDC input approximately 10K ohms Speed Regulation 1 base speed or better Safety Certification UL Recognized Component file E132235 CSA Certified Component file LR41380 Ambient Temperature Range chassis drive 10 C 40 C Weight XP02 115AC 0 66 Ib XP05 115AC 0 72 Ib XP10 115AC 0 82 Ib 2 Dimensions 4 30 109 al po 3 80 97 7 lt E E S R504 R502 A e A os i gt e Na UMT 0 ee ACCEL co 6 PLACES 3 64 93 mo ix iui orca 57 E JE 0 LESI NL T e C gt 0 Oe o 0 73 19 MAX SPEED A gt C I5 gt 1 35 34 desta b o o I I 1 II II SIX MOUNTING SLOTS 0 19 5 WIDE x 0 34 9 DEEP MODEL DIMENSION A XPO2 115AC 1 77 45 XPO5 115AC 2 36 60 XP10 115AC 2 88 73 FIGURE 1 XP AC Series Dimensions Installation Mounting Drive components are sensitive to electrostatic
7. IMIT 1 10 HP 1 3 HP 90 VDC 90VDC 1 1 ADC KY 3 5 ADC CURRENT IRCOMP CURRENT IRCOMP LIMIT LIMIT 1 20 HP 1 4 HP 90 VDC 90VDC 0 56 ADC We 2 7 ADC CURRENT IRCOMP CURRENT IRCOMP LIMIT LIMIT XP10 115AC 1HP 90 VDC 10ADC CURRENT IR COMP LIMIT 3 4 HP 90 VDC 7 6 ADC CURRENT IRCOMP LIMIT 1 2HP 90VDC 5ADC CURRENT IR COMP LIMIT Figure 7 Typical CURRENT LIMIT and IR COMP Settings actual settings may vary with each application 15 Application Notes Multiple fixed speeds Replace the speed adjust potentiometer with series resistors with a total series resistance of 10K ohms Figure 8 Add a single pole multi position switch with the correct number of positions for the desired number of fixed speeds R1 S3 Total Series S2 Resistance 10K Ohms 1 R3 R4 Figure 8 Multiple Fixed Speeds Adjustable speeds using potentiometers in series Replace the speed adjust potentiometer with a single pole multi position switch and two or more potentiometers in series with a total series resistance of 10K ohms Figure 9 shows a connection for fixed high and low speed adjust potentiometers moO CW High 5K Ohm 3 Speed S2 Low S1 Speed c cw A 5K Ohm Figure 9 Adjustable Fixed Speeds Using Potentiometers in Series 16 Application Notes Independent adjustable speeds Replace the speed adjust potentiometer with a single pole multi position switch and two or m
8. PO2 115AC XPO5 115AC XP10 115AC Symbol C501 D501 Q502 R501 502 R503 R504 BR601 C501 D501 Q501 502 R501 502 R503 R504 BR601 C501 D501 Q501 502 R501 502 R503 R504 BR601 Description 220 yF 200 V Capacitor 16 A 300 V Diode Power MOSFET 0 2 Ohm 5 W Resistor 8 2 K Ohms 5 W Resistor 3 3 K Ohms 10 W Resistor 25 A 800 V Diode Bridge 10 K Ohm Potentiometer Kit 1000 pF 200 V Capacitor 16 A 300 V Diode Power MOSFET 0 05 Ohm 5 W Resistor 8 2 K Ohm 5 W Resistor 3 3 K Ohm 10 W Resistor 25 A 800 V Diode Bridge 10 K Ohm Potentiometer Kit 1500 uF 250 V Capacitor 16 A 300 V Diode Power MOSFET 0 01 Ohm 5 W Resistor 8 2 K Ohm 5 W Resistor 3 3 K Ohm 10 W Resistor 25 A 800 V Diode Bridge 10 K Ohm Potentiometer Kit Minarik P N 011 0069 071 0054 070 0043 032 0093 032 0126 032 0131 073 0007 202 0066 011 0096 071 0054 070 0043 032 0113 032 0126 032 0131 073 0007 202 0066 011 0089 071 0054 070 0043 032 0129 032 0126 032 0131 073 0007 202 0066 24 NOTES 25 Limited Warranty A Warranty Minarik Corporation referred to as the Corporation warrants that its products will be free from defects in workmanship and material for twelve 12 months or 3 000 hours which ever comes first from date of manufacture thereof Within this warranty period the Corporation will repair or replace at its sole discrection such products that are returned
9. USER S MANUAL XP AC SERIES MODELS XP02 115AC XP05 115AC XP10 115AC Pulse Width Modulated Adjustable Speed Drives for DC Brush Motors Copyright 2006 by Minarik Drives All rights reserved No part of this manual may be reproduced or transmitted in any form without written permission from Minarik Drives The information and technical data in this manual are subject to change without notice Minarik Corporation and its Divisions make no warranty of any kind with respect to this material including but not limited to the implied warranties of its merchantability and fitness for a given purpose Minarik Corporation and its Divisions assume no responsibility for any errors that may appear in this manual and make no commitment to update or to keep current the information in this manual Printed in the United States of America A Safety Warnings Have a qualified electrical maintenance technician install adjust and service this equipment Follow the National Electrical Code and all other applicable electrical and safety codes including the provisions of the Occupational Safety and Healthy Act OSHA when installing equipment Reduce the chance of an electrical fire shock or explosion by proper grounding over current protection thermal protection and enclosure Follow sound maintenance procedures Itis possible for a drive to run at full speed as a result of a component failure Install a master switch in the AC
10. a led 19 Troubleshooting 20 Replacement Parts 23 Limited Warranty inside back cover iv Illustrations Fig 1 XP AC Series Dimensions 5 roses pee sdele deur Baa Mma ds 2 Fig 2 Speed Adjust Poternitiometer o coi citant ore P EI Re es be 5 Fig 3 XP AC COnnectlons iii tirs run Ee QC A DRE 6 Fig 4 Voltage Follower Connection uis sip remp ihe iets edi aed deters 7 Fig 5 Run Decelerate to Zero Speed Switch eee eee eee eee eee 9 Fig 6 Dynamic Brake Connection slllle ml clem aa e Rez 10 Fig 7 Typical CURRENT LIMIT and IR COMP Settings 2 eee eee eee 14 Fig 3 Multiple Fixed Speeds 4 scene debit eae eae eet oa ed oak e MAT 15 Fig 9 Adjustable Fixed Speeds using Potentiometers in Series 15 Fig 10 Independent Adjustable Speeds 0 eee ee eee eee eee 16 Fig 11 RUN JOG Switch Connection to Speed Adjust Potentiometer 16 Fig 12 Connecting an XP AC Series Drive to a PCM4 or DLC600 2 Lt Fig 13 Leader Follower Application rev xr ce rs a 18 Fig 14 Single Speed Potentiometer Control of Multiple Drives 22 20 18 Fig 15 Reversing Circuit Connection oec E Dp LEX ER eee uS ES LR RT 19 Specifications Max Continuous Armature HP Range with Model Armature Current Amps DC 115 VAC Applied XP02 115AC 2 1 20 1 8 XP05 115AC 5 1 4 1 2 XP10 115AC 10 t 1 2 1 Use heat
11. a speed adjust potentiometer the drive may be wired to follow a 0 10 VDC voltage signal that is isolated from earth ground Figure 4 Connect signal input to S1 Connect the signal common to S2 Make no connection to S3 A poten tiometer can be used to scale the analog input voltage To achieve greater linearity and control use an interface device such as Minarike model PCM4 to scale the analog input voltage Follow the same wiring guidelines used for speed adjust potentiometer wiring see page 3 ZA WARNING Do not connect a non isolated input voltage signal to any XP Series drive Connecting a non isolated signal will damage the drive CURRENT LIMIT ACCEL DECEL 0 10VDC Lem s Isolated Voltage Signal Input WE s2 He 3 E MAX SPEED O IR COMP Figure 4 Voltage Follower Connections 8 Operation Startup Note Before applying power verify that no conductive material is present on the printed circuit board To start the drive 1 Turn the speed adjust potentiometer full counterclockwise CCW If the drive is follow ing a voltage signal set the voltage signal to O VDC 2 Apply AC line voltage 3 Slowly advance the speed adjust potentiometer clockwise CW If the drive is following a voltage signal slowly increase the voltage signal The motor slowly accelerates as the potentiometer
12. ation trimpot settings to accommodate lower horsepower motors All adjustments increase with CW rotation and decrease with CCW rotation Use a non me tallic screwdriver for calibration Each trimpot is identified on the printed circuit board MAX SPD The MAX SPD setting determines the motor speed when the speed adjust potentiometer is turned full CW It is factory set for maximum rated speed To calibrate set the MAX SPD trimpot full CCW Turn the speed adjust potentiometer full CW Adjust the MAX SPD trimpot until the desired maximum motor speed is reached ACCEL DECEL The ACCEL DECEL setting determines the time the motor takes to ramp to a higher or lower speed See Specifications on page 1 for approximate acceleration times The ACCEL DECEL setting is factory set to its minimum value full CCW Turn the ACCEL DECEL trimpot CW to increase the acceleration and deceleration time and CCW to decrease the acceleration and deceleration time IR COMP The IR COMP setting determines the degree to which motor speed is held constant as the motor load changes It is factory set for optimum motor regulation Recalibrate the IR COMP setting when using a lower horsepower motor Refer to the recom mended IR COMP settings on page 14 or recalibrate using the following procedure If the motor does not maintain set speed as the load changes gradually rotate the IR COMP trimpot CW If the motor oscillates overcompensation the IR COMP trimp
13. ore potentiometers in parallel with a total parallel resistance of LOK ohms Figure 10 shows the connection of two independent speed adjust potentiometers that can be mounted at two seperate operating stations 3 PER SPEED 2 cw oS 52 e SPEED 1 O 20K ohm 20K ohm s1 e Figure 10 Independent Adjustable Speeds RUN JOG switch Using a RUN JOG switch is recommended in applications where quick stopping is not needed and frequent jogging is required Use a single pole normally closed momentary operated pushbutton for the JOB pushbutton as shown in Figure 11 When the RUN JOG Switch is set to JOG the motor decelerates to zero speed Press the JOG pushbutton to jog the motor Return the RUN JOG switch to RUN for normal operation Cw S3 S1 ccw RUN E JoG Figure 11 RUN JOG Switch Connection to Speed Adjust Potentiometer JOG PUSHBUTTON Application Notes 17 Connections to other Minarik devices PCM4 1 2 DLC600 S1 S2 S3 XP AC S2 SERIES DRIVE si S3 XP AC S2 SERIES DRIVE S1 Figure 12 Connecting an XP AC Series Drive to a PCM4 or DLC600 18 Application Notes Leader follower application In this application use a PCM4 to monitor the speed of the leader motor Figure 13 The PCM4 isolates the leader motor from the follower d
14. ot may be set too high CW Turn the IR COMP trimpot CCW to stabilize the drive Calibration 13 CURRENT LIMIT The CURRENT LIMIT setting determines the maximum armature current output of the drive It is factory set at 120 of rated motor current Recalibrate the CURRENT LIMIT setting when using a lower horsepower motor Refer to the recommended CURRENT LIMIT settings on page 14 or recalibrate using the following procedure 1 With the power disconnected from the drive connect a DC ammeter 0 15 A minimum scale in series with the armature 2 Set the CURRENT LIMIT trimpot to minimum full CCW 3 Connect power to the drive The motor should remain stopped 4 Lock the motor armature Be sure that the motor is firmly mounted 5 Set the speed adjust potentiometer to maximum full CW 6 Adjust the CURRENT LIMIT trimpot CW slowly until the armature current is 120 of motor rated armature current 7 Set the speed adjust potentiometer to minimum and remove the stall from the motor ZA WARNING Although the CURRENT LIMIT can be set to exceed the motor s maximum armature current rating we recommend you do not run the motor continuously beyond that rating Continuous operating beyond the maximum armature current rating may cause thermal degradation to the motor and drive 14 Calibration XP02 115AC XP05 115AC 1 8 HP 1 2HP 90 VDC 90VDC 13ADC NA 5ADC CURRENT IRCOMP CURRENT IRCOMP LIMIT L
15. ound the shield at the drive end If noise is generated by a device on the drive ground the shield at the end away from the drive Do not ground both ends of the shield Keep logic wires away from the power carrying lines or sources of electrical noise that can cause erratic operation Heat sinking Model XP10 115AC requires an additional heat sink when the continuous armature cur rent is above 5 ADC Use Minarike part number 223 0159 All other chassis drives have sufficient heat sinking in their basic configurations Use a thermally conductive heat sink compound such as Dow Corninge 340 Heat Sink Compound between the drive chassis and heat sink surface for optimum heat transfer Line fusing Protect all Minarik drives with AC line fuses Use fast acting AC line fuses rated for 250 volts and approximately 150 200 of the maximum armature current Fuse only the hot side of the AC line L1 if using 115 VAC line voltage See the chart below for recom mended line fuse sizes Recommended Line Fuse Sizes Maximum Armature AC Line Fuse Current DC Amps Rating AC Amps 1 5 amp below 3 3 5 8 5 0 10 10 15 Installation 5 Speed adjust potentiometer Mount the speed adjust potentiometer through a 0 38 in 10 mm hole with the hardware provided Figure 2 Install the circular insulating disk between the panel and the 10K ohm speed adjust potentiometer Twist the speed adjust potentiometer wire to avoid picking up un
16. rive and outputs a voltage proportional to the leader motor armature voltage The follower drive uses this voltage reference to set the speed of the follower motor An optional ratio potentiometer may be used to scale the PCM4 output voltage Al Leader Drive A2 o TB501 PCMA W o TB502 Follower Drive s2 10K Ohm optional Figure 13 Leader Follower Application Single speed potentiometer control of multiple drives Multiple drives can be controlled with a single speed adjust potentiometer using a POM4 at the input of each drive to provide isolation Figure 14 Op ional ratio potentiometers can be used to scale the PCM4 output voltage allowing independent control of each drive ratio pot A optional 10kQ s DRIVEA s2 A2 ratio pot B optional 10KQ 5 DRIVEB s2 6 2 8 PCM4 7 1 TB501 TB502 6 2 8 PCM4 7 1 TB501 TB502 Figure 14 Single Speed Potentiometer Control of Multiple Drives Application Notes 19 Reversing A dynamic brake may be used when reversing the motor direction Figure 15 Use a three pole three positions switch rated for at least the maximum DC armature voltage and maxi mum braking current Wait for the motor to stop completel
17. that the motor is not jammed or restricted from movement 6 Check that the drive is not in current limit Recalibrate the CURRENT LIMIT trimpot if it is set too low see page 14 for recommended trimpot settings Troubleshooting 21 Fuse blows or circuit breaker trips Check all wiring for shorts grounds or misconnections Check that the drive is configured to match the motor rating Check that the motor is not jammed or restricted from movement Check that the fuse size is correct for the motor being driven Motor runs too fast at the maximum speed setting Check that the MAX SPD setting is not set too high Motor runs in the opposite direction Remove AC line voltage Reverse connections to the motor armature Motor slows under load Check that the drive has been correctly calibrated for the motor Check that the motor is not overloaded Readjust the IR COMP slightly CW until motor runs at proper speed Motor is unstable under load Readjust the IR COMP setting slightly CCW until the motor speed stabalizes 22 Troubleshooting Motor only runs at full speed 1 Check that S2 and S3 are not shorted together For additional assistance contact your local Minarik Drives distributor or the factory direct 800 MINARIK or 800 646 2745 23 Replacement Parts Replacement parts are available from Minarik Drives and its distributors for this drive series Model No X
18. to Minarik Corpora tion 14300 De La Tour Dr South Beloit IL 61080 USA This warranty applies only to standard catalog products and does not apply to specials Any returns for special controls will be evaluated on a case by case basis The Corporation is not responsible for removal installation or any other incidental expenses incurred in shipping the product to and from the repair point B Disclaimer The provisions of Paragraph A are the Corporation s sole obligation and exclude all other warranties of merchantability for use express or implied The Corporation further disclaims any responsibility whatsoever to the customer or to any other person for injury to the person or damage or less of property of value caused by any product that has been subject to misuse negli gence or accident or misapplied or modified by unauthorized person or improperly installed C Limitations of Liability In the event of any claim for breech of any of the Corporation s obligations whether express or implied and particularly of any other claim or breech of warranty contained in Paragraph A or of any other warranties express or implied or claim of liability that might despite Paragraph B be decided against the Corporation by lawful authority the Corpora tion shall under no circumstances be liable for any consequential damages losses or expense arising in connection with the use of or inability to use the Corporation s product for any purpose
19. wanted electrical noise If speed adjust potentiometer wires are longer than 18 in 457 mm use shielded cable Keep speed adjust potentiometer wires separate from power leads L1 L2 A A ZA WARNING Be sure that the potentiometer tabs do not make contact with the potentiometer enclosure Grounding the input will cause damage to the drive MOUNT THROUGH A 0 38 IN 10 MM HOLE NUT STAR SPEED ADJUST WASHER POTENTIOMETER POT TAB ASSIGNMENTS INSULATING DISK PANEL Figure 2 Speed Adjust Potentiometer 6 Installation Connections MOTOR ARMATURE Speed Adjust Potentiometer CURRENT LIMIT ACCEL DECEL LES wean He 33 cw Figure 3 XP AC Connections LINE VOLTAGE PRE WIRED Fuse hot 115 VAC leg Fuse size typically 150 motor nameplate continuous rating ASSUMPTIONS Minarik drives supply motor voltage from A and A terminals It is as sumed throughout this manual that when A is positive with respect to A the motor will rotate clockwise CW while looking at the output shaft protruding from the front of the motor If this is opposite of the desired rotation simply reverse the wiring of A and A with each other Installation 7 Voltage follower Instead of using
20. y before switching it to either the forward or reverse direction See the Dynamic braking section for sizing the dynamic brake resistor Forward O Brake NN O Reverse A2 o Dynamic Brake Resistor EH 10K Ohm Speed Adjust Potentiometer Figure 15 Reversing Circuit Connection 20 Troubleshooting ZA WARNING Dangerous voltages exist on the drive when it is powered When possible disconnect the AC line voltage from the drive while troubleshooting Be alert High voltages can cause serious or fatal injury Perform the following steps before starting any procedure in this section Disconnect AC line voltage from the drive Check the drive closely for damaged components Check that no conductive or other foreign material has become lodged on the printed circuit board Verify that every connection is correct and in good condition Verify that there are no short circuits or grounded connections Check that the drive s rated armature output is consistent with the motor rating Motor does not run 1 Check for blown fuses or tripped circuit breaker 2 Check that the speed adjust potentiometer is securely connected to S1 S2 and S3 If an input voltage signal is used check that the connections to S1 and S2 are secure 3 Check that S1 and S2 are not shorted together 4 Check that the drive recieves AC power at L1 and L2 5 Check
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