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Service Manual - Drucker Diagnostics

1. 18 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 1 PREFACE 1 1 1 2 3 1 3 2 3 3 3 4 The purpose of this manual is to provide the service technician with information for troubleshooting testing and repair of laboratory centrifuge model 755VES Only qualified technically trained personnel should attempt any of the servicing described in this document Failure to follow the procedures in this document may result in personal injury or instrument damage The Drucker Company will not be held liable for any injury or damage as a result of improper servicing Information contained within this manual is subject to change without notice INTENDED USE Model 755VES is a general purpose laboratory centrifuge intended for sample separation GENERAL DESCRIPTION OF MAJOR COMPONENTS Motor Brushless DC Motor Printed Circuit Board The PCB is the microcontroller based control center of the centrifuge All control signals are generated in the PCB Lid Locking Tray Assembly The lid tray assembly contains a solenoid and limit switch that are used to determine the state of the lid Open or Closed and to keep the lid locked during centrifugation cycles Rotor The centrifuge rotor is the main component that spins in the centrifuge The rotor is loaded with tube holders and the samples are placed into the tube holders for processing WARRRANTY INFORMATION The Druck
2. THE DRUCKER 200 Shadylane Drive Philipsburg PA 16866 Phone 814 342 6205 Fax 814 342 4510 www druckercompany com Service Manual Model 755VES Centrifuge THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue CONTENTS 17 3 2 INTENDED USE 3 GENERAL DESCRIPTION OF MAJOR 5 48 3 4 2 3 5 SPECIFICATIONS 3 6 TROUBLESHOOTING 4 7 5 5 8 252 tlds act 12 9 WIRING DIAGRAM 230V 13 10 FINALCENTRIFUGE ASSEM B 14 11 CABINET ASSEMBLY a 15 12 LOWER ASSEMBLY in 16 13 GUARD BOWLASSEMBEY 17 14 REVISION HISTORY
3. 0005 0032 14 INCH Disconnect 25 Female Yellow 3081016 amp Terminal Ring 12 10 AWG 3081011 03 1 0005 0036 16 INCH Soldered amp Soldered 03 1 0005 0027 8 INCH Soldered amp Disconnect 125 Female Red 3081010 03 1 0005 0026 11 INCH Soldered amp Disconnect 125 Female Red 3081010 03 1 0005 0032 4 INCH Disconnect 125 Female Red 3081010 amp Terminal Ring 12 10 AWG 3081011 03 1 0005 0031 6 INCH Disconnect 125 Female Red 3081010 amp Terminal Ring 12 10 AWG 3081011 03 1 0005 0037 14 INCH Soldered amp SHARED Soldered WITH 13 03 1 0005 0033 2 INCH Soldered amp Soldered 10 03 1 0005 0036 14 INCH Soldered amp SHARED Soldered WITH 14 11 03 1 0005 0033 2 INCH Soldered amp SHARED Soldered WITH 12 12 03 1 0005 0033 13 INCH SHARED Soldered WITH 11 amp Disconnect 25 Female Red 3081002 13 03 1 0005 0037 14 INCH SHARED Soldered WITH 8 amp Disconnect 25 Female Red 3081002 14 03 1 0005 0036 20 INCH SHARED Soldered WITH 10 amp Disconnect 25 Female Red 3081002 15 03 1 0005 0049 19 INCH Conn Ring Term 6 14 16 AWG 03 1 0005 0017 amp Conn Ring Term 6 14 16 AWG 03 1 0005 0017 16 03 1 0005 0037 26 INCH Disconnect 25 Female Red 3081002 amp Disconnect 25 Female Red 3081002 17 03 1 0005 0037 6 INCH Disconnect 25 Female Red 3
4. 6 32 7 8 4 3 3023001 NUT INSERT 8 32 THREAD 19 4 3056002 TRANSFORMER 115V TO 16V 2 4 3056004 TRANSFORMER 230V 16V 2 5 7728052 708 755 Feet Rubber 6 7751043 BREAKER 4A 7 7729003 842VES 853VES 755VES BRIDGE RECTIFIER 8 3003007 SPACER LINE FILTER ALUMINUM 2 9 7751041 642 755 LINE FILTER 1 9 7751042 642 755 LINE FILTER 230V 1 10 3022002 NUT 6 32 NYLOK SILVER 3 11 3033003 WASHER 8 FLAT SILVER 17 12 3012007 SCREW PHILLIPS 8 32 0 50 LONG 10 13 3033005 WASHER 6 INTERNAL TOOTH 1 14 7729004 842VES 853VES 755VES POWER SUPPLY CAPACITOR 1 15 3021001 NUT 6 32 HEX SILVER 1 16 3022005 NUT M8 NYLOK SILVER 1 17 3033001 8 SPLIT LOCK WASHER 13 18 3012006 SCREW 8 32 x 0 375 PAN HEAD PHILIPS SILVER 7 19 7710350 755 Guard Bowl Motor Mount Assembly 1 20 7713027 614 642 643 755 EXHAUST AIR DEFLECTOR 1 21 7786015 6 PLACE STANDARD ROTOR 1 22 3012033 SCREW 10 32 X 1 2 SHCS 1 23 3033016 WASHER 1 ONLY USED IN 115V CENTRIFUGES ONLY USED IN 230 V CENTRIFUGES THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 16 13 GUARD BOWL ASSEMBLY ITEM NO PARTNUMBER DESCRIPTION QTY Fpa 7 1 3012031 SHOULDER BOLT SOCKET HEAD 10 3
5. Connect the two motor connectors to J2 and J12 on the PCB IMPORTANT Remove the screwdriver before continuing i Carefully place the cabinet onto the base taking care not to pinch any wires between the two j Complete the assembly by replacing the eight 8 screws washers and lock washers with a 2 Phillips driver THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 11 8 WIRING DIAGRAM 115V MODELS WIRE IDENTIFICATION AND LENGTH 03 1 0005 0031 14 INCH 03 1 0005 0032 14 INCH 03 1 0005 0025 16 INCH 03 1 0005 0065 8 INCH 03 1 0005 0064 11 INCH 03 1 0005 0032 4 INCH 03 1 0005 0031 6 INCH 03 1 0005 0030 14 INCH 03 1 0005 0029 14 INCH 10 03 1 0005 0030 14 11 03 1 0005 0029 20 INCH 12 03 1 0005 0028 19 INCH 13 03 1 0005 0029 28 14 03 1 0005 0019 26 INCH 15 03 1 0005 0024 6 INCH 16 03 1 0005 0028 6 INCH gt Left Transformer Right Transformer CONNECTOR IDENTIFICATION DISCONNECT 25 FEMALE YELLOW 3081016 DISCONNECT 125 FEMALE RED 3081010 DISCONNECT 25 FEMALE YELLOW 3081016 ID DISCONNECT 125 FEMALE RED 3081010 TERMINAL RING 12 10 AWG 3081011 F TERMINAL RING 12 10 AWG 3081011 G TERMINAL RING 12 10 AWG 30
6. is under set speed for too long some models All carriers must be installed whether full or SPEED empty a Check the lid and guard bowl gaskets Voids in the rotor Rotor Speed is under set speed for too long chamber gaskets change the airflow resulting in increased stress on the motor drive Rotor speed is over set speed for too long Service required Load equally filled tubes symmetrically in the rotor All Rotor improperly loaded carriers and or tube holders must be present in the rotor BALANC whether loaded or empty Debris lodged within the rotor or tube Carefully inspect all rotor pockets tube holders and carriers crevasses for debris Rotor damaged Replacement required ROTOR Software selection of rotor is unknown Service Required Call Drucker technical service THE DRUCKER COMPANY MODEL 755VES SERVICE MANUAL SM002 REV Original Issue 7 SERVICE INSTRUCTIONS 7 1 Cleaning a The cabinet rotor top and accessories shall be thoroughly cleaned using soap and water isopropyl alcohol or a mild bleach solution b Under no circumstances should any of the following be used Fully Partially Halogenated Hydrocarbons Ketones and Esters c Use of any chemicals not prescribed by the manufacturer may cause damage to the rotor and tube carriers holders and shall not be used 7 2 Removing the Rotor a Use 5 32 hex key to loosen the center rotor screw turn counter clockwise b Lift the rotor straight
7. up and out of the rotor chamber c To install the rotor reverse steps A and B above Take care to align the hub spines and or shaft cross pin with the rotor hub Tighten the rotor screw by hand until snug Complete the installation by tightening the screw an additional turn 7 3 Maintaining the Rotor a Keep the rotor clean any corrosive materials must not be allowed contact with the rotor and should be cleaned immediately b The rotor should be checked periodically for signs of wear c Remove the rotor from service if any of the following are found cracks deep scratches corrosion or discoloring 7 4 Rotor Screw a If the rotor screw needs to be tightened use a 5 32 hex key and tighten it by hand until snug continuing an additional turn to achieve sufficient torque 7 5 Speed Calibration a Check the centrifuge speed periodically we recommend every two years b Important When verifying rotor speed make certain that all carriers are installed in the rotor No calibration adjustment of speed can be made only a verification of rotor speed 7 6 Line Leakage a Check the centrifuge s line leakage periodically we recommend every two years b All Drucker centrifuges currently manufactured are classified as laboratory equipment per the requirements of UL 61010 1 Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements This standard specifies that the maximum curre
8. 081002 amp Disconnect 25 Female Red 3081002 18 03 1 0005 0049 6 INCH Disconnect 25 Female Red 3081002 amp Conn Ring Term 6 14 16 AWG 03 1 0005 0017 19 03 1 0005 0049 10 INCH Conn Ring Term 6 14 16 AWG 03 1 0005 0017 amp Conn Ring Term 6 14 16 AWG 03 1 0005 0017 OOBONOOARWNH Ground Stud on Base GREEN Wire to Cabinet Ground Stud Six Position Connector to J4 on Centrifuge Control Board WARNING Make sure that the correct To Centrifuge polarity is 2 Control Board used when N 212 connecting to Power Button Left Transformer Right Transformer Bridge Rectifier Capacitor the capacitor Line Filter 0 Oo The negative 1 Plug side of the Motor capacitor is labeled with a minus Motor Plug To sign Centrifuge Control Board J2 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 13 10 FINAL CENTRIFUGE ASSEMBLY ITEM NO PART NUMBER DESCRIPTION QTY 1 OEM SPECIFIC 755 VES LOWER ASSEMBLY 1 2 OEM SPECIFIC 755VES CABINET amp LID ASSEMBLY 1 3 3033003 WASHER 8 FLAT SILVER 8 4 3033001 8 SPLIT LOCK WASHER 8 5 3012007 SCREW PHILLIPS 8 32 0 50 LONG 8 6 7724026 SERIAL NUMBER 1 7 OEM SPECIFIC CARRIER REPLACEMENT LABEL 1 8 OEM SPECIFIC
9. 2 1 0 LONG 3 J i 2 3033019 FENDER WASHER 1 00 OD 17 64 ID 0 048 THK 3 3 3012007 SCREW PHILLIPS 8 32 0 50 LONG 4 4 7710346 ELASTOMER BUSHING 3 2 5 7710347 ELASTOMER GROMMET 3 6 7710349 755 GUARD BOWL FOR SUSPENSION MOUNT 1 7 3022004 10 32 NYLOCK NUT 3 8 3062003 1 8 x 5 8 ROLL PIN 1 9 7735016 755 853 BLDC MOTOR 1 10 7710345 SUSPENSION MOTOR MOUNT PLATE 1 11 3033001 8 SPLIT LOCK WASHER 4 12 7732019 Gasket Rotor Chamber 1 13 7732018 MOTOR WELL GASKET 1 14 3023001 NUT INSERT 8 32 THREAD 6 C 10 4 2 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 17 14 REVISION HISTORY Revision Date Details of Change Original 07 07 2013 Original Issue DR 2958 THE DRUCKER COMPANY MODEL 755VES SERVICE MANUAL 5 002 REV Original Issue 18
10. 81011 H TERMINAL RING 12 10 AWG 3081011 1 CONN RING TERM 6 14 16 AWG 03 1 0005 0017 J DISCONNECT 25 FEMALE RED 3081002 DISCONNECT 25 FEMALE RED 3081002 L DISCONNECT 25 FEMALE RED 3081002 IM DISCONNECT 25 FEMALE RED 3081002 IN DISCONNECT 25 FEMALE RED 3081002 DISCONNECT 25 FEMALE YELLOW 3081016 DISCONNECT 25 FEMALE RED 3081002 DISCONNECT 25 FEMALE RED 3081002 IR DISCONNECT 25 FEMALE YELLOW 3081016 5 DISCONNECT 25 FEMALE YELLOW 3081016 CONN RING TERM 6 14 16 AWG 03 1 0005 0017 U CONN RING TERM 6 14 16 AWG 03 1 0005 0017 Six Position Connector to J4 on Centrifuge Control Board Ground Stud on Base WARNING Make sure that the correct polarity is used when connecting to the capacitor The negative 1 side of the Circuit Breaker capacitor is labeled with minus sign THE DRUCKER COMPANY MODEL 755VES SERVICE MANUAL 5 002 REV Original Issue 999 N Line Filter Plug 12 To Centrifuge Control Board 412 Motor Motor Plug To Centrifuge Control Board J2 9 WIRING DIAGRAM 230V MODELS Wire Identification Length and Connections 03 1 0005 0031 14 INCH Disconnect 25 Female Yellow 3081016 amp Terminal Ring 12 10 AWG 3081011 03 1
11. FACTORY CALIBRATION LABEL 1 9 OEM SPECIFIC FRONT PANEL LABEL 1 THE DRUCKER COMPANY MODEL 755VES SERVICE MANUAL 5 002 REV Original Issue 14 11 CABINET ASSEMBLY ITEM NO PART NUMBER DESCRIPTION QTY 1 7710171 755VES CABINET POWDER COATED 1 2 7717049 CYCLE COUNTER 1 3 7751072 755 Switch Power Illuminated 1 4 3051001 STUD 6 32 7 8 11 5 7732018 MOTOR WELL GASKET 1 6 7745017 642 755 LID TRAY ASSEMBLY 1 7 3022002 NUT 6 32 NYLOK SILVER 11 8 3003002 STANDOFF 320 x 203 642 BOARD MOUNT 7 9 7728102 755 GROMMET HEAT SINK MOUNT 2 10 7717041 VES PCB ASSEMBLY 1 11 3033002 WASHER 6 FLAT NYLON WHITE 7 12 3033003 WASHER 8 FLAT SILVER 2 13 3023001 NUT INSERT 8 32 THREAD 4 14 7713007 0 062 KYDEX HINGE SPACER 2 15 7713003 HINGE SPACER 2 16 7724071 FRICTION HINGE 2 17 3012009 SCREW 8 32 x 1 00 PAN HEAD PHILLIPS SILVER 4 18 02 002 1 0001 755 LID ASSEMBLY 1 19 3012004 SCREW 6 x 375 PH PHIL SELF TAP BLUNT SILVER 4 20 OEM SPECIFIC UNLOCKING INSTRUCTION LABEL 1 21 OEM SPECIFIC LABEL OPEN CLOSE 1 22 OEM SPECIFIC LABEL STOP 1 4 THE DRUCKER COMPANY MODEL 755VES SERVICE MANUAL REV Original Issue 15 12 LOWER ASSEMBLY ITEM NO PART NUMBER DESCRIPTION QTY 1 7710170 755VES Cabinet Base 1 2 3051001 STUD
12. c sensitive components b The PCB is held in place with nine 6 Nylok nuts and plastic insulator washers Use a 5 16 nut driver to remove the nuts The PCB and washers are now free to slide off the threaded studs c Beneath the PCB are seven plastic standoffs If they are crushed replace them before reassembly THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue d e f g h k To install the PCB make certain that seven plastic standoffs and two rubber spacers are present on the control panel studs Slide the board onto the studs Install seven plastic washers onto the studs securing the circuit card Install two conventional 6 washers onto the heat sink studs Important Secure the heat sink side of the PCB first and tighten the Nylok nuts until the stud protrudes past the Nylok Nut by only one thread Important over tightening the PCB nuts will cause malfunction Each nut sets the height of a separate control panel switch Too low and they cannot be actuated too high and they jam against the front panel label and are always in the ON state The remaining 7 nuts should be tightened only until the buttons on the control panel click when pressed do not over tighten Each nut sets the height of a separate control panel button Tighten each nut a turn in succession trying each corresponding button as YOU go Once each control panel button clicks when pressed installation
13. er Company warrants its centrifuges to be free from defects in workmanship and parts for two years 5 SPECIFICATIONS Maximum Speed 4300 RPM Maximum RCF 3150 Maximum Capacity 24 Tubes 17 x 100mm 12 Tubes 17 x 125mm Dimensions in 9 0 x 14 5 W x 16 5 L Environmental Operating Range 2 40 deg C Typical Noise Level At Maximum Speed lt 70dBA Electrical Ratings 115VAC Version 115VAC 10V 230VAC Version 230VAC 20V THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 6 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION The lid does not open No Power Check removable line cord No Power Check circuit breaker on underside of centrifuge No Power Check wall outlet Lid knob is ajar Rotate the lid knob fully clockwise before pressing the OPEN button Lid lock is active Unlock timed out Press the OPEN button to de activate the lid Lid tray is unplugged from PCB or defective Requires service PCB is damaged Requires service To gain access to the rotor Remove the OPEN CLOSE sticker and slide the lid latch lever toward the front of the centrifuge This will unlock the lid PROBLEM POSSIBLE CAUSE SOLUTION Excessive vibration Rotor improperly loaded Load equally filled tubes symmetrically in the rotor All carriers and or tube holders must be p
14. hat no wires are pinched between the guard bowl and base i IMPORTANT Tuck a portion of the motor wire harness into the rectangular cutout in the base See fig 1 Figure 1 j IMPORTANT Make certain that the base assembly wires are routed between the base and the threaded screw inserts See fig 2 Figure 2 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue Fasten the guard bowl to the base with six each 8 screw washer and lock washers 1 Install the exhaust air cover with 3 each 8 screw washer and lock washers Make certain that the motor wire harness is contained within the cover s wire channel See fig 3 Fig 3 m Replace the zip tie removed in 6 11 n The lower assembly is complete 7 13 Power Connections and Final Assembly IMPORTANT These steps must be followed to avoid personal harm and to avoid damaging the PCB d Make certain that the lower assembly has been unplugged from the mains supply for at least 10 minutes Use a Volt meter to measure the DC voltage across the power supply capacitor IMPORTANT Do not continue until the voltage is below 0 5 V DC See fig 4 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 10 f Once the voltage is below 0 5 V DC short the capacitor with a screwdriver See fig 5 Fig 5 g Connect the power leads to the PCB The positive lead red goes to J10 Negative black lead goes to J11 h
15. is complete IMPORTANT Do not connect the power supply to the PCB yet Follow the instructions in section 6 13 7 11 Removing the motor a b 9 f g h i Remove the cabinet assembly by following 6 8 Cut and remove all wire harness zip ties Flip the base assembly up side down and remove the three exhaust air channel screws with a 2 Phillips driver Set the exhaust cover aside The guard bowl is held in place with six 8 screws Remove them with a 2 Phillips driver Lift the base assembly off of the guard bowl and set it aside Flip the guard bowl The motor is held in place with 4 8 Nylok nuts Remove them with an 11 32 nut driver Slide the motor and motor gasket out of the guard bowl s motor well 7 12 Replacing the motor a b Make certain that a new gasket is used when installing a motor Locate the seam on the inside of the guard bowl wall Position the motor so its wires exit approx 180 deg away from the guard bowl seam THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 8 d Install the motor and gasket into the guard bowl with the wire harness positioned as described above Drive 4 8 Nylok nuts onto the motor studs with 11 32 nut driver f Turn the guard bowl assembly upside down with the guard bowl seam facing you g Place the base assembly with transformers facing you onto the guard bowl h IMPORTANT Make certain t
16. nt levels between any accessible parts are as follows THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 5 In normal condition the maximum current flow between accessible parts is 0 5 RMS for sinusoidal waveforms 0 7mA peak for non sinusoidal waveforms or mixed frequencies or 2mA DC In single fault condition the maximum current flow between accessible parts is 3 5mA RMS for sinusoidal waveforms 5mA peak for non sinusoidal waveforms or mixed frequencies or 15mA DC 7 7 Ground continuity a Check the centrifuge s ground continuity periodically we recommend every two years b Disconnect the manufacturer s supplied power cord from the power supply c Measure the resistance between the ground tab of the line cord and an exposed clean unpainted metal surface contiguous to the chassis main frame d The maximum acceptable ground resistance is 0 1 Ohms 7 8 Removing the Cabinet Upper Housin a There are eight screws that fasten the centrifuge cabinet to the base b Begin by unplugging the centrifuge and waiting 10 minutes for internal voltages to dissipate Use a 2 Phillips screwdriver to remove the cabinet screws three on left and right sides two in the rear d The cabinet control panel is attached to the base internally with cable harnesses Be careful not to stress the cables when removing the cabinet e Stand directly in front of the centrifuge and lift the cabinet straight u
17. p and off the base setting it down on its right side f Gently remove the power supply and motor harnesses from the PCB a Use a Volt meter to measure the DC voltage across the power supply capacitor IMPORTANT Do not continue until the voltage is below 0 5 V DC See fig 4 THE DRUCKER COMPANY 5 002 MODEL 755VES SERVICE MANUAL REV Original Issue 6 b Once the voltage is below 0 5 V DC short the capacitor with a screwdriver See fig 5 Fig 5 c Service may continue once the capacitor is drained 7 9 Replacing the Lid Tray Assembly a The lid tray assembly is accessible once the cabinet has been removed b Gently remove the lid tray wire harness from the PCB c The lid tray assembly is held in place with two 6 Nylok nuts Use a 5 16 nut driver to remove the nuts The tray will slide off the threaded studs d Early models used a plastic spacer between the tray assembly and the metal cabinet A spacer is no longer needed IMPORTANT Remove any plastic spacer that may be present e To install the lid tray slide it onto the studs and secure it with two 6 Nylok nuts hand tight f Complete the installation by gently plugging the wire harness into the PCB header J4 The header and connector are keyed for proper orientation 7 10 Replacing the PCB a The PCB is accessible once the cabinet has been removed Make certain that all wire harnesses have been disconnected Use standard precautions for handling stati
18. resent in the rotor whether loaded or empty Debris lodged within the rotor or tube carriers Carefully inspect all rotor pockets tube holders and crevasses for debris Centrifuge housing is loose Requires service Missing damaged feet Requires service Motor failure Requires service Rotor damaged Replacement required PROBLEM POSSIBLE CAUSE SOLUTION Rotor does not spin No Power Check removable line cord No Power Check circuit breaker on underside of centrifuge No Power Check wall outlet Lid not properly latched Press down firmly on lid and rotate lid knob clockwise until the LATCHED light illuminates Internal connection failure Requires service PCB failure Requires service Motor Failure Requires service PROBLEM POSSIBLE CAUSE SOLUTION Clicking noise during braking Rotor is loose Tighten rotor screw per section 7 2 PROBLEM POSSIBLE CAUSE SOLUTION Whistling noise while running Debris in air intake exhaust ports Remove power before clearing debris Gasket failure Requires service PROBLEM POSSIBLE CAUSE SOLUTION Error message is displayed OVRSPD Rotor speed is too great Internal error Service required Rotor Speed is under set speed for too long Check power supply Check rotor Missing carriers can reduce rotor speed in Rotor Speed

Service Manual - Drucker Diagnostics

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