QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI REPAIR INSTRUCTIONS Automatic hot-wedge welding machine COMET Production code from 0024028 Software version CSE 03 from 1.5 Software version CSE 06 without USB from 2.0A Software version CSE 06 with USB from 3.0A © 2009 LEISTER Process Technologies, CH-6056 Kaegiswil These repair instructions may not be distributed or reproduced in part or in whole in any form without prior written consent from LEISTER Process Technologies, CH-6056 Kaegiswil LEISTER Process Technologies, CH-6056 Kaegiswil/Switzerland, www.leister.com Tel +41 41 662 74 74 Fax +41 41 662 74 16 leister@leister.com QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Table of contents 10 11 12 13 14 15 16 Scope of applicability Safety precautions Remarks Check mechanics Assembly and adjustment 5.1 Assembly of tension lever (version without force sensor) 5.2 Assembly of tension lever (version with force sensor) 5.3 Adjustment of hot-wedge and guide rollers 5.4 Assembly of guide aids (version for subroofchannel) Electronics 11 6.1 Opening housing cover 11 6.2 Power supply cord 11 6.3 Wiring 12 6.4 Main switch 13 6.5 Triac 14 Drive unit 14 7.1 Function check 14 7.2 Electronic circuit board STV 02 15 7.3 Power supply 16 7.4 Electronic circuit board ZPM 02 16 7.5 Short circuit test of bridge rectifier on ZPM 02 board 17 7.6 Disassembly of the housing lower part 17 7.7 Check MOSFET on ZPM 02 board 18 7.8 Check carbon brushes 19 7.9 Check drive motor 20 7.10 Replacement of the drive unit 21 Check heater unit 23 8.1 Check thermocouple 23 8.2 Check hot-wedge 24 8.3 Function check of heating 24 8.4 Hot-wedge supervision 25 Check force sensor and USB port (optional) 26 9.1 Force sensor 26 9.2 USB port 26 Setup menu 27 10.1 Setup menu CSE 03 27 10.2 Setup menu CSE 06 without USB port 28 10.3 Setup menu CSE 06 with USB port 29 Settings 30 Possible causes of trouble 32 Wiring diagram 33 Test procedure for COMET (protection class I) 34 Equipment required for LEISTER repair service 36 Appendix screw locking 37 QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Scope of applicability These repair instructions are reserved exclusively for LEISTER service centres Only experienced and qualified personnel trained by LEISTER Process Technologies, CH-6056 Kaegiswil, are allowed to repair work on LEISTER tools Additional national requirements relative to personnel carrying out repair work are to be observed by each service centre Safety precautions A well-equipped working place (see "Equipment required for LEISTER repair service") is essential for doing qualified work For safety reasons use only identical original LEISTER replacement parts for each type of tool when servicing Warning! If you open the tool or remove its parts, except the ones they are accessible without using a tool, some life parts could appear Its contact can cause danger to life! Insure tool is disconnected from the line/mains before any work is commenced Repaired tools must pass the LEISTER test procedure and any additional local requirements Check with your local Statutory Authority for testing requirements Remarks • If it is impossible to repair a tool, it should be returned immediately to the manufacturer, LEISTER Process Technologies, CH-6056 Kaegiswil, Switzerland, carriage paid to Kaegiswil LEISTER will repair the tool within 24 hours after its arrival • When ordering spare parts use the order numbers of the spare parts list When servicing use only identical original LEISTER replacement parts! QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Check mechanics • Check smooth movement of eye bolts and set nut: Parts have to be easily turned without any physical effort, otherwise they are to be replaced (Overload: maximum pressure = 1000N = 225lbs) • Check undercarriage for cracks and deformations • Check roller chains and sprocket wheels and replace them if necessary • Check all moving parts for smooth running and replace them if necessary • Clean all polluted parts • Lubricate all moving parts with unpolluted grease, chains with chain oil Lubricate these parts with grease (e.g Microlube GBUY 131), chains with chain oil: Lubricate guide bar with teflon spray (e.g Fin Lube Tf) Duplex roller chain and sprocket wheels in the tower Roller chain and sprocket wheels in the tension arm Lubricate axle of downholder rollers with high-temperature grease, e.g Molykote P-74 Roller chain and sprocket wheels in the undercarriage Pivot point of tension arm QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Assembly and adjustment The assembling has to be carried out according to the exploded diagrams and the spare parts lists • Make sure that there are no other particles than the essential grease inside the toothed wheel work • Assemble chains and apply chain oil Ensure that the closed end of the chain’s master link is installed in rotation direction • Center the roller with set screws Then, loosen one set screw for ¼ rotation and fix both set screws by using the lock nuts • When installing the swivel head, screw-in the set screw at least flush and equalize so that the swivel head is parallel to the tension arm • To fix the tension arm, screw-in the set screw completely, loosen for ½ rotation and tighten it with lock nuts " Notes • Ensure which screws are to be locked by using Loctite 242 prior to the tool assembly or its components Therefore the appendix (chapter 16) contains exploded diagrams highlighting all screws to be locked • When using the machine under hard conditions and over a long time, the chains should be replaced as a precaution • If torn chains or broken teeth of the sprocket wheels are detected, check the shafts for concentric running and replace them if necessary QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 5.1 Assembly of tension lever (version without force sensor) Tighten the tension lever attachment screw in such a way, that smooth actuating is possible, but the tension lever remains stable in all positions Screw the set nut between position and on the eye bolt threaded on the left and turn one rotation to position 6; check whether it is fixed Then turn three rotations and three numbers further Attach the eye bolt threaded on the right and turn it to the top Adjust tension lever top limiting screw to a length of 15mm; fix by lock nut Adjust lower limiting screw so that the tension lever stops proximately after locking QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 5.2 Assembly of tension lever (version with force sensor) Tighten the tension lever attachment screw in such a way, that smooth actuating is possible, but the tension lever remains stable in all positions Attach force sensor to the eye bolt threaded on the right and turn in to the end stop Adjust tension lever top limiting screw to a length of 15mm; fix by lock nut Adjust lower limiting screw so that the tension lever stops proximately after locking QM Repair instructions COMET PROCESS TECHNOLOGIES Revision: B Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 5.3 Adjustment of hot-wedge and guide rollers Hot-wedges with cartridges Adjust eccentric of guide roller to bottom left of the undercarriage Distance to the floor is equal to the tape thickness plus 1mm cartridges and cartridges Hot-wedges with or cartridges Center the guide roller, farther from the drive roller, with the undercarriage, horizontally in direction of the pressure roller Insert two pieces of the tape to be welded Set pressure force to zero If the material is unknown, the adjustment is made with PE 2.5mm Tension with 1000N 2/3 1/3 Move the hot-wedge to the front and tighten hexagon head screw M6 x 20 Having a hot-wedge with cartridges both guide rollers and the pressure roller must show a line The center guide roller remains approx 2mm below this line Having a hot-wedge with or cartridges the guide roller, located closer to the drive rollers, must be moved clockwise to the tape and has to be fixed in such a way, that both guide rollers have the same smooth running QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B 5.4 Assembly of guide aids (version for subroofchannel) Setup menu settings (see chapter 10) Gear: Min speed: Max speed: " • 144:1 1.8m 6.0m Note Lock screws pos 62** by using Loctite 624 Page / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Welding direction Page 10 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Top view Detail on the left Detail on the right Marking against welding direction " • Marking in welding direction Note Observe markings on drive roller end pins pos 61 for correct directional stability! QM Repair instructions COMET PROCESS TECHNOLOGIES Revision: B Page 25 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 8.4 Hot-wedge supervision Display indication Possible failure(s) Function course of machine **ERROR100** Turn Power off • Triac does not work • Break contact of heating cartridge(s) • Short circuit of thermocouple signal conductors Cold start performance: If the actual value is < 80°C after 90 seconds, the heating power is going to turn off **ERROR100** Turn Power off • Short circuit of thermocou- During normal operation: Supervision actuates on all ple signal conductors temperatures **ERROR101** Turn Power off • Triac does not work • Break contact of heating cartridge(s) • Short circuit of thermocouple signal conductors • Undervoltage: temperature drifts more than 30°C • Welding temperature adjustment more than 30°C Operating temperature reached: Heating power is going to be turned off after 15-20 seconds **ERROR101** Turn Power off • Break contact of thermocouple ground conductor Supervision may actuate from 400°C (depending on the insulation resistance of the thermocouple) **ERROR101** Turn Power off • Break contact of tool protective earth conductor Supervision may actuate from 400°C (depending on the insulation resistance of the thermocouple and/or the cartridges) **ERROR102** Turn Power off • Break contact of a thermo- Heating remains off; hotwedge is protected couple signal conductor Normal display • Short circuit of triac and short circuit of thermocouple signal conductors during heating-up Not supervised! Heating cartridges may burn out; duration of the not supervised state approx 2-3 minutes! QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 26 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Check force sensor and USB port (optional) Opening of the housing cover see chapter 6.1 9.1 Force sensor • • • • Check connections in the angled plug Check cable of force sensor Check screw fitting of force sensor for tight fit Check poles ribbon cable of force sensor connection Visual inspection PIN1 Red PIN2 Yellow PIN3 Shielding Angled plug of force sensor: Plug must be screwed properly poles ribbon cable of force sensor Replacement of force sensor see chapter 5.2 9.2 USB port Check cable of USB connection an poles plug Function check of USB recording see chapter 14 " Notes • If a new USB stick is used, this must be formatted in format FAT 32 with memory size 512 bytes • Important: Always test new USB sticks on the device! Sometimes not all USB sticks work with the device This can depend on USB design or on preinstalled software which wants to start up automatically, for example QM Repair instructions COMET PROCESS TECHNOLOGIES Revision: B Page Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 10 Setup menu 10.1 Setup menu CSE 03 Switch on and press green Save - + Adjust settings red Enter code Next Geräte-Typ: Comet green +/- : select Twinny T red Getriebe 210:1 +/- : select 144:1 148:1 256:1 green red I-Gain 100 * green +/- : select red I-Offset +50 ** green +/- : select red Strom max 500mA +/- : select green red Max Geschw 3.20m/min green +/- : select red Min Geschw 0.80m/min green +/- : select red Max Temperatur 420°C green +/- : select red Temp Offset +0°C green +/- : select red Display Unit ‘-‘>C/m,‘+‘>F/ft + Store Parameter ‘-‘->no,‘+‘->yes + 0.00 3.20 20 420 * Gain ** Offset 27 / 39 QM Repair instructions COMET PROCESS TECHNOLOGIES Page Revision: B 28 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 10.2 Setup menu CSE 06 without USB port Modifications in the setup menu will be saved automatically Press at the same time M - + Adjust settings H and switch the tool on „WRONG KEY COMB TURN POWER OFF“ Enter code (HMHH+-) H press press H press H press H H H H + select M Serial Number H - Tool-Type Comet M year 00 week serial number 00 000 Gear 210:1 - + select I-Gain 100 - + set I-Offset - + set Max current 530mA - + set Max Speed 3.2m/min - + set Min Speed 0.8m/min - + set Max temperature 420°C - + set Temp Offset +0°C - + set Display Unit `-`>C/m, `+`>F/ft - + select press press press press 0.0 3.2 20 350 QM Repair instructions COMET PROCESS TECHNOLOGIES Page Revision: B 29 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 10.3 Setup menu CSE 06 with USB port Modifications in the setup menu will be saved automatically Press at the same time M - + Adjust settings H and switch the tool on „WRONG KEY COMB TURN POWER OFF“ Enter code (HMHH+-) H press M Serial Number H press H press H press H H H H H H - Tool-Type Comet + select M year 00 M week serial number 00 000 Gear 210:1 - + select I-Gain 100 - + set I-Offset - + set Max current 530mA - + set Max Speed 3.2m/min - + set Min Speed 0.8m/min - + set Max temperature 420°C - + set Temp Offset +0°C - + set USB-Stick? `-`>no, `+`>yes - + select F-Offset - + set F-Gain 100 - + set Display Unit `-`>C/m, `+`>F/ft - + select press press press press press press 0.0 3.2 20 350 QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 30 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 11 Settings Enter the setup menu • Set main switch to "0" (OFF) position and connect tool to rated voltage • Press all of the four buttons at the same time and set the main switch to "1" (ON) position, then enter code: H M H H + Î CSE 03: By pressing button M the setting will be saved and the cursor jumps to the next menu item By pressing button H the cursor jumps to the next menu item CSE 06: By pressing buttons or M the setting will be saved and the cursor jumps to the next menu item • • • • • • • • • • • • • Select tool type Comet Enter serial number year | week| three digit number Select gearing 210:1| 148:1|144:1|256:1 Enter I-Gain and I-Offset according to tag on electronic circuit board ZPM 02 Max current Ỵ see adjustment of current limit Max speed confirm display value Min speed confirm display value Max temperature 420°C Offset temperature 0°C USB port * "yes" / "no" Enter P-Gain and P-Offset * Ỵ see check force load cell Select temperature indicator °C or °F Set main switch to "0" (OFF) position and wait for two seconds (Ỵ Settings will be saved) Then set main switch to "1" (ON) position again * version with USB recording only QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 31 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Adjustment of current limit • Set main switch to "0" (OFF) position and connect tool to rated voltage using an analogue ammeter in series • Press buttons H and M at the same time an set the main switch to "1" (ON) position • Then enter code: H M H H + • Clamp a PE tape (thickness 2.5mm) and adjust force to 900 1000N • Start drive by pressing M and set speed to maximum by using button + (depending on gearing) • Slowdown the tool until the ammeter shows the current according to the table Rated voltage Current 230V 650mA 200V 700mA 120V 1000mA • Read the shown current value in the center of the upper display line This value is the current limit value and must be entered • Press button H • Adjust the determined value for the current limit by using keys - and + (center of the lower display line) • Stall the tool during operation Ä Drive unit must turn off! Date and time adjustment (version with USB recording only) • • • • Press buttons - and + at the same time Select menu item "Date/Text" by using button + Select menu item "Set Date" by using button + Adjust time and date Use buttons - and + for adjustment and confirm with button H Caution: If the given number exactly agrees with the intended setting, always verify by using buttons - and + if definitely the correct number is stored! Example: The number 165 may also be displayed as 16 If the value 16 is stored, it will change to 15, respectively 17, by one-time pressing of buttons - or + If the value keeps at 16, press button - as long as the designated value appears • Exit menu by using button M Check force load cell (version with USB recording only) • If the force load cell shows a force on the display with released tension lever, the force may be reset by using item F-Offset in the setup menu • The actual measured force will be displayed in the upper line on the right • Release tension lever and adjust F-Offset by using buttons - and + until the display shows "0" • If the force load cell needs to be calibrated, the tool must be sent to LEISTER Process Technologies, CH-6056 Kaegiswil, Switzerland QM Repair instructions COMET PROCESS TECHNOLOGIES Page Revision: B 32 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 12 Possible causes of trouble • No indication on the display Check wiring Check electronic circuit board STV 02 Check power supply 5VDC Connect electronic circuit board CSE 06 temporarly Check thermocouple (short circuit) chapter 6.3 chapter 7.2 chapter 7.3 chapter 8.1 • Drive motor does not run or stops immediately Check wiring (ribbon cable: break or short circuit) Check power supply by using test board Check electronic circuit board STV 02 Check carbon brushes of drive motor Check electronic circuit board ZPM 02 chapter 6.3 chapter 7.3 chapter 7.2 chapter 7.8 chapter 7.4 • Tool does not heat Check wiring Check power supply by using test board Check electronic circuit board STV 02 Connect electronic circuit board CSE 06 temporarly Check setup adjustments (Comet) Check DIP switch configuration Defective triac chapter 6.3 chapter 7.3 chapter 7.2 chapter 10 • Tool heats all the time Check triac Check electronic circuit board STV 02 Connect electronic circuit board CSE 06 temporarly chapter 6.5 chapter 7.2 • Bad welding quality Check hot-edge adjustment Check heating cartridges chapter 5.3 chapter 8.2 • For options force sensor and USB port only No force value on display No data recording chapter 9.1 chapter 9.2 Error 101: Possible due to undervoltage During the welding procedure the temperature variation may not exceed 30°C Check DIP switch configuration ON OFF ON ON OFF OFF ON OFF - Motor - blue/blau Motor + red/rot Driv e Motor/Antriebsmotor Optional ZPM 02A Rev G Neutral 230V Motor black/Nullleiter 230V Motor schwarz Line 230V Motor black / Phase 230V Motor schwarz Ribbon cable 6-poles/Flachbandkabel 6-Polig + M= M2 M= + blue/ blau 1.5m m N Filter L1 Line 230V white/Phase 230V weiss gray/grau 1.5m m Main Switch/Hauptschalter S1 black/schwarz 1.5mm2 Blade Term inal Anschlussklem m e black / schw arz 1.5m m Relay black/Relais schwarz Relay brown/Relais braun Neutral 230V gray /Nullleiter 230V grau yellow -green/gelb-grün 1.5m m C1 TRN 01A Rev B GND blue/blau +12VDC red/rot shield TH1 + - yellow -green/gelb-grün gray/grau black/schw arz brow n/braun 1.5m m red/rot 20AWG black/schw arz 1.5m m Thermocouple/Thermoelement Q1 Triac U1 Heating/Heizung USB-Plug CSE 06D Rev B USB or CSE 06D Rev A without USB Optional Page Earthing / Erde brow n / braun 1.5m m Fan/Lüf ter M1 STV02B Rev D Neutral 230V Motor black/Nullleiter 230V Motor schwarz Line 230V Motor black/Phase 230V Motor schwarz Ribbon cable 6-poles/Flachbandkabel 6-Polig Line 230V white / Phase 230V weiss Neutral 230V gray /Nullleiter 230V grau Line 230V black/Phase 230V schwarz Gate Heating red / Gate Heizung rot Thermocouple shield/Thermoelement Abschirmung Thermocouple green/Thermoelement grün Thermocouple red/Thermoelement rot Ribbon cable 4-poles/Flachbandkabel 4-Polig Ribbon cable 14-poles/Flachbandkabel 14-Polig Revision: B L1 - GND blue/blau Ribbon cable 4-poles/Flachbandkabel 4-Polig C_X2_150nF/275V +5VDC red/rot +5VDC red/rot GND blue/blau Force sensor / Kraf tsensor MT2 Cable 5-poles/Kabel 5-Polig Cable 5-poles/Kabel 5-Polig Ribbon cable 14-poles/Flachbandkabel 14-Polig MT1 PROCESS TECHNOLOGIES Repair instructions COMET QM 33 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 13 Wiring diagram black/schwarz 20AWG white/weiss 20AWG braun/brown 1.5mm2 gray/grau 20AWG QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 34 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 14 Test procedure for COMET (protection class I) Protective earth conductor test • Measure resistance between the earth/ground pin of the plug and a heating cartridge as well as between the earth/ground pin of the plug and a screw of the housing by using the protective earth conductor tester (< 0.2Ω) Insulation test • Function check of high voltage tester (Shorten tips ẻ Signal lamp illuminates and horn sounds) ã Connect tool to a short circuit receptacle • Set main switch of the tool to "1" (ON) position • Apply a high voltage of 1000 V (release current 100mA) for second between the short circuit receptacle and a screw of the housing upper part; no flashover or breakdown must occur Function test • Set main switch to "0" (OFF) position and connect tool to rated voltage • Change over to %-display: Press buttons - and + at the same time and set the main to "1" (ON) position • Press button M to start the drive • Increase speed from minimum to maximum by using buttons - and + and make sure the speed increases steadily • Check the running noise of the drive motor (bearings, commutator) and the turbine (vibrations, particles) • Turn the heating on by pressing buttons + and H at the same time • Heat the tool up to 420°C and check current consumption according to the nameplate • Check temperature on the display (415 425°C) after 10 minutes of operating time Measure temperature on the bottom surface of the hot-wedge by using a plain probe (tolerance 5C) ã Adjust temperature offset, if necessary (ẻ Setup menu) • Example: Temperature display = 420°C; temperature on temperature meter = 430°C Ỵ Offset: - 10°C Restart tool and heat it up; check temperature after another 10 minutes operating time • Tool without USB recording: Set main switch to "0" (OFF) position and let the tool cool down • Check setup menu and write parameters in tool certificate • Tool with USB recording: Ỵ Function test of USB recording Checking completeness • Check ratings of the nameplate • Check power supply cord (type of plug) • Company label LEISTER and two labels "COMET" must be bonded on the housing upper part • Check for cleanliness and possible damages QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 35 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI Function test of USB recording • • • • • • • • • • • • • Stop drive by using button M Activate tension lever and adjust force in such a way that at least 400N will be reached Release tension lever Start drive by using button M Insert USB stick The display indicates the message "wait for USB" for approx seconds Afterwards the lower display line shows on the right: *001 The tool is now ready for recording of the welding parameters Activate tension lever; the lower display line on the right changes to ->001, the parameters are recorded now Release tension lever after approx minute and stop drive by using button M Wait until the display shows the message "wait for USB" Once the lower display line on the right shows USB, the USB stick may be removed Check setup menu and write parameters in tool certificate Set main switch to "0" (OFF) position and let the tool cool down Insert USB stick to a PC and check the file Ä Actual date-no.csv (e.g 0520-001.csv) The Excel program should start automatically (example) COMPANY File-number according to date Actual date and clock time Unit according to tool type QM PROCESS TECHNOLOGIES Repair instructions COMET Page Revision: B 36 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI 15 Equipment required for LEISTER repair service Mobile Equipment • • • • • • • • • protective earth conductor tester high voltage tester up to 4000V temperature meter with temperature measurement probe multimeter with following measurement options: - Current - Voltage - Resistance - Continuity (test buzzer) rotational speed meter water column soldering iron complete set of tools (screw drivers etc.) power supply test board (distributed on training) (e.g Elabo) (e.g Elabo, Korntal) (e.g Fluke, Testo) (e.g Fluke) Installed equipment • ESD-protected working environment • Transformer, possibly separated into variable and isolating transformer Data: x 500V x 30A • built-in voltmeters (500V) • built-in ammeters (30A) or wattmeters QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B 16 Appendix screw locking Page 37 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 38 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI QM PROCESS TECHNOLOGIES Repair instructions COMET Revision: B Page 39 / 39 Created 18.09.09 PRI Released 22.09.09 PRI Modified 28.06.10 PRI ... Replace thermocouple if no continuity is detected Measure resistance between the signal lines of the thermocouple (green and red) Therefore thermocouple must be cooled down to room temperature!... personnel carrying out repair work are to be observed by each service centre Safety precautions A well-equipped working place (see "Equipment required for LEISTER repair service") is essential... Desolder red-white flex wire to the lower carbon brush holder of the motor Connect a multimeter as a diode checker between the desoldered flex wire and the upper carbon brush holder (white flex