Hobart AirForce 750 Page 24 Owner'S Manual Download | Manualshive

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OM-279 Page 20

Trouble

Remedy

Fan motor FM does not run; Power light
and Ready light both On.

Have Factory Authorized Service Agent check fan motor connections.

Check input power, and check for proper input connections (see Sections 2-7 and 2-9).

Trouble lights not working.

Have Factory Authorized Service Agent check safety control board PC1.

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Summary of Contents for AirForce 750

Page 1: ...AirForce 750 Processes Description Air Plasma Cutting and Gouging Air Plasma Cutter OM 279 180 060P August 2001 ...

Page 2: ...e made installation and operation quick and easy With Hobart you can count on years of reliable service with proper maintenance And if for some reason the unit needs repair there s a Troubleshooting section that will help you figure out what the problem is The parts list will then help you to decide which exact part you may need to fix the problem Warranty and service information for your particul...

Page 3: ...sions And Weight 9 2 3 Duty Cycle And Overheating 9 2 4 Cutting Speed 10 2 5 Selecting A Location 10 2 6 Connecting Gas Air Supply 11 2 7 Electrical Service Guide 11 2 8 Placing Jumper Links 12 2 9 Connecting Input Power 13 SECTION 3 OPERATION 14 3 1 Front Panel Controls 14 3 2 Setting Gas Air Pressure 15 3 3 Sequence Of Operation 16 SECTION 4 MAINTENANCE TROUBLESHOOTING 17 4 1 Routine Maintenance...

Page 4: ......

Page 5: ... cause fatal shocks or severe burns The torch and work circuit are electrically live whenever the output is on The input power circuit and machine internal circuits are also live when power is on Plasma arc cutting requires higher voltages than welding to start and maintain the arc 200 to 400 volts dc are common but also uses torches designed with safety interlock systems which turn off the machin...

Page 6: ...ed respirator Fumes from cutting and oxygen deple tion can alter air quality causing injury or death Be sure the breathing air is safe D Do not cut in locations near degreasing cleaning or spraying oper ations The heat and rays of the arc can react with vapors to form highly toxic and irritating gases D Do not cut on coated metals such as galvanized lead or cadmium plated steel unless the coating ...

Page 7: ...not overload building wiring be sure power supply system is properly sized rated and protected to handle this unit STATIC ESD can damage PC boards D Put on grounded wrist strap BEFORE handling boards or parts D Use proper static proof bags and boxes to store move or ship PC boards H F RADIATION can cause interference D High frequency H F can interfere with radio navigation safety services computer...

Page 8: ...10018 Cutting And Welding Processes NFPA Standard 51B from National Fire Protection Association Batterymarch Park Quincy MA 02269 1 5 EMF Information Considerations About Welding Or Cutting And The Effects Of Low Frequency Electric And Magnetic Fields Welding or cutting current as it flows through the welding or cutting cables will cause electromagnetic fields There has been and still is some conc...

Page 9: ...ons sans revers des bottes et un casque D Ne placez pas le poste sur une surface combustible ou au dessus de celle ci D Avant le coupage retirez tout combustible de vos poches par exemple un briquet au butane ou des allumettes Le fait de toucher à une pièce électrique sous tension peut donner une décharge fatale ou entraî ner des brûlures graves Le chalumeau et le circuit de masse sont automatique...

Page 10: ... le coupage au plasma d arc Intensité de courant en ampères Filtre de teinte minimum Moins de 20 no 4 20 40 no 5 40 60 no 6 60 80 no 8 Certaines applications de coupage produisent un bruit constant ce qui peut endommager l ouïe si le niveau sonore dépasse les limites permises par l OSHA repor tez vous aux Principales normes de sécurité LE BRUIT peut endommager l ouïe D Utilisez des protège tympans...

Page 11: ...EXPLOSION D HYDROGÈNE D Lors du coupage d aluminium partiellement ou totale ment immergé dans l eau de l hydrogène libre peut s accumuler sous la pièce D Consultez votre ingénieur de coupage et les instruc tions de la table de coupage LA CHUTE DE L APPAREIL peut blesser D Utiliser l anneau de levage uniquement pour soulever l appareil NON PAS les chariot les bouteilles de gaz ou tout autre accesso...

Page 12: ...nétiques basse fréquence Le courant de soudage ou de coupage passant dans les câbles de puis sance crée des causera des champs électromagnétiques Il y a eu et il y a encore un certain souci à propos de tels champs Cependant après avoir examiné plus de 500 études qui ont été faites pendant une période de recherche de 17 ans un comité spécial ruban bleu du Natio nal Research Council a conclu L accum...

Page 13: ...Cycle 18 mm At 10 IPM 280 While idling 2 2 Dimensions And Weight C Dimensions A 36 3 4 in 934 mm B 24 1 2 in 622 mm C 21 in 533 mm A Weight A Single PhaseModels 147 lb 66 kg Three Phase Models 168 lb 76 kg Ref 801 454 C B Without Torch 6 Minutes Cutting 4 Minutes Resting 2 3 Duty Cycle And Overheating Duty Cycle is percentage of 10 min utes that unit can cut at rated load without overheating If un...

Page 14: ... Location 1 Handle Use handle to roll unit short distances 2 Lifting Eye 3 Lifting Forks Use lifting eye or lifting forks to move unit If using lifting forks extend forks beyond opposite side of unit 4 Rating Label Under Access Door Use rating label to determine input power needs 5 Line Disconnect Device Locate unit near correct input pow er supply Y Special installation may be required where gaso...

Page 15: ... 4 2 7 Electrical Service Guide Single Phase Three Phase Input Voltage 200 230 460 230 460 575 Input Amperes At Rated Output 42 3 36 8 18 4 18 4 9 2 7 4 Max Recommended Standard Fuse Rating In Amperes 1 Time Delay 2 50 45 20 20 10 8 Normal Operating 3 60 60 25 25 15 10 Min Input Conductor Size In AWG Kcmil 8 10 14 14 14 14 Max Recommended Input Conductor Length In Feet Meters 110 33 97 29 153 47 7...

Page 16: ...r Link Label Move jumper links to match input voltage and label on unit Ref 801 455 S 094 120 B 230 Volts 460 Volts 575 Volts L1 L2 L3 L1 L2 L3 L1 L2 L3 3 8 in Tools Needed 230 VOLTS 460 VOLTS 200 VOLTS S 083 566 C L L L L L L 1 Do not overtighten Single Phase Models Three Phase Models ...

Page 17: ...ding Conductors 3 Line Disconnect Device Select type and size of overcurrent protection using Section 2 7 7 16 in 1 2 in Tools Needed 3 OR 2 2 L2 V L3 W L1 U L2 V Ref 801 455 Ref 144 221 Ref 070 399 C Ref 801 454 C 1 Three PhaseSystem Single Phase System Y Always connect grounding conductor first GND PE 3 2 Three Phase Connections Single Phase Connections ...

Page 18: ...ver position in most applications to length en the life of the torch and its consumables and to obtain maximum cutting performance Torch trigger must be reset after every cut while in Tip Saver mode 2 Gas Air Pressure Gauge 3 Output Control Use control to select cutting output in am peres Gas air automatically flows at the set pressure Use Gas Air Set area of control range for set ting gas air pre...

Page 19: ...trol in Gas Air Set position 1 Pressure Gauge 2 Pressure Adjustment Knob Lift knob and turn to adjust pres sure Push knob down to lock in set ting Place output control in desired cutting output Ref 190 676 Ref 801 454 C Set Controls Turn On Gas Air Supply Adjust Pressure Amperage To Begin Cutting Requires 70 150 PSI Select Desired 2 483 1034 kPa Supply 1 Set pressure to 70 PSI 483 kPa ...

Page 20: ...antly restarted during postflow by pressing trigger Check Torch Tip Electrode And Retaining Cup Check Gas Air Pressure Set Controls Begin Cutting Turn On Power Source The pilot arc starts immediately when trigger is pressed Place drag shield on edge of metal or allow correct standoff distance approximately 1 8 in 3 mm Do not clean torch by hitting it against a hard surface Hitting hard surfaces ca...

Page 21: ...re conditions Each Use Check Torch Tip Electrode And Shield Cup Check Gas Air Pressure Every Week Check Shield Cup Shutdown System 3 Months Service Air Filter Regulator Assembly Filter Replace Unreadable Labels Tape Torn Outer Covering Or Replace Cable Replace Cracked Parts Check Gas Air Hose Check Torch Body 6 Months Blow Out Or Vacuum Inside OR ...

Page 22: ...hts if power source overheats see Section 2 3 1 2 3 Difficulty establishing pilot arc may indicate consumables need to be cleaned or replaced 4 3 Checking Shield Cup Shutdown System Ref 801 300 A 1 Torch Shield Cup Turn Power On and loosen shield cup If shutdown system works properly Ready light goes off and Cup light comes on If not immedi ately turn Off power and have Fac tory Authorized Service...

Page 23: ...put Power light on Ready light on Trouble lights off fan motor FM running slowly Check position of input voltage jumper links see Section 2 8 Check input power and check for proper input connections see Sections 2 7 and 2 9 No control of output Have Factory Authorized Service Agent check safety control board PC1 and power control boards PC2 and PC3 No gas air flow Power light on Ready light on Tro...

Page 24: ... and Ready light both On Have Factory Authorized Service Agent check fan motor connections Check input power and check for proper input connections see Sections 2 7 and 2 9 Trouble lights not working Have Factory Authorized Service Agent check safety control board PC1 ...

Page 25: ...OM 279 Page 21 SECTION 5 ELECTRICAL DIAGRAMS 193 215 Figure 5 1 Circuit Diagram For 200 230 460 Volt Models ...

Page 26: ...OM 279 Page 22 194 148 Figure 5 2 Circuit Diagram For 230 460 575 Volt Models ...

Page 27: ...OM 279 Page 23 Notes ...

Page 28: ... 499 J Hardware is common and not available unless listed 1 2 3 4 5 6 7 8 9 10 15 11 12 16 8 18 19 20 21 22 23 24 25 26 27 28 29 30 25 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 17 11 12 13 14 50 51 52 Figure 6 1 Main Assembly ...

Page 29: ... main 200 230 460 1 phase model consisting of 1 21 T1 178 959 TRANSFORMER pwr main 230 460 575 3 phase model consisting of 1 TP1 166 063 THERMOSTAT NC open 135C 1 22 TE1 038 138 TERMINAL ASSEMBLY pri 3ph 3V 1 22 TE1 181 214 TERMINAL ASSEMBLY pri 1 phase 3V model 1 038 618 LINK jumper 6 23 190 998 PANEL rear 1 24 PC2 3 193 691 CIRCUIT CARD ASSEMBLY power control 2 25 176 123 FITTING plstc Qdisc elb...

Page 30: ... SOCKETS 3 PLG10 164 899 CONNECTOR SOCKETS 1 PLG5 167 640 CONNECTOR SOCKETS 1 PLG24 34 168 071 CONNECTOR SOCKETS 2 PLG26 36 176 121 CONNECTOR rect univ 084 2 PLG12 153 501 CONNECTOR SOCKETS 1 PLG21 31 158 720 CONNECTOR SOCKETS 2 PLG11 169 240 CONNECTOR SOCKETS 1 PLG2 8 170 888 CONNECTOR SOCKETS 1 PLG25 131 056 CONNECTOR SOCKETS 1 49 ICE 50C order separately 176 824 ICE 50C 25ft 1 176 826 ICE 50C 5...

Page 31: ...obart s 5 3 1 Limited Warranty shall not apply to 1 Consumable components such as contact tips cutting nozzles slip rings drive rolls gas diffusers plasma torch tips and electrodes weld cables and tongs and tips or parts that fail due to normal wear 2 Items furnished by Hobart Miller but manufactured by others such as engines or trade accessories These items are covered by the manufacturer s warra...

Page 32: ...r To locate a Distributor retail or service location Call 1 877 Hobart1 or visit our website at www HobartWelders com Contact your Distributor for Welding Supplies and Consumables Options and Accessories Personal Safety Equipment Service and Repair Replacement Parts Training Schools Videos Books Technical Manuals Servicing Information and Parts Circuit Diagrams Welding Process Handbooks Contact th...

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