Husqvarna LiHD50 Workshop Manual Download Page 20 | Manualshive

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20 – English

Diagnosis and troubleshooting

Fig.6

Fig.7

6.7 Troubleshooting the control unit
PMDC - LiHD50

Check that the blade terminals and associated

wires are not bent or damaged.

(A) 6.3x0.8mm M- (Black wire)

(B) 6.3x0.8mm M+ (Red wire)

(C) 6.3x0.8mm PCB + (Yellow wire)

(D) 6.3x0.8mm PCB 0V (Black wire)

(E) 4.8x0.8mm Shutdown (blue wire)

See figure 6.

6.8 Troubleshooting the control unit
PMDC - LiHD60X / LiHD70X

Check that the blade terminals and associated

wires are not bent or damaged.

(A and B) 2.8 mm blade terminal to hand guard,

power switch (black wires).

(C) Battery communication (red, black and blue

wires).

(D) Power supply (red wire).

Shares connector with 0V.

(E) OV supply (black wire).

Shares connector with POWER.

(F) Motor + supply (gray wire).

Shares connector with Motor (-).

(F) Motor - supply (black wire).

Shares connector with Motor (+).

See figure 7.

6.9 Overhaul

Inspect the component parts of the machine. Re-

place damaged parts as described in the relevant

chapter.

A

B

C

D

E

A

C

D E

F G

B

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Summary of Contents for LiHD50

Page 1: ...Workshop Manual English LiHD50 LiHD60X LiHD70X ...

Page 2: ......

Page 3: ...s the right to modify the design and appearance of products without prior notice Contents Index 4 Introduction and safety regulations 6 Technical data 10 Service tools LiHD60X LiHD70X 11 Service data LiHD50 12 Diagnosis and troubleshooting 16 Basic dismantle assembly 22 Safety equipment 26 Repair instructions LiHD50 34 Repair instructions LiHD60X LiHD70X 40 ...

Page 4: ...antling the keypad and control unit 37 Assembling the keypad and control unit 37 Repairing damaged threads 38 Repair instructions LiHD60X LiHD70X 40 General repair instructions 41 Dismantling the gear housing and motor out of the chassis 41 Dismantling gears cutting unit and motor out of the gear housing 41 Cutting unit 42 Gears 44 Assembling gears cutting unit and motor in the gear housing 45 Dis...

Page 5: ...English 5 Index ...

Page 6: ...ntroduction and safety regulations Contents 2 1 General 7 2 2 Safety 7 2 3 Target group 7 2 4 Changes 7 2 5 Tools 7 2 6 Structure 7 2 7 Numbering 7 2 8 General instructions 8 2 9 Special instructions 8 2 10 Limitations 8 2 11 Symbols on the machine 9 ...

Page 7: ...ual will become out of date In order to prevent this the Manual should be read together with all service information concerning the machine in question 2 5 Tools Special tools are required for some stages All service tools are listed in the Workshop Manual Usage is made evident in each section Always use original Husqvarna Spare parts Service tools Accessories 2 6 Structure This Workshop Manual ca...

Page 8: ...er unscrew the battery Replace a damaged battery Use a brush compressed air when cleaning the machine Water cleaning fluid and petroleum products may only used when cleaning the cutting unit When using compressed air do not direct the air jet toward your body Air can penetrate into the blood circulation which means mortal danger Use ear protection during testing 2 10 Limitations This Workshop Manu...

Page 9: ...ine keypad has the following symbols The symbols below are embedded on the machine 2 12 Symbols in the Workshop Manual This symbol warns of personal injury when the instructions are not followed Starting Stopping savE Battery saver mode Warning lamp Fault indicator Adjustable handle ...

Page 10: ...data Technical data LiHD50 LiHD60X LiHD70X Cutting speed for savE cuts min 2700 3200 3200 Cutting speed for normal operation cuts min 3200 4000 4000 Weight without battery Ibs kg 6 6 3 0 8 4 3 8 8 6 3 9 LiHD50 LiHD60X LiHD70X ...

Page 11: ...is and troubleshooting 576 69 23 01 1 2 Battery Diagnostic Tool The Battery Diagnostic Tool is a service tool for Husqvarna s battery powered products It is intended to be used with a computer PC which is not included The service tool transmits various data from the product and battery to the computer such as product ID There is also a troubleshooting guide in the form of a diagnostic tool and a l...

Page 12: ...12 English 5 Service data LiHD50 Service data Key The numbers by bolted components represent the tightening torque in Nm Lubricate chain saw oil Lubricate with grease 1 Nm x6 2 3 Nm 4 mm ...

Page 13: ...English 13 Service data Service data LiHD50 x2 1 Nm x8 2 3 Nm 4 mm x2 2 3 Nm 4 mm x11 2 3 Nm 4 mm ...

Page 14: ...14 English Service data Service data LiHD60X LiHD70X LiHD60x US x6 2 3 Nm 4 mm x2 x4 70X 2 3 Nm 4 mm x5 x7 60X US 2 3 Nm 4 mm x2 2 3 Nm 4 mm 8 mm ...

Page 15: ...English 15 Service data Service data LiHD60X LiHD70X x4 2 3 Nm 4 mm x10 2 3 Nm 4 mm x8 2 3 Nm 4 mm x4 2 3 Nm 4 mm x2 2 3 Nm 4 mm x5 2 3 Nm 4 mm x2 1 Nm x2 1 Nm ...

Page 16: ...ect the diagnostic tool LiHD60X LiHD70X 17 6 3 No signal to diagnostic tool 17 6 4 Troubleshooting diagram LiHD50 18 6 5 Troubleshooting the main switch 19 6 6 Troubleshooting the keypad 19 6 7 Troubleshooting the control unit PMDC LiHD50 20 6 8 Troubleshooting the control unit PMDC LiHD60X LiHD70X 20 6 9 Overhaul 20 ...

Page 17: ...nostic tool for trouble shooting the machine Connect cable B to the diagnostic tool for trouble shooting the battery NB Refer to the manual for the Diagnostic Tool Battery for detailed instructions and follow the instructions in the diagnostic tool See figure 2 2 Diagnose troubleshoot according to the diagnostic tool instructions and make any necessary repairs as instructed in the relevant chapter...

Page 18: ...ter 6 5 6 8 Diagnosis and troubleshooting Product will not start Check the battery Can the product be started green light Is the keypad showing a fault signal Let the machine cool down for at least 60 mins Change the control unit if the fault persists Check the fuse Check the cables Replace the part Check the safety switch Check the breaker Check the electric motor Replace the control unit ...

Page 19: ...en the switch is depressed The result should be closed circuit Measure between pin 2 and pin 5 when the switch is not depressed The result should be closed circuit Measure between pin 2 and pin 5 when the switch is depressed The result should be 50 kΩ 25 Measure between B1 and Pin 1 The result should always be closed circuit See figure 3 If all readings are within specified limits the switch is OK...

Page 20: ... LiHD60X LiHD70X Check that the blade terminals and associated wires are not bent or damaged A and B 2 8 mm blade terminal to hand guard power switch black wires C Battery communication red black and blue wires D Power supply red wire Shares connector with 0V E OV supply black wire Shares connector with POWER F Motor supply gray wire Shares connector with Motor F Motor supply black wire Shares con...

Page 21: ...English 21 Diagnosis and troubleshooting ...

Page 22: ...Basic dismantle assembly Basic dismantle assembly Contents 7 1 Battery 23 7 2 Wear guard LiHD50 23 7 3 Front handle LiHD50 23 7 4 Chassis LiHD50 24 7 5 Front handle LiHD60X LiHD70X 25 7 6 Chassis LiHD60X LiHD70X 25 ...

Page 23: ...embly has been completed 7 2 Wear guard LiHD50 Loosen the screws 8x and lift off the wear guard under the machine Assemble in the reverse order Tightening torque 2 3 Nm See figure 2 7 3 Front handle LiHD50 1 Dismantle the wear guard as above 2 Loosen the screws 2x holding the handle Assemble in the reverse order Tightening torque 2 3 Nm See figure 3 3 Lift the contact for the handle out of the cha...

Page 24: ... B See figure 6 Cleaning and inspection Clean and thoroughly check the chassis halves as well as the vent covers Parts must be replaced if cracked or showing signs of other defects Always use original spare parts See figure 7 Assemble in the reverse order Tightening torque 2 3 Nm Replace the damaged decal Fig 6 Fig 7 Fig 5 A B NOTE It should be easy to put together the chassis halves Make sure cab...

Page 25: ...are not damaged 7 6 Chassis LiHD60X LiHD70X Loosen the screws 8x and lift off the right chassis half See figure 10 Cleaning and inspection Clean and thoroughly inspect the chassis halves vent cover and handle cable protection Parts must be replaced if cracked or showing signs of other defects Always use original spare parts See figure 11 Assemble in the reverse order Tightening torque 2 3 Nm NOTE ...

Page 26: ...0 27 8 5 Dismantling the throttle trigger LiHD50 28 8 6 Assembling the throttle trigger LiHD50 28 8 7 Dismantling the front handle and start inhibitor LiHD60X LiHD70X 29 8 7 Assembling the front handle and start inhibitor LiHD60X LiHD70X 30 8 9 Dismantling the throttle trigger and handle stop LiHD60X LiHD70X 32 8 10 Assembling the throttle trigger LiHD60X LiHD70X 32 8 11 Replacing the blade guard ...

Page 27: ...ling the hand guard LiHD50 1 Dismantle the front handle and the right chassis half See Chapter 7 2 7 4 2 Unhook the hand guard from the chassis See figure 2 Cleaning and inspection Clean and check the hand guard The hand guard must always be replaced with a new one if cracked or showing signs of other defects Always use original spare parts See figure 3 8 4 Assembling the hand guard LiHD50 1 Make ...

Page 28: ...tly against the main switch and that the spring is in the groove D on the throttle trigger and behind the gap E See figure 6 2 Assemble the right chassis half and the front handle See Chapter 7 2 7 4 Cleaning and inspection Clean and check all parts thoroughly Parts must be replaced if cracked or showing signs of other defects Always use original spare parts Check that the spring is intact and ret...

Page 29: ...trol unit and remove them through the hole B in the chassis See figure 7 4 Loosen the screws 10x and carefully lift off the handle half See figure 8 5 Lift the relay with cables C and the loop D out of the handle See figure 9 6 Lift the start inhibitor E plastic clips F 3x springs G 3x and spring H over the screw tower out of the handle See figure 10 Fig 7 Fig 8 Fig 9 Fig 10 A B WARNING Exercise c...

Page 30: ...other defects Make sure the springs have retained their tension Always use original spare parts See figure 11 8 7 Assembling the front handle and start inhibitor LiHD60X LiHD70X 1 Place the start inhibitor F plastic clips G and springs H in the handle See figure 12 2 Place the relay with cables D and the loop E in the handle See figure 13 Fig 11 Fig 12 F F F G G H E G Fig 13 C D ...

Page 31: ... hole B in the chas sis and connect the contacts A to the control unit NB The safety catch works irrespective of the order in which the contacts A are connected See figure 16 6 Assemble the gear housing and motor in the chas sis See Chapter 10 15 7 Assemble the right chassis half and the front handle See Chapter 7 5 7 6 Fig 14 Fig 15 Fig 16 A B NOTE Ensure cables etc are positioned correctly to av...

Page 32: ... Cleaning and inspection Clean and check the throttle trigger thoroughly It must always be replaced with a new one if cracked or showing signs of other defects Always use origi nal spare parts See figure 18 8 10 Assembling the throttle trigger LiHD60X LiHD70X 1 Place the throttle trigger C into the handle fol lowed by the handle stop A and spring B See figure 17 2 Assemble the rear handle See Chap...

Page 33: ...replace a damaged blade guard with a new one Loosen the nut A holding the anchor plate B Loosen the nuts C 5x for 60X 70X 7x for 60X US Lift off the blade guard D with anchor plate B and separate them Assemble in the reverse order Tightening torque 3 4 Nm See figure 19 Fig 19 A B C D ...

Page 34: ... 1 General repair instructions 35 9 2 Replacing the shears 35 9 3 Dismantling the motor and gear package 36 9 4 Assembling the motor and gear package 36 9 5 Dismantling the keypad and control unit 37 9 6 Assembling the keypad and control unit 37 9 7 Repairing damaged threads 38 ...

Page 35: ...m See figure 2 7 Assemble the bottom plate with gasket on the gear housing and fasten with screws 6x Tighten the screws crosswise according to the numbering on the bottom plate Tightening torque 3 4 Nm NB Always replace the gasket with a new one after dismantling the gear housing See figure 4 9 Repair instructions LiHD50 9 1 General repair instructions Repair instructions LiHD50 NOTE Note how wire...

Page 36: ...ther defects Always use original spare parts See figure 7 9 4 Assembling the motor and gear package 1 Place the motor on the gear housing 2 Place the gear package and cutting unit in the gear housing and assemble the bottom plate on the gear housing See Chapter 9 2 3 Connect the contact and place the gear housing and motor in the chassis Make sure the cables from the contact to the motor are posit...

Page 37: ...ck all parts thoroughly Parts must be replaced if cracked or showing signs of other defects Always use original spare parts See figure 10 9 6 Assembling the keypad and control unit 1 Connect the keypad to the control unit 2 Place capitalise the control unit with cables main switch and keypad into the chassis Screw on the battery contact 2x screws See figure 9 3 Connect the contact to the motor See...

Page 38: ...38 English 9 7 Repairing damaged threads If the plastic threads in the chassis are damaged drill out the hole with a 4 5 mm drill bit Then replace the original screw with screw 503 21 74 16 IHSCT MT5x16 ...

Page 39: ...English 39 ...

Page 40: ...ssembling gears cutting unit and motor in the gear housing 45 10 7 Dismantling the control unit and battery contact 46 10 8 Assembling the control unit and battery contact 46 10 9 Dismantling the rear handle 47 10 10 Dismantling the keypad 49 10 11 Assembling the keypad 50 10 12 Dismantling the main switch and main cabling 51 10 13 Assembling the main switch and main cabling 51 10 14 Assembling th...

Page 41: ...ng and motor out of the chassis 1 Dismantle the front handle and the right chassis half See Chapter 7 5 7 6 2 Disconnect the motor contact from the control unit See figure 1 3 Loosen the screws 2x holding the gear housing and motor in the chassis See figure 2 4 Lift the gear housing and motor out of the chassis 10 3 Dismantling gears cutting unit and motor out of the gear housing 1 Loosen the scre...

Page 42: ...ting unit and separate the parts as shown in the exploded view drawing See figs 7 8 and 9 Cleaning and inspection Clean and check all parts thoroughly Parts must be replaced if cracked or showing signs of other defects Always use original spare parts 3 Assemble in the reverse order Tightening torque See service data Fig 6 Fig 7 Repair instructions LiHD60X LiHD70X A C B LiHD60X US ...

Page 43: ...English 43 Fig 9 Fig 8 LiHD60X LiHD70X Repair instructions LiHD60X LiHD70X ...

Page 44: ... off the cutting unit See figure 10 2 Separate the parts as shown in the exploded view drawing See figure 11 Cleaning and inspection Clean and check all parts thoroughly Parts must be replaced if cracked or showing signs of other defects Always use original spare parts 3 Assemble in the reverse order Fig 10 A C B ...

Page 45: ... unit in the gear housing Screw the cutting unit into the gear housing 2x screws Note that the front screw also locks the safety bail with associated nut Tightening torque 3 4 Nm See figure 13 3 Assemble the bottom plate with gasket on the gear housing and fasten with screws 6x Tighten the screws crosswise according to the numbering on the bottom plate Tightening torque 3 4 Nm NB Always replace th...

Page 46: ...ee figure 17 10 8 Assembling the control unit and battery contact 1 Connect contacts D and E on the battery contact to the control unit See figure 18 2 Place the control unit battery contact and cables into the chassis Connect the contact C Fasten screws A on the control unit and screws B on the battery contact Tightening torque 3 4 Nm See figure 15 3 Connect the contacts for the front handle to t...

Page 47: ...the fastener D a quarter of a revolution until it stops See figure 21 4 Lift up the plastic catch E with a screwdriver so that it goes over the heel and continue turning the fastener anticlockwise one quarter of a revolution until it stops See figure 22 5 Use a screwdriver to carefully press off the fasten er from the handle and remove it from the cables together with the O ring See figure 23 Fig ...

Page 48: ...eypad including fixings main switch and cables from the handle See figure 26 Cleaning and inspection Clean and check all handle parts Parts must be replaced if cracked or showing signs of other defects Always use original spare parts See figure 27 Fig 24 Fig 25 Fig 26 Fig 27 Repair instructions LiHD60X LiHD70X WARNING Exercise care to ensure the spring does not fly out and causes person al injury ...

Page 49: ...atch B and carefully pulling apart the contact See figure 28 2 Depress one catch C 4x at a time from below with a screwdriver and carefully remove the keypad with holder from the bracket D See figure 29 Cleaning and inspection Clean and check all parts of the keypad thoroughly They must always be replaced with new ones if cracked or showing signs of other defects Always use original spare parts Se...

Page 50: ...e keypad is mounted differs no more than 3 C from the ambient temperature See figure 32 3 Remove the protective tape from the new keypad and press it onto the holder Press on the keypad with 10 N cm for at least 10 seconds See figure 33 4 Snap on the keypad with holder in the bracket D and place the flat cable into the grooves in the bracket See figure 34 5 Plug in connector A See figure 35 Fig 31...

Page 51: ...ng and inspection Clean and inspect the main switch and cables They must always be replaced with new ones if cracked or showing signs of other defects Always use original spare parts See figure 38 Fig 36 Fig 39 Fig 37 Fig 38 10 13 Assembling the main switch and main cabling 1 Connect the contact B to the main switch See figure 39 2 Connect contact A and the yellow wire A and place the main switch ...

Page 52: ...H into the handle fol lowed by the handle stop F and spring G See figure 41 3 Put the right handle half in place and fasten with screws 5x Tightening torque 3 4 Nm See figure 42 Fig 42 Fig 41 Fig 40 WARNING Exercise care to ensure the spring does not fly out and causes person al injury Wear protective goggles NOTE The flat cable to the keypad is very fragile NOTE It should be easy to put together ...

Page 53: ...e half revolu tion clockwise until the handle stop comes into place See figure 45 7 Place the handle in the chassis and fasten with screws 4x Tightening torque 3 4 Nm See figure 46 8 Connect contact A and place the cables with clips B in the chassis See figure 47 Fig 47 Fig 46 Fig 45 Fig 44 Fig 43 NOTE The fastener can only be pressed onto the handle when the groove in the fastener and the heel on...

Page 54: ...vent holes in the chassis and that the cables follow the channel B in the chassis above the control unit See figure 48 2 Fasten the gear housing and motor in the chassis with screws 2x Tightening torque 3 4 Nm See figure 49 3 Connect contact from the motor to the control unit See figure 50 4 Assemble the right chassis half and the front handle See Chapter 7 5 7 6 Fig 48 Fig 49 Fig 50 NOTE The cabl...

Page 55: ...cture 3 in appendix Motor connector not correctly as sembled 3 Make sure the motor connector s are correctly assembled See picture 6 in appendix Internal damage to trigger switch 4 Replace trigger switch Short circuit in control unit 5 Replace control unit Electric motor jerks shortly when applying the trigger then stops Short circuit in control unit Replace control unit Product shuts off when app...

Page 56: ...re 1 in appendix 2 Make sure the small cables bet ween power connector and control unit are not loose or damaged See picture 6 in appendix Product works but there are no indi cation light on the keypad Bad connection in keypad connector 1 Test the keypad function in Bat tery Diagnostic Tool Make sure the keypad connector is properly assembled dry not damaged and free from corrosion See picture 2 i...

Page 57: ... the fan and the green LED co mes on for 3sec If not replace charger Flashing red warning triangle on char ger when battery is inserted Bad connection between char ger and battery 1 Make sure power connectors between charger and battery are not damaged and free from dirt See picture 1 in ap pendix Over temperature on battery 2 Leave battery in the charger to cool off 1 5minutes Too low ambient tem...

Page 58: ...uct battery and charger Only colors may vary 2 Keypad connector Make sure the two connector parts are fully at tached Look for broken or loose cables 3 Trigger switch signal connector Make sure the white female connector is fully attached to the trigger switch Look for broken or loose cables Also look for signs of water corrosion or shortcirquit on connector and pins when disas sembled 13 Troubles...

Page 59: ...connector Make sure the motor connector is assembled with a tight fit to the control unit 5 Communication cables Make sure the three small communication cables are not loose or damaged Troubleshooting Appendix Pic 5 Pic 4 ...

Page 60: ...2012W33 115 73 09 26 ...

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