Husqvarna Automower 320 Technical Manual
  1. Manuals
  2. Brands
  3. Husqvarna Manuals
  4. Lawn Mower
  5. Automower 320
  6. Technical manual

Husqvarna Automower 320 Technical Manual

Hide thumbs Also See for Automower 320:
Table of Contents

Advertisement

Quick Links

TEC H N ICAL MANUAL
H U SQVARNA AUTOMOWE R
®
320/330X

Advertisement

Table of Contents
loading

Related Manuals for Husqvarna Automower 320

Summary of Contents for Husqvarna Automower 320

  • Page 1 TEC H N ICAL MANUAL H U SQVARNA AUTOMOWE R ® 320/330X...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1 Function 6.4 Troubleshooting the loop signal 1.1 Husqvarna Automower 320 and 330X, what is what? 6.5 Finding a break in the boundary loop ® 1.2 Introduction 6.6 Battery test 1.3 Technical Data 7 Maintenance and service 1.4 Software...
  • Page 4 Only use original spare parts. More support for dealers can be found at: support.husqvarna.co.uk Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design, appearance and function of products without prior notice. English - 2...

  • Page 5: Function

    1. FUNCTION 1 Function 1.1 Husqvarna Automower 320 and 330X, what is what? ® The numbers in the illustration represent: Body 15. Chassis box with electronics, battery and motors Hatch to display and keypad 16. Handle Stop button/Catch to open the hatch 17.

  • Page 6: Introduction

    1. FUNCTION 1.2 Introduction This Technical Manual contains important information about the Husqvarna Automower 320 and 330X robotic ® lawnmowers and their function, how to install them and a number of installation examples. It also contains information about special menu functions available for the mower, the Autocheck Experience service program, repair instructions and troubleshooting.
  • Page 7 1. FUNCTION 1.3 Technical Data Data Automower Automower 330X ® ® Dimensions Length 72 cm 72 cm Width 56 cm 56 cm Height 31 cm 31 cm Weight 11.8 kg 13.2 kg Electrical system Battery Special Lithium-Ion battery, Special Lithium-Ion battery, 18 V/3.2 Ah 18 V/6.4 Ah Transformer...

  • Page 8: Software

    Quick Check and return to the main menu. It is important that the robotic lawnmower is programmed with the latest software versions. The Husqvarna Group is continuously improving the mower’s behaviour and performance, which results in new software versions.

  • Page 9: Mowing Technique

    There are many different types of blades and they are sold in various package sizes. Use only approved original blades from the Husqvarna Group. From the start of 2011 these are marked with a Husqvarna symbol. English - 7...
  • Page 10 1. FUNCTION 1.5.3 Irregular mowing pattern The robotic lawnmower mows the lawn in an irregular pattern. This gives a very even mowing result. In addition, there are no distinctive tracks left in the lawn, which is often the case when using a conventional lawn mower. Spiral cutting Sometimes the robotic lawnmower can change the mowing pattern and start to mow in a spiral pattern...

  • Page 11: The Loop System's Control Signals

    1. FUNCTION 1.6 The loop system’s control signals The loop system consists of a boundary wire and guide wires connected to the charging station. Together they essentially comprise four different signals: • A signal • F signal • N signal •...

  • Page 12: The Loop System's Status

    1. FUNCTION The Automower cannot enter the charging ® station when there is no N signal. The mower will eventually stop and display the Low battery voltage fault message. • Guide signal The signal that the charging station transmits through the guide wires. The guide signals lead the mower to the charging station, but can also be used to direct the mower to a remote area.
  • Page 13 1. FUNCTION Signal quality should always be 100% for satisfactory function The signal from the boundary loop is designated the A signal. See the illustration below for examples of high and low signal strengths. The strength of the A signal also varies along the boundary loop depending on the proximity to other parts 15 m of the loop.

  • Page 14: Guide Loop

    1. FUNCTION 1.9 Guide loop The guide wire, together with the part of the boundary loop that comprises the return to the charging station, is called the guide loop. The current in the guide loop always goes from the guide wire to the left in the connection between guide wire and boundary loop.
  • Page 15 1. FUNCTION The Automower always starts a search for the charging ® station using the Irregular method, on the condition that the delay times for the boundary wire or any of the guide wires are not set to 0 minutes. Irregular searching means that the Automower runs ®...

  • Page 16: Automatic Detection Of Passages

    1. FUNCTION 1.11 Automatic detection of passages When the robotic lawnmower follows a guide wire it does so at a maximum distance defined by the corridor width setting (Installation - Advanced - Corridor width). The distance is randomly varied from one search to another to reduce the risk of tracks forming.

  • Page 17: Sensors

    1. FUNCTION 1.14 Sensors There are several types of sensors in the robotic lawnmower. The front collision sensor (1), rear collision sensor (2), tilt sensor (3) and lift sensors (4) have the task of protecting both mower and user. The rear (5) and front (6) loop sensors are used to control the mower within the working area, to position the mower when docking, tracking the guide wire, etc.

  • Page 18: Special Menu Functions

    2. SPECIAL MENU FUNCTIONS 2 Special menu functions 2.1 Quick Info Quick Info is a display mode where you can quickly see information about program versions, battery, loop signals, sensors and operating history. When the start page or the main menu is displayed: Press and hold down the 0 key for two seconds to access the “Quick Info”...
  • Page 19 2. SPECIAL MENU FUNCTIONS • Software type: The model the main program is intended for e.g. 320. • MSW date: Date of issue of MSW, in the YYYY-MM-DD format. • MMI date: Date of issue of MMI, in the YYYY- MM-DD format.
  • Page 20 2. SPECIAL MENU FUNCTIONS The Info - Loop - A signal display mode shows the A signal G, F, N Quality loop signal from the boundary loop measured through the loop sensors in the mower. The value should lie between approximately 40 and 320 to ensure good A-signal, front L functionality.
  • Page 21 2. SPECIAL MENU FUNCTIONS • Tilted, X and Tilted, Y: When the robotic lawnmower is standing horizontally the value should be max ±3. Inclination up and to the left give negative values. • Normal position: YES indicates that the mower is standing in a normal position and NO indicates that the mower is upside down.

  • Page 22: Ascertain The Pin Code

    2. SPECIAL MENU FUNCTIONS The History - Search times display mode shows: • Search times: Lists the number of minutes it took the mower to find the charging station from the time the search began until the mower arrived at the charging station. The times from the past 12 searches are displayed.

  • Page 23: Main Menu Overview

    2. SPECIAL MENU FUNCTIONS 2.4 Main menu overview English - 21...

  • Page 24: Tools Menu Overview

    2. SPECIAL MENU FUNCTIONS 2.5 Tools menu overview English - 22...

  • Page 25: Tools Menu, Functions

    2. SPECIAL MENU FUNCTIONS 2.6 Tools menu, functions Via the Tools menu you can access data about the mower’s function, test functions and special settings. • Info Information about current status of software, sensors, battery, loop signal etc. • History, total Key data, which gives an overview of a mower’s age and function.
  • Page 26 2. SPECIAL MENU FUNCTIONS • Current: Nominal power consumption, measured in mA. The Info - GPS navigation menu shows: • Satellites: The number of satellites the GPS receiver is currently in contact with. • Position: The mower’s position measured in longitude and latitude. 2.6.2 History, total You can use the values shown in this sub-menu Key data...
  • Page 27 2. SPECIAL MENU FUNCTIONS • Complete chargings Counts number of complete chargings. A complete charging is defined as a charging that has proceeded for more than 20 minutes and that has been terminated as the charge current is less than 0.3 A. Search times Information about how long a search for the charging station has taken.
  • Page 28 2. SPECIAL MENU FUNCTIONS 2.6.3 History, trip History, trip means the same information as in History - Key data Info Key data above. The difference is that in History, trip it is possible to reset all values, just as a trip meter in a car. Search times History, total Mow times...
  • Page 29 2. SPECIAL MENU FUNCTIONS Note! If you have to help the wheel to go round by hand in order to get the wheel motor started and if the wheel motor stops as soon as the wheel is blocked, the fault lies in the main circuit board and not in the wheel motor.

  • Page 30: Installation

    2. SPECIAL MENU FUNCTIONS Press BACK to exit the test. Charging station This function is used to quickly check that there is a signal for A, F, N and the Guide wires. The test also shows whether the mower is receiving a charge from the charging station.
  • Page 31 2. SPECIAL MENU FUNCTIONS Calibrate tilt sensor To calibrate, i.e. reset the tilt sensor: Place the robotic lawnmower on a horizontal surface. Place the cursor on Calibrate tilt sensor and press OK. Calibrate Guides Guide wires are calibrated automatically during the starting sequence and after factory rest of the mower.
  • Page 32 3. INSTALLATION 3 Installation 3.1 Charging station The placement of the charging station should be well planned in order to give the best installation and operation of the robotic lawnmower. See 3.2 Installation of the charging station in the Operator’s Manual.

  • Page 33: Boundary Loop

    3. INSTALLATION • Do not, under any circumstances, mount the transformer at a height where there is a risk it can be submerged in water (at least 30 cm from the ground). It is not permitted to place the transformer on the ground. •...
  • Page 34 3. INSTALLATION When burying, make a channel using a spade or an edge cutter, approximately 1-20 cm deep, around the entire garden. Place the wire in the channel and then press it closed with your feet. You can also cut a channel using for instance an edge cutting machine.

  • Page 35: Guide Wire

    3. INSTALLATION Now press down the button on top of the coupler fully. Use a pair of pliers as the button on the coupler is difficult to press down by hand. IMPORTANT INFORMATION Twisted cables, or screw terminal (chock- blocks), insulated with insulation tape are not satisfactory splices.

  • Page 36: Testing The Installation

    3. INSTALLATION • The robotic lawnmower follows the guide wire on the same side of the wire to and from the Maximum charging station. This means that the guide distance wire is to the right of the mower when the mower travels to the charging station while Min 30 cm it is to the left of the mower when the mower...

  • Page 37: Calibrate Guide

    3. INSTALLATION 3.4.2 Test lawn coverage The Test lawn coverage function is used to test if the mower can follow the guide wires or the boundary loop at the selected corridor width out from the charging station. Test lawn coverage can also be used to calculate the distance from the charging station to a remote area.

  • Page 38: One Robotic Lawnmower For Several Working Areas

    3. INSTALLATION • The first time a new robotic lawnmower leaves the charging station, for instance in the start-up sequence. • In the Settings - Guide calibration function. • The first time after switching Corridor width for any guide wire. •...

  • Page 39: Safe Operation On Slopes

    3. INSTALLATION When the mower leaves the charging station it searches for the area that has been least mown. This means that the settings made in Lawn coverage are then not used by the mower. The automatic settings made by the robotic lawnmower cannot be read in the display.

  • Page 40: New Loop Signal

    It does not affect the loop signal in any way, which the PIN code in Husqvarna G2 models does. In rare cases, there may be a reason to change the...

  • Page 41: Installation Examples

    3. INSTALLATION 3.10 Installation examples The following pages contain a number of examples of installations. The aim of these examples is to demonstrate how you quickly can get started with Automower and get a good installation. The examples provide suggestions ®...
  • Page 42 3. INSTALLATION The following position of the charging station can lead to a substantially shorter guide loop. However the charging station is not placed near the centre of the garden as shown in the illustration below. 3.10.3 Example 3 In example 3, the charging station is positioned so that the F field is inside the working area behind the charging station with factory settings for charging station range.
  • Page 43 3. INSTALLATION 3.10.4 Example 4 Example 4 shows how different corridor width settings have an impact on the mower’s search path along the boundary wire. When the mower follows the boundary wire at a low corridor width, for instance 2, it has to travel a long way to the charging station leading to long search times.

  • Page 44: Autocheck Experience, Service Program

    The robotic lawnmower is connected to the computer using a service cable. There are 2 different cables: • USB cable with service connector of a standard USB type for Husqvarna G3 models (e.g. Automower 320 and 330X). ® •...

  • Page 45: Connection To The Robotic Lawnmower

    4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM When the installation has finished an Autocheck EXP menu will be created in the Start menu on your computer. A shortcut is also automatically created on the computer’s desktop. 4.1.2 Log in to Autocheck EXP Start the program by double clicking on the program icon on the desktop.
  • Page 46 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM If the text Connected mower: None is displayed in the lower bar in Autocheck EXP, contact with the mower has not been established. If this is the case, check the following: • Check that cable is correctly connected both in the computer and in the mower.

  • Page 47: Use

    4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM 4.3 Use Autocheck EXP has been designed to be as self-instructional as possible. There are a lot of help texts and illustrations in the program to guide the user. The program’s main functions are grouped in a number of menus that are accessed via buttons in a list in the upper part of the program.
  • Page 48 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM 4.3.1 Auto test In Auto test, a comprehensive test of the components in the robotic lawnmower is carried out. The test is semi- automatic, which means each component is started and stopped by the service program. Auto test is a suitable function to use for an overall review of the components, for example, in connection with winter service or to start troubleshooting.
  • Page 49 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM 4.3.2 Manual test Every component in the robotic lawnmower can be tested in the manual test. The function consists of four parts: • Power/Motors • User interface • Sensors • Loop When using Manual test unlike Auto test, you have to start and stop the components you wish to test.
  • Page 50 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM is used. Autocheck EXP itself checks which software is suitable for the connected mower. At times, there may be a need to answer questions to supplement the inspection. Read the questions carefully so that they are answered correctly.
  • Page 51 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM There are three options when programming a new main circuit board: • Select mower from the log book This is the normal and safest choice. Select the relevant robotic lawnmower from the log book and the serial number and operating data will be transferred automatically to the new main circuit board.
  • Page 52 4. AUTOCHECK EXPERIENCE, SERVICE PROGRAM Note! Autocheck EXP saves the mower automatically to the log book as soon as the mower is connected to the program. No manual saving is needed and is consequently never carried out. In those cases where something is altered while the mower is connected to Autocheck EXP, an additional save to the log book is carried out when the mower is disconnected or when Autocheck EXP is turned off.
  • Page 53 There is a complete collection of documents for robotic lawnmowers from the Husqvarna Group, with models from 2003 and later. Current service plans for many mower models are also here. Documents marked in red are newly added and unopened documents. On the right in the document tabs is a preview of the first page of selected documents.

  • Page 54: Repair Instructions

    5. REPAIR INSTRUCTIONS 5 Repair instructions All repairs to robotic lawnmowers should be done indoors on a clean work bench to protect sensitive components from moisture and dirt. All screws in the robotic lawnmower must be fitted using the correct tightening torque according to the values in Table 3: Screw fasteners on page 79.

  • Page 55: Design And Function

    5. REPAIR INSTRUCTIONS 5.1 Design and function 5.1.1 Chassis and body The robotic lawnmower is structured mechanically around the following major components: • Body • Display cover • Chassis, upper section • Chassis, lower section There are two sealing strips between the upper and lower sections of the chassis, plus a sealing strip between the upper section of the chassis and the display cover.
  • Page 56 5. REPAIR INSTRUCTIONS subsequently become the conditions for the main circuit board to take into account in evaluating the sensor signals. The MMI circuit board also has the task of presenting information from the main circuit board to the display. The main circuit board and the MMI circuit board contain their own separate software.
  • Page 57 Use only an original battery from the Husqvarna Group. The battery must not be mixed up with similar batteries used for instance with other GARDENA lawn care products.

  • Page 58: Disassembling And Assembling The Robotic Lawnmower

    5. REPAIR INSTRUCTIONS 5.1.7 Blade motor The blade motor is a very efficient brushless motor. The nominal speed is 2,300 rpm to achieve the optimal mowing result. The motor cannot be repaired and has to be replaced if it is faulty. 5.1.8 Wheel motors The two wheel motors are of the brushless DC motor type.
  • Page 59 5. REPAIR INSTRUCTIONS 5.2.1 Disassembling the body The body is fitted to the chassis using four quick- mounted, snap-on brackets. The charging cable fastened to the body’s charging strip must be disconnected to be able to remove the body entirely from the chassis.
  • Page 60 5. REPAIR INSTRUCTIONS Carefully lift the back edge of the upper section of the chassis. Disconnect the MMI cable from the main circuit board and remove the upper section of the chassis. 5.2.3 Disassembling the display cover The display cover is mounted on the chassis with four screws.
  • Page 61 IMPORTANT INFORMATION A 5 mm sealing strip must be used on Automower 320/330X. Sealing may be deficient if the wrong sealing strip is used, leading to costly repair work. The sealing strip can be laid both clockwise and counter-clockwise.
  • Page 62 5. REPAIR INSTRUCTIONS Alternative 1 - Clockwise Start by laying one end of the sealing strip in line with the marking on the chassis. Continue laying the sealing strip clockwise around the chassis half. Lay the other end of the sealing strip above the first end and then out of the channel.
  • Page 63 5. REPAIR INSTRUCTIONS Fit the MMI cable from the chassis’ upper section to the main circuit board. Fit the chassis’ upper section to the lower section. Check that the MMI cable or other cables are not pinched between the chassis halves.

  • Page 64: Disassembling The Charging Station

    5. REPAIR INSTRUCTIONS 5.3 Disassembling the charging station Replacing the antenna plate in the charging station also requires that the charging tower is detached from the charging station (see points 6 and 7 below). To replace e.g. a circuit board or a contact strip, it is sufficient to remove the cover from the charging station.

  • Page 65: Replacing The Charging Strips

    Disconnect the battery connection from the main circuit board. Open the battery cover and remove the battery. Fit a new original battery from Husqvarna Group and connect it to the main circuit board. Assemble the mower in the reverse order for disassembly.
  • Page 66 5. REPAIR INSTRUCTIONS the main circuit board. The operating data is then saved automatically. Disassemble the body. See 5.2.1 Disassembling the body on page 57. Disassemble the chassis. See 5.2.2 Disassembling the chassis on page 57. Disconnect all cables from the main circuit board.

  • Page 67: Replacing The Mmi Circuit Board

    5. REPAIR INSTRUCTIONS When the main switch is set to position 1 after replacing a main circuit board, a new start-up sequence commences, which includes entering a new PIN code. 5.8 Replacing the MMI circuit board Disassemble the body. See 5.2.1 Disassembling the body on page 57.

  • Page 68: Replacing The Gps Circuit Board

    5. REPAIR INSTRUCTIONS 5.9 Replacing the GPS circuit board Disassemble the body. See 5.2.1 Disassembling the body on page 57. Disassemble the chassis. See 5.2.2 Disassembling the chassis on page 57. Unscrew the four screws (Torx 20) securing the GPS circuit board to the chassis. Disconnect the connection from the connector on the GPS circuit board.
  • Page 69 5. REPAIR INSTRUCTIONS IMPORTANT INFORMATION Only touch the edges of the circuit board. Never touch the board’s components and pin terminals. Pull off the keypad and thread the cable out through the hole. Remove the protective film from the new keypad and then press new keypad onto the display cover.

  • Page 70: Replacing The Buzzer

    5. REPAIR INSTRUCTIONS 5.11 Replacing the buzzer Disassemble the body. See 5.2.1 Disassembling the body on page 57. Disassemble the chassis. See 5.2.2 Disassembling the chassis on page 57. Loosen the two screws (Torx 20) holding the buzzer in position. Disconnect the buzzer connectors from the MMI circuit board and remove the buzzer from the chassis.
  • Page 71 5. REPAIR INSTRUCTIONS 5.13 Cleaning or replacing the ventilation filter Dismantle the body. Refer to 5.2.1 Dismantling the body on page 57 Dismantle the front display cover by pulling up the cover firmly. Dismantle the front display cover bracket by unscrewing the three screws with the display cover closed.

  • Page 72: Replacing The Sensors

    5. REPAIR INSTRUCTIONS 5.14 Replacing the sensors 5.14.1 Front loop sensors The front loop sensors are mounted on the front sensor circuit board. The sensors cannot be replaced separately. The entire front sensor circuit board must be replaced as a unit. Disassemble the body.
  • Page 73 5. REPAIR INSTRUCTIONS Disconnect the cable from the lift sensor circuit board. Note: Always pull the connector and NOT the cable. Remove the lift sensor circuit board by carefully bending up the snap-on fasteners and lifting out the sensor circuit board. Unscrew the two screws (Torx 20) which secure the holders for the front sensor circuit boards.

  • Page 74: Replacing The Blade Motor

    5. REPAIR INSTRUCTIONS circuit board. Note: Always pull the connector and NOT the cable. Remove the collision sensor circuit board by carefully bending up the snap-on fasteners and lifting out the sensor circuit board. Fit the new sensor circuit board and reconnect the cable.

  • Page 75: Replacing The Wheel Motor

    5. REPAIR INSTRUCTIONS 5.16 Replacing the wheel motor Disassemble the body. See 5.2.1 Disassembling the body on page 57. Disassemble the chassis. See 5.2.2 Disassembling the chassis on page 57. Disconnect the cable for the wheel motor from the main circuit board and disconnect the cable from the cable brackets in the lower chassis section.

  • Page 76: Replacing The Rear Collision Columns

    5. REPAIR INSTRUCTIONS Unscrew the four screws (Torx 20) securing the cover to the cutting height adjustment. Disassemble the cover with the motor from the chassis. Remove the cogwheel from the motor. Loosen the three screws (Torx 25) securing the motor in the cover.

  • Page 77: Replacing The Front Collision Columns

    5. REPAIR INSTRUCTIONS 5.19 Replacing the front collision columns Disassemble the body. See 5.2.1 Disassembling the body on page 57. Disassemble the chassis. See 5.2.2 Disassembling the chassis on page 57. Unscrew the four screws (Torx 20) securing the front collision brackets to the chassis. Loosen the three screws securing the bracket to the collision column.
  • Page 78 5. REPAIR INSTRUCTIONS To replace the sleeve for the lift sensor, the lift sensor circuit board must also be removed by bending the snap-on fastener. The cable tie must also be removed. Note! Use a new cable tie when fitting the new sleeve. Refit all components, the chassis and body.

  • Page 79: Replacing The Main Circuit Board, Charging Station

    5. REPAIR INSTRUCTIONS 5.21 Replacing the main circuit board, charging station Remove the cover from the charging station. See 5.3 Disassembling the charging station on page 62. Loosen all contacts from the circuit board. Snap off the circuit board from the charging tower by carefully turning back the locking edges.
  • Page 80 5. REPAIR INSTRUCTIONS 5.23 Fitting Screws It is extremely important how screws are mounted in plastic. If the screws are mounted incorrectly, there is a risk of damaging the threads in the plastic and thereby shortening the service life of the plastic part. If threads have been destroyed, the part must be replaced.

  • Page 81: Screw Fasteners

    5. REPAIR INSTRUCTIONS 5.24 Screw fasteners All screws are made from stainless material or rustproofed with zinc plating. Article numbers are to be found in the separate Spare Parts List. Table 3: Screw fasteners Fastener Hardware Tool Tightening torque (Nm) Circuit board holder Screw, grey 4 x 14 mm Torx 20...

  • Page 82: Troubleshooting

    6. TROUBLESHOOTING 6 Troubleshooting The troubleshooting section consists of two main areas: Messages Symptoms Each message and symptom is explained using one or more possible causes of the problem, followed by one or more solutions. First go through the basic and installation-related possible causes described in the following sections in this chapter. Before further troubleshooting and component replacement is carried out, also perform the following actions: Update the main program and the MMI program to the latest version.

  • Page 83: Messages

    Two batteries are connected 320 can only be used together with one on a 320. battery. 58/59 Temporary battery Wrong type of battery. Use only original batteries from the problem Husqvarna Group. (58 indicates battery A, 59 battery B) English - 81...
  • Page 84 Battery on page 58. (60 indicates battery A, 61 battery B) Wrong type of battery. Use only original batteries from the Husqvarna Group. 62/63 Temporary battery Battery temp sensor gives low Change battery. See 5.8 Replacing the problem or high temperature reading.
  • Page 85 6. TROUBLESHOOTING Installation No loop signal Boundary wire broken. Check the signal given by the LED on the charging station. See 6.4 Troubleshooting the loop signal on page 90. The transformer is not Check the wall socket connection and connected. whether an earth-fault breaker has tripped.
  • Page 86 6. TROUBLESHOOTING Mower lifted The lift sensor has been Free the robotic lawnmower and rectify the activated due to the mower reason it got stuck. getting stuck. One of the lift senor magnets Check the magnets. See 5.1.4 Magnets for is inverted or missing.
  • Page 87 6. TROUBLESHOOTING Tilt sensor problem The tilt sensor has Calibrate the tilt sensor. See 2.6.5 Special incongruous values settings on page 28. Replace the main circuit board. See 5.7 Replacing the main circuit board on page 63. Settings restored User settings failed to save If the fault occurs repeatedly, program the and the mower has been mower with the most recent main program.

  • Page 88: Symptoms

    Thus, one cannot, for instance use an MMI circuit board in a Husqvarna 320 if it has previously been fitted to a Husqvarna 330X. Charging station...
  • Page 89 6. TROUBLESHOOTING 6.2.1 Symptoms during mowing Table 5: Symptoms during mowing Symptom Cause Action Uneven mowing results The robotic lawnmower works Increase the working hours. too few hours per day. Working area too large. Try to limit the working area or extend the working time.
  • Page 90 6. TROUBLESHOOTING The robotic lawnmower Faulty microswitch. Check and replace if necessary the STOP does not react when button’s microswitch. pressing the STOP button The robotic lawnmower See above. See above. does not react when the hatch is closed. 6.2.2 Symptoms during searching Table 6: Symptoms during searching Symptom Cause...
  • Page 91 6. TROUBLESHOOTING The robotic The mower cannot detect the Check the LED on the charging station. lawnmower drives F field and therefore does not turn See 6.4 Troubleshooting the loop signal on straight into the in front of the charging station. page 90.

  • Page 92: Loop Signal

    6. TROUBLESHOOTING 6.3 Loop signal When measuring loop signal strength the mower should be placed in the charging station. Use the Tools - Test - Charging station menu function to check that the signal strength is within the expected values. The test provides a quick answer to if the charging station generates all signals and the mower can detect these signals.
  • Page 93 6. TROUBLESHOOTING 6.4.3 Blue flashing light Most likely a break in the boundary loop. Measure the resistance in the boundary wire using a multimeter. Disconnect all cables from the charging station during measuring. The resistance value for a non-faulty boundary wire should be between 0-20 Ohm.
  • Page 94 A wire break can be found by using Husqvarna’s break detection tool or with the manual method that is described below. A description of how the break detection tool is used is available in a separate service bulletin.
  • Page 95 When the break is found, the damaged section must be replaced with a new wire. The damaged section can be cut out if it is possible to shorten the boundary wire. Use only original couplers from the Husqvarna Group. English - 93...
  • Page 96 6. TROUBLESHOOTING 6.6 Battery test If the mower’s battery starts to perform poorly, the robotic lawnmower will mow for shorter time periods. The mower can also stop and show the Low battery voltage message. To establish whether the battery is functioning unsatisfactorily a battery test is recommended.
  • Page 97 6. TROUBLESHOOTING Note! If the mower has not been in operation for more than two months when the test is performed, for example if the mower has been put in for a winter service, at least two and preferably three battery tests should be carried out.
  • Page 98 7. MAINTENANCE AND SERVICE 7 Maintenance and service 7.1 Cleaning Clean the body, display cover and chassis regularly. The best way to clean the body is with a damp sponge or cloth. The underside of the body, wheels and blade disc are best cleaned with a brush (for example, a washing-up brush).
  • Page 99 Otherwise, the charging station must be stored indoors. If the charging station is stored indoors it is important to remember to protect the ends of the boundary wire from moisture by placing them, for example, in a coupler from Husqvarna Group. English - 97...
  • Page 100 7. MAINTENANCE AND SERVICE 7.3 Service schedule The table below contains a checklist of points and actions to be taken when servicing the mower. Some of the points must be carried out every three years while others must be done every year. Updated and complete service plans can be found in Autocheck under Documentation, refer to ”4.3.8 Documentation”.
  • Page 101 7. MAINTENANCE AND SERVICE Fully charge the battery. Always charge the battery fully before winter storage. If this is not done, the battery may be rendered useless due to voltage levels dropping too low. Charging the battery fully before winter storage means it does not require maintenance charging during the winter.
  • Page 102 AUTOMOWER is a trademark owned by Husqvarna AB. Copyright © 2014 HUSQVARNA. All rights reserved. 115 67 74-26...

This manual is also suitable for:

Automower 330x

Table of Contents