Service Manual MK5™NX™Electronics NX NX-B NX-LP NX-50 NX-75 NX w/ACC DEALER: Keep this manual. The procedures in this manual MUST be performed by a qualified technician. For more information regarding Invacare products, parts, and services, please visit www.invacare.
USEFUL TERMS WARNING A QUALIFIED TECHNICIAN MUST PERFORM THE INITIAL SET UP OF THIS WHEELCHAIR. ALSO, A QUALIFIED TECHNICIAN MUST PERFORM ALL PROCEDURES IN THE SERVICE MANUAL. WHEELCHAIR USERS: DO NOT SERVICE OR OPERATE THIS EQUIPMENT WITHOUT FIRST READING AND UNDERSTANDING (1) THE OWNER’S OPERATOR AND MAINTENANCE MANUAL AND (2) THE SEATING SYSTEM MANUAL (IF APPLICABLE).
TABLE OF CONTENTS TABLE OF CONTENTS USEFUL TERMS ................................................................................. 2 SPECIAL NOTES ................................................................................ 5 SECTION 1—GENERAL GUIDELINES ................................................... 6 Controller Settings/Repair or Service ...................................................................................................6 Operation Information .....................................
TABLE OF CONTENTS TABLE OF CONTENTS SECTION 6—REMOTE PROGRAMMER .............................................. 26 Overview ....................................................................................................................................................26 Remote Programmer Terminology ......................................................................................................27 Function..............................................................................................
SPECIAL NOTES SPECIAL NOTES Signal words are used in this manual and apply to hazards or unsafe practices which could result in personal injury or property damage. Refer to the table below for definitions of the signal words. SIGNAL WORD MEANING DANGER Danger indicates an imminently hazardous situation which, if not avoided will result in death or serious injury. WARNING Warning indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
SECTION 1—GENERAL GUIDELINES SECTION 1—GENERAL GUIDELINES WARNING SECTION 1 - GENERAL GUIDELINES contains important information for the safe operation and use of this product. DO NOT use this product or any available optional equipment without first completely reading and understanding these instructions and any additional instructional material such as Owner’s Manuals, Service Manuals or Instruction Sheets supplied with this product or optional equipment.
SECTION 2—EMI INFORMATION SECTION 2—EMI INFORMATION WARNING CAUTION: IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION REGARDING THE POSSIBLE EFFECTS OF ELECTROMAGNETIC INTERFERENCE ON YOUR POWERED WHEELCHAIR.
SECTION 2—EMI INFORMATION WARNING Powered Wheelchair Electromagnetic Interference (EMI) Because EM energy rapidly becomes more intense as one moves closer to the transmitting antenna (source), the EM fields from hand-held radio wave sources (transceivers) are of special concern. It is possible to unintentionally bring high levels of EM energy very close to the powered wheelchair's control system while using these devices. This can affect powered wheelchair movement and braking.
SECTION 3—TROUBLESHOOTING SECTION 3—TROUBLESHOOTING All Power Wheelchairs SYMPTOM Error Code E03 or E04, 3 or 4 flashes of joystick LEDs. PROBABLE CAUSE SOLUTIONS Motor lock levers disengaged. Engage motor lock levers. Refer to the wheelchair Owner’s Manual for more information. Bad motor connection. Check all motor connections. Ohm out motors. Check brushes and replace if necessary. Replace motors if high reading is present. Normal reading is 0.2-5 Ohms (4 Pole motors) or 0.5-5 Ohms (2 Pole motors).
SECTION 3—TROUBLESHOOTING Wheelchairs With Elevate Systems SYMPTOM Seating system not functioning or working intermittently. PROBABLE CAUSE SOLUTIONS Low batteries. Charge batteries. Refer to the seating system Owner’s Manual. Faulty electrical connection. Check all connections. Blown fuse. Replace wiring harness. Refer to the seating system Owner’s Manual. Seat has been driven under a heavy load for an extended period of time. Allow time for the electronics to cool down (Light Duty Use).
SECTION 4—JOYSTICK DESCRIPTIONS SECTION 4—JOYSTICK DESCRIPTIONS SPJ™and CSPJ™Joystick Switches and Indicators NOTE: For the following information, refer to FIGURE 4.1. SPJ Joystick Joystick Charger/ Programming Input Speed Control Knob On/Off Toggle Switch To Controller CSPJ Joystick Information Gauge On/Off Button Joystick Horn Multi-Function Charger Port Speed Control Knob To Controller FIGURE 4.
SECTION 4—JOYSTICK DESCRIPTIONS Speed Control Knob The speed control knob is located on the back of the joystick housing. This rotary switch is used for controlling the speed and acceleration of the wheelchair. 1. Turn the switch clockwise to increase the speed of the wheelchair. 2. Turn the switch counterclockwise to decrease the speed of the wheelchair.
SECTION 4—JOYSTICK DESCRIPTIONS SPJ Diagnostic Indications of Wheelchair Status DISPLAY DESCRIPTION DEFINITION COMMENTS All three LEDs are off. Power is Off. All three LEDs are on. Power is On. Fewer than three LEDs on implies reduced battery charge. RED LED is flashing. Battery charge is low. The batteries should be charged as soon as possible. Left to Right “chase” alternating with steady display.
SECTION 4—JOYSTICK DESCRIPTIONS CSPJ Diagnostic Indications of Wheelchair Status DISPLAY DESCRIPTION DEFINITION COMMENTS All LEDs are off. Power is Off. All LEDs are on. Power is On. Fewer than three LEDs on implies reduced battery charge. Left RED LED is flashing. Battery charge is low. The batteries should be charged as soon as possible. Left to Right “chase” alternating with steady display.
SECTION 4—JOYSTICK DESCRIPTIONS SPJ+ and SPJ+ w/ACC Joystick Switches and Indicators NOTE: For this procedure, refer to FIGURE 4.2.
SECTION 4—JOYSTICK DESCRIPTIONS On/Off Button This button is located at the front of the joystick housing. It is used to turn the wheelchair on and off, to remove the joystick from sleep mode (if programmed) and to lock or unlock the joystick (if programmed). Speedometer The speedometer is used to show the maximum speed. The right-most LED indicates current maximum speed setting. The bottom left GREEN LED flashes to indicate that the joystick is in speed limit mode.
SECTION 4—JOYSTICK DESCRIPTIONS Joystick The joystick has proportional drive control, meaning that further the joystick is pushed from the upright (neutral) position, the faster the wheelchair or seat moves. Your top speed, however, is limited by the programmed settings. To slow the wheelchair to a stop, simply release the joystick. The wheelchair has automatic speed and direction compensation to minimize corrections.
SECTION 4—JOYSTICK DESCRIPTIONS INFORMATION GAUGE DISPLAY DESCRIPTION DEFINITION COMMENTS All LEDs are off. Power is off. All LEDs are on. Power is on. Fewer than three LEDs on implies reduced battery charge. Left RED LED is flashing. Battery charge is low. The batteries should be charged as soon as possible. Left to Right “chase” alternating with steady display. Joystick is in programming, inhibit and/ or charging mode. The steady LEDs indicate the current state of the battery charge.
SECTION 5—PERFORMANCE ADJUSTMENTS SECTION 5—PERFORMANCE ADJUSTMENTS Main Menu NOTE: For this procedure, refer to FIGURE 5.1. The first display screen shown after powering on the Remote Programmer is the Main Menu. The main menu consists of the following options: Performance Adjust, Programs, Other. The arrow to the left is the selection pointer. It can be moved up or down the main menu by pressing the up or down key.
SECTION 5—PERFORMANCE ADJUSTMENTS NX-LP NOTE: For this procedure, refer to FIGURE 5.3. The Performance Adjust Menu for NX-LP consists of the following: Remote Programmer ➜ FORWARD SPD TURNING SPD ACCELERATION - FWD ACCELERATION - REV REVERSE SPEED LCD Display FIGURE 5.3 Performance Adjust Menu - NX-LP Making Performance Adjustments WARNING DO NOT mismatch a program with the wheelchair type (i.e. selecting a rear wheel drive program for a center wheel drive wheelchair or vice versa).
SECTION 5—PERFORMANCE ADJUSTMENTS To change the programmed value for an option (i.e. Acceleration - FWD), press the so the selection arrow points to Acceleration - FWD. key FORWARD SPEED TURNING SPEED ➜ ACCELERATION - FWD ACCELERATION - REV Press the SELECT key. The display screen changes to the adjustment screen. The top line shows the function. The second line shows the value. At the bottom is a bar graph which shows the relative position of the current value to the total adjustment range.
SECTION 5—PERFORMANCE ADJUSTMENTS NX, NX-50, NX-75, NX w/ACC, and NX-B Controller Flowchart NOTE: For this procedure, refer to FIGURE 5.4. Below is a flowchart on how to use a hand held programmer to select and modify functions. FIGURE 5.
SECTION 5—PERFORMANCE ADJUSTMENTS Performance Menu Description The performance adjustment menu items are listed below with a description of each function. MENU ITEM DESCRIPTION FORWARD SPEED Sets the maximum forward speed. The fastest speed setting is 100%. Use the and keys to change the value. TURNING SPEED Sets the TURNING SPEED as a percentage of the maximum forward speed. The turning speed is independent of the forward speed setting so that the turning speed can be greater than the forward speed.
SECTION 5—PERFORMANCE ADJUSTMENTS NX-LP Controller Flowchart NOTE: For this procedure, refer to FIGURE 5.5. Below is a flowchart on how to use a hand held programmer to select and modify functions. FIGURE 5.
SECTION 5—PERFORMANCE ADJUSTMENTS Performance Menu Description The performance adjustment menu items are listed below with a description of each function. MENU ITEM DESCRIPTION FORWARD SPEED Sets the maximum forward speed. The fastest speed setting is 100%. Use the and keys to change the value. TURNING SPEED Sets the TURNING SPEED as a percentage of the maximum forward speed. The turning speed is independent of the forward speed setting so that the turning speed can be greater than the forward speed.
SECTION 6—REMOTE PROGRAMMER SECTION 6—REMOTE PROGRAMMER Overview NOTE: For this procedure, refer to FIGURE 6.1. The Remote Programmer is the information center of the control module. Through simple key sequences, the Remote Programmer allows modification of the performance characteristics, gives diagnostics information for troubleshooting and permits calibration of the control module. NOTE: The joystick power switch must be on for the programmer to operate.
SECTION 6—REMOTE PROGRAMMER Remote Programmer Terminology Function A function is a performance characteristic which can be adjusted or modified to improve the operation of the wheelchair for a particular control need. Two examples are: The forward speed function may be adjusted to a higher or lower speed the same way as you would adjust a trimpot in other controls. Stand-by Mode Function may be turned ON or OFF the same as a switch would be used. All functions are listed in a menu.
SECTION 6—REMOTE PROGRAMMER Description Of Remote Programmer Keys KEY DESCRIPTION POWER KEY The POWER key turns on and off the LCD display. Press the POWER key once and the display will come ON. Press the POWER key again and the display will turn OFF. MENU KEY The MENU key returns the LCD display to the previous screen. If a function is being adjusted, pressing the MENU key returns the display to the Performance Menu. Pressing the key again will cause the display to change to the Main Menu.
SECTION 7—PROGRAMS SECTION 7—PROGRAMS Program Settings WARNING DO NOT mismatch a program with the wheelchair type (i.e. selecting a rear wheel drive program for a center wheel drive wheelchair or vice versa). Confirm that the settings and program match the wheelchair before selecting or saving. Otherwise, unintended and unsafe joystick control of the wheelchair will occur, possibly resulting in serious bodily injury.
SECTION 7—PROGRAMS DEFAULT SETTINGS FOR NX FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 RWD 2-POLE RWD 4-POLE CWD 2-POLE FORWARD SPEED 95 90 95 TURNING SPEED 25 20 30 ACCELERATION - FWD 30 25 25 ACCELERATION - REV 30 20 25 TURN ACCELERATION 30 20 25 TURN DECELERATION 35 25 30 BRAKING FORWARD 50 50 50 BRAKING REVERSE 55 45 55 REVERSE SPEED 40 30 40 TREMOR DAMPENING 40 40 40 TORQUE 144 48 144 DEFAULT SETTINGS FOR NX-B FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 AT
SECTION 7—PROGRAMS DEFAULT SETTINGS FOR NX-50 FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 M41-1 M41-2 M41-3 FORWARD SPEED 90 90 90 TURNING SPEED 20 20 20 ACCELERATION - FWD 50 50 50 ACCELERATION - REV 20 20 20 TURN ACCELERATION 20 20 20 TURN DECELERATION 22 22 22 BRAKING FORWARD 50 50 50 BRAKING REVERSE 65 65 65 REVERSE SPEED 40 40 40 TREMOR DAMPENING 35 35 35 TORQUE 48 48 48 DEFAULT SETTINGS FOR NX W/ACC FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 MWD - M61 (1
SECTION 7—PROGRAMS DEFAULT SETTINGS FOR NX-75 FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 CWD M91 CWD M91 HD CWD M91 FORWARD SPEED 95 95 95 TURNING SPEED 20 20 20 ACCELERATION - FWD 20 20 20 ACCELERATION - REV 20 20 20 TURN ACCELERATION 25 20 25 TURN DECELERATION 35 20 35 BRAKING FORWARD 50 50 50 BRAKING REVERSE 55 55 55 REVERSE SPEED 50 40 50 TREMOR DAMPENING 35 40 35 TORQUE 36 36 36 DEFAULT SETTINGS FOR NX-LP FUNCTION PROGRAM 1 PROGRAM 2 PROGRAM 3 RWD 2-
SECTION 8—OTHER FUNCTIONS SECTION 8—OTHER FUNCTIONS Description of Other Functions Select OTHER from the main menu to display Motor Balance, Joystick Throw, Fault Log, and Usage Statistics. Use the and keys to select the function desired. The SELECT key will display the current value and permit modifications. Always press SAVE after changes are made. NOTE: At any point, press the MENU key to return to the previous screen.
SECTION 9—DIAGNOSTIC CODES SECTION 9—DIAGNOSTIC CODES What Are Diagnostics Codes? NUMBER OF FLASHES DIAGNOSTICS CODE ERROR CODE DESCRIPTION SUB CODE* DETAILS OF ERROR CODE POSSIBLE SOLUTION The joystick information gauge and the Remote Programmer give indications of the type of fault or error detected by the control module. When a fault is detected, the wheelchair will stop and not drive.
DIAGNOSTICS CODE ERROR CODE DESCRIPTION SUB CODE* DETAILS OF ERROR CODE 4 E04 Right Motor Fault 00 Right Motor Short Circuit 5 6 E05 E06 Left Park Brake Fault Right Park Brake Fault Part No 1110532 01 Right Motor Open Circuit 02 Right Motor Connection Fault B- 03 Motor Terminal Connected to B+ 04 Right Motor Voltage Fault 05 Right Motor Bridge Fault 06 Too Many Hardware Current Limit Events 07 Current Offset Out of Range 08 Hardware Current Limit Fault 00 Left Park Brake Dri
ERROR CODE DESCRIPTION SUB CODE* E07 Remote Fault 00 8 9 E08 E09 POSSIBLE SOLUTION DIAGNOSTICS CODE 7 DETAILS OF ERROR CODE NUMBER OF FLASHES SECTION 9—DIAGNOSTIC CODES Local SR Fault (CPU, EEPROM, etc.) Check the communications bus, connections and wiring. Replace the remote.
SECTION 10—CONNECTOR DESCRIPTIONS SECTION 10—CONNECTOR DESCRIPTIONS Controller Connector Descriptions NX, NX-50, NX-75, NX-B and NX-LP NOTE: For this procedure, refer to FIGURE 10.1. Front of Controller FIGURE 10.1 NX, NX-50, NX-75, NX-b and NX-LP NX w/ACC NOTE: For this procedure, refer to FIGURE 10.2. Front of Controller FIGURE 10.
SECTION 10—CONNECTOR DESCRIPTIONS Battery Connector Pinout NOTE: For this procedure, refer to FIGURE 10.3. PIN FUNCTION 1 Battery Positive 2 Battery Negative 2 1 FIGURE 10.3 Battery Connector Pinout Motor Connector Pinout NOTE: For this procedure, refer to FIGURE 10.4. 2 3 1 PIN FUNCTION 1 Motor Positive 2 Motor Negative 3 Park Brake Negative 4 4 Park Brake Positive FIGURE 10.4 Motor Connector Pinout Joystick Connector Pinout NOTE: For this procedure, refer to FIGURE 10.5.
SECTION 10—CONNECTOR DESCRIPTIONS NX, NX-50, NX-75, NX-B, and NX-LP NOTE: For this procedure, refer to FIGURE 10.6. PIN FUNCTION 1 Battery Positive 2 DCI Input (Drive Lockout) 3 --No Connection-- 4 Battery Negative 2 1 4 3 FIGURE 10.6 NX, NX-50, NX-75, nx-b, and NX-LP NX w/ACC NOTE: For this procedure, refer to FIGURE 10.7.
LIMITED WARRANTY PLEASE NOTE: THE WARRANTY BELOW HAS BEEN DRAFTED TO COMPLY WITH FEDERAL LAW APPLICABLE TO PRODUCTS MANUFACTURED AFTER JULY 4, 1975. This warranty is extended only to the original purchaser/user of our products. This warranty gives you specific legal rights and you may also have other legal rights which vary from state to state.