626 Chair Troubleshooting Charts

Symptom Probable Cause Check Solution
No functions will operate. Supply voltage. Check power cord connections. Secure power cord connections at wall outlet and chair base.
Check facility circuit breaker. Reset facility circuit breaker.
Check facility supply voltage. Contact electrician to modify voltage if necessary.
Primary fuse(s) blown. Check if LED’s are not illuminated on Motor Control PC board. Replace blown fuse.
Test fuses at chair base. Replace blown fuse.
Loose or faulty wire connections. Check wire connections between power inlet and Motor Control PC board. Secure or replace loose wire connections.
Symptom Probable Cause Check Solution
No power at chair receptacle(s). All other functions work. Receptacle circuit breaker (s). Check if receptacle circuit breaker(s) tripped. Reset receptacle circuit breaker(s). Refer to User’s Guide.
Receptacle circuit breaker faulty. Replace circuit breaker.
Primary fuse(s) blown. Test fuses at chair base. Refer to:Receptacles / Fuses and Connections Replace blown fuse.
Loose or faulty wire connections. Check wire connections. Refer to:Receptacles / Fuses and Connections Secure or replace loose wire connections.
IEC inlet malfunctioning. Check voltage out of IEC inlet. Refer to:Receptacles / Fuses and Connections Replace IEC Inlet.
Isolation transformer. Check output voltage at isolation transformer. Refer to:Receptacles / Fuses and Connections Replace faulty isolation transformer.
Symptom Probable Cause Check Solution
Drawer heater does not warm up. Heater switch does not illuminate. Drawer heater switch. Test drawer heater switch. Refer to: Drawer Heater Switch Replace faulty switch.
Primary fuse(s) blown. Test fuses at chair base. Refer to: Drawer Heater / Fuses and Connections Replace blown fuse.
Loose or faulty wire connections. Check wire connections. Refer to: Drawer Heater / Fuses and Connections Secure or replace loose wire connections.
Isolation transformer. Check isolation transformer output voltage. Refer to: Isolation Transformer Replace faulty isolation transformer.
Drawer heater does not warm up. Heater switch-OK (illuminates). Loose or faulty wire connections. Check wire connections. Refer to: Drawer Heater / Fuses and Connections Secure or replace wire connections.
Drawer Heater Plate. Test drawer heater plate Refer to: Drawer Heater Plate Replace Drawer Heater Plate.
Drawer heater-OK. Heater switch does not illuminate. Drawer heater switch. Replace drawer heater switch. Replace faulty switch.
Symptom Probable Cause Check Solution
Chair continuously beeps. Overtravel limit switch “Open”. Check limit switch. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Base Function Components
On Motor Control PC board J12 connection jump orange wires for overtravel limit switch. Refer to: Base Function / Fuses and Connections Replace defective limit switch. Refer to: Base Function Components
Loose or faulty overtravel limit switch wire connections. Check wires connections between Motor Control PC board and limit switch. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.
Symptom Probable Cause Check Solution  
No Base or Back functions. Hand/Foot control malfunctioning. (ALL) If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.  
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Replace faulty Hand/Foot control.  
Hand/Foot control malfunctioning. (Wireless) Check if Control Lockout is enabled. Disable Control Lockout. Refer to: User Guide.  
Check if controller is associated with chair. Perform Association Procedure. Refer to: Association Procedure.  
Check if batteries have a low charge. Replace size: AA batteries.  
Loose or faulty inlet harness connection. Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Base and Back Functions / Fuses and Connections  
Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Base and Back Functions / Fuses and Connections  
Primary fuse(s) blown. Test fuses at chair base. Replace blown fuse. Refer to: Base and Back Functions / Fuses and Connections  
Motor Control PC board fuse(s) blown. Test F1 and F2 fuses. Replace blown fuse. Refer to: Base and Back Functions / Fuses and Connections  
Loose or faulty limit switch(es) wire connections. Check wires connections between Motor Control PC board and limit switch(es). Secure or replace loose wire connections.Refer to: Base and Back Functions / Fuses and Connections  
Passive PFC PC board. Check input and output voltage at Passive PFC PC board. 115 VAC Replace Passive PFC PC board.Refer to: Base and Back Functions / Fuses and Connections  
Chair is slow / stutters when moving Base or Back. Wired and wireless scale controllers are active at the same time. Check to ensure that either a wired OR wireless scale hand control is connected. Not both at the same time. To use wired scale control (Updated from wireless), remove the batteries from the wireless control or ensure the wireless control has timed out. To use the wireless control, unplug the wired scale control.  
Symptom Probable Cause Check Solution  
Chair stops and beeps. Patient weight exceeded 650 lbs. Check if patient weight exceeded the 650 lb. weight limit. Inform staff that maximum patient weight is 650 lbs.  
Active Sensing Technology™ activated. Check if chair came in contact with another object. Remove object from beneath drawer.  
Active Sensing Technology™ switch(es). Check Active Sensing Technology Switch(es) Refer to: Active Sensing Technology™ Switches  
On Motor Control PC board J13 connection jump white wires for AST switches. Refer to: Base Function / Fuses and Connections Replace defective switch(es). Refer to: Active Sensing Technology™ Switches  
Loose or faulty Active Sensing Technology™ switch wire connections. Check wires connections between Motor Control PC board and AST switches. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections. Refer to:Active Sensing Technology™ Switches  
Overtravel limit switch. Check limit switch. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Base Function / Fuses and Connections  
On Motor Control PC board J12 connection jump orange wires for overtravel limit switch. Refer to: Base Function / Fuses and Connections Replace defective limit switch. Refer to:Base Function / Fuses and Connections  
Loose or faulty overtravel limit switch wire connections. Check wires connections between Motor Control PC board and limit switch. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.  
System malfunction. Check error code on Diagnostic PC board. Refer to:Recalling Error Codes  
No Base up or Base down. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.  
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.  
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Motor Control PC board fuse(s) blown. Test F1 and F2 fuses. Refer to: Base Function / Fuses and Connections Replace blown fuse(s).  
Base up/down limit switch(es). Check limit switch(es) using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch(es). Refer to: Base Function Components  
On Motor Control PC board J12 connection jump black/black and white/white wires for Base limit switches. Refer to: Base Function / Fuses and Connections Replace defective limit switch(es). Refer to:Base Function Components  
Loose or faulty Base up/down limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.  
Check wires connections between Motor Control PC board and limit switches. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.  
Overtravel limit switch. Check limit switch using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Base Function Components  
On Motor Control PC board J12 connection jump orange wires for overtravel limit switch. Refer to:Base Function / Fuses and Connections Replace defective limit switch. Refer to: Base Function Components  
Loose or faulty overtravel limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.  
Check wires connections between Motor Control PC board and limit switch. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.  
Motor Control PC board. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, if movement. Refer to: Base Function / Motor Control PC Board Test Replace defective Motor Control PC board.  
Base actuator motor. Perform Base actuator motor resistance test. Refer to: Base Actuator Motor Resistance Test Replace defective motor. Refer to: Base Function Components  
Base actuator. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, Refer to: Base Actuator Test if there is movement. Replace defective Base actuator. Refer to: Base Function Components  
No Base up or Base down, motor is running. Base actuator motor coupler. Inspect motor coupler for damage. Refer to: Base Function Components Replace defective motor coupler.  
No Base Up, Base Down is OK. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.  
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.  
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Base up limit switch. Check limit switch using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Base Function Components  
On Motor PC board J12 connection jump white wires for Base up limit switch. Refer to: Base Function / Fuses and Connections Replace defective limit switch. Refer to: Base Function Components  
Loose or faulty Base up limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.  
Check wires connections between Motor Control PC board and limit switch. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.  
Motor Control PC board. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, if movement. Refer to: Base Function / Motor Control PC Board Test Replace defective Motor Control PC board.  
Base actuator motor. Perform Base actuator motor resistance test. Refer to: Base Actuator Motor Resistance Test Replace defective motor. Refer to: Base Function Components  
Base actuator. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, if movement, Refer to: Base Actuator Test Replace defective Base actuator. Refer to: Base Function Components  
No Base Down, Base Up is OK Hand/Foot control malfunctioning. If possible, use known working Hand/ Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.  
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.  
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Base Function / Fuses and Connections  
Base down limit switch. Check limit switch using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Base Function Components  
On Motor Control PC board J12 connection jump black wires for Base down limit switch. Refer to: Base Function / Fuses and Connections Replace defective limit switch. Refer to: Base Function Components  
Loose or faulty Base down limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.  
Check wires connections between Motor Control PC board and limit switch. Refer to: Base Function / Fuses and Connections Secure or replace loose wire connections.  
Motor Control PC board. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, if movement. Refer to: Base Function / Motor Control PC Board Test Replace defective Motor Control PC board.  
Base actuator motor. Perform Base actuator motor resistance test. Refer to: Base Actuator Motor Resistance Test Replace defective motor. Refer to: Base Function Components.  
Base actuator. Move wires connections J4 to J2 and J15 to J16 on Motor Control PC board. Use Back function on controller, if movement, Refer to: Base Actuator Test. Replace defective Base actuator. Refer to: Base Function Components.  
Symptom Probable Cause Check Solution
Chair stops and beeps. Patient weight exceeded 650 lbs. Check if patient weight exceeded the 650 lb. weight limit. Inform staff that maximum patient weight is 650 lbs.
System malfunction. Check error code on Diagnostic PC board. Refer to: Recalling Error Codes
No Back Up or Back Down. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Motor Control PC board fuse(s) blown. Test F1 and F2 fuses. Refer to: Back Function / Fuses and Connections Replace blown fuse(s).
Back up/down limit switch(es). Check limit switch(es) using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch(es). Refer to: Back Function Components
On Motor Control PC board J13 connection jump grey/grey and white/white wires for Back limit switches. Refer to: Back Function / Fuses and Connections Replace defective limit switch(es). Refer to: Back Function Components
Loose or faulty Back up/down limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.
Check wires connections between Motor Control PC board and limit switches. Refer to: Back Function / Fuses and Connections Secure or replace loose wire connections.
Motor Control PC board. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement, Refer to: Back Function / Motor Control PC Board Test Replace defective Motor Control PC board.
Back actuator motor. Perform Back actuator motor resistance test. Refer to: Back Actuator Motor Resistance Test Replace defective motor. Refer to: Back Function Components
Back actuator. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement, Refer to: Back Actuator Test Replace defective Back actuator. Refer to: Back Function Components
No Back Up or Back Down, motor is running. Back actuator motor coupler. Inspect motor coupler for damage. Refer to: Back Function Components Replace defective motor coupler.
No Back Up, Back Down is OK. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Back up limit switch. Check limit switch using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Back Function Components
On Motor Control PC board J13 connection jump grey wires for Back up limit switch. Refer to: Back Function / Fuses and Connections Replace defective limit switch. Refer to: Back Function Components
Loose or faulty Back up limit switch wire connections. Check wires connections using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Secure or replace loose wire connections.
Check wires connections between Motor Control PC board and limit switch. Refer to: Back Function / Fuses and Connections Secure or replace loose wire connections.
Motor Control PC board. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement... Refer to: Back Function / Motor Control PC Board Test Replace defective Motor Control PC board.
Back actuator motor. Perform Back actuator motor resistance test. Refer to: Back Actuator Motor Resistance Test Replace defective motor. Refer to: Back Function Components
Back actuator. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement, Refer to: Back Actuator Test Replace defective Back actuator. Refer to: Back Function Components
No Back Down, Back Up is OK. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.
Loose or faulty inlet harness connection. Check inlet harness using Diagnostic PC board. Refer to: Hand / Foot Control Diagnostic Test Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Check inlet harness connections at Motor Control PC board and chair base. Secure or replace inlet harness connections. Refer to: Back Function / Fuses and Connections
Back down limit switch. Check limit switch using Diagnostic PC board. Refer to: Limit Switch Diagnostic Test Replace defective limit switch. Refer to: Back Function Components
On Motor Control PC board J13 connection jump white wires for Back down limit switch. Refer to: Back Function / Fuses and Connections Replace defective limit switch. Refer to: Back Function Components
Loose or faulty Back down limit switch wire connections. Check wires connections between Motor Control PC board and limit switch. Refer to: Back Function / Fuses and Connections Secure or replace loose wire connections.
Motor Control PC board. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement... Refer to: Back Function / Motor Control PC Board Test Replace defective Motor Control PC board.
Back actuator motor. Perform Back actuator motor resistance test. Refer to: Back Actuator Motor Resistance Test Replace defective motor. Refer to: Back Function Components
Back actuator. Move wires connections J2 to J4 and J16 to J15 on Motor Control PC board. Use Base function on controller, if movement, Refer to: Back Actuator Test Replace defective Back actuator. Refer to: Back Function Components
Symptom Probable Cause Check Solution
Chair does not return to the programed Home position. All other functions work. Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair. Replace faulty Hand/Foot control.
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.
Chair not calibrated. Perform Chair Position Calibration Procedure. Calibrate chair. Refer to: Chair Position Calibration Procedure
Programed Home position was changed. Check if Home was re-programed. Program Home function to desired position. Refer to: User Guide.
The Home Function only moves the Base. Automatic Back Lockout is engaged. Check if Automatic Back Lockout is engaged. Disengage the Automatic Back Lockout. Refer to: Automatic Back Lockout

Symptom

 Probable Cause Check Solution  
Chair does not position to the programed Quick Exam® Function position. All other functions work. Hand/Foot control malfunctioning. If possible, use known working Hand/ Foot control from another like chair. Replace faulty Hand/Foot control.  
Check Hand and Foot controls using Diagnostic PC board. Refer to: Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.  
Chair not calibrated. Perform Chair Position Calibration Procedure. Calibrate chair. Refer to: Chair Position Calibration Procedure  
Programed Quick Exam® position was changed. Check if Quick Exam® was re programed. Program Quick Exam® function to desired position. Refer to: User Guide.  
The Quick Exam® Function only moves the Base. Automatic Back Lockout is engaged. Check if Automatic Back Lockout is engaged. Disengage the Automatic Back Lockout. Refer to: Automatic Back Lockout  
Symptom Probable Cause Check Solution
Upholstery heater does not warm up. Heater switch does not illuminate. Upholstery heater switch. Toggle switch and check for continuity between white and green wires at J5 connection of Upholstery Heater PC board. Replace upholstery heater switch.
Upholstery Heater PC board fuse(s) blown. Test fuses. Replace blown fuse(s)
Loose or faulty wire connections. Check wire connections. Refer to: Upholstery Heater / Fuses and Connections Secure or replace loose wire connections.
Upholstery Heater PC board. If LE1 and LE2 LED’s are illuminated... Replace Upholstery Heater PC board.
Upholstery heater does not warm up. Heater switch-OK (illuminates). Loose or faulty wire connections. Check wire connections. Refer to: Upholstery Heater / Fuses and Connections Secure or replace loose wire connections.
Seat upholstery heater does not warm up. Back heater is OK. Seat upholstery heater. Move wires connections J1 to J2 and J2 to J1 on Upholstery Heater PC board. If Seat does not heat, replace Upholstery.
Back upholstery heater does not warm up. Seat heater is OK. Back upholstery heater. Move wires connections J1 to J2 and J2 to J1 on Upholstery Heater PC board. If Back does not heat, replace Upholstery.
Upholstery heater is OK. Heater switch does not illuminate. Upholstery heater switch. Replace upholstery heater switch. Replace faulty switch.
Symptom Probable Cause Check Solution
Nothing is displayed on the digital display. Chair functions OK. Time out feature activated. Press Zero button to reactivate display. Inform operator of the time out feature.
Hand/Foot control malfunctioning. If possible, use known working Hand/Foot control from another like chair. If known working control operates chair, replace faulty Hand/Foot control.
Check Hand and Foot controls using Diagnostic PC board. Refer to:Hand Foot Control Diagnostic Test Replace faulty Hand/Foot control.
Faulty PC board in controller. Check for error code(s) Refer to:Recalling Error Codes Replace controller PC board.
The measured weight of patient is inaccurate. Scale is not zeroed. Check if operator failed to zero scale before seating patient. Refer to:Scale Operation in Users Guide.
Improper zeroing of scale. Check if operator zeroed scale with patient onboard. Refer to:Scale Operation in Users Guide.
Tension on Hand Control cord. (Wired Control Only) Check if operator failed to zero scale with Hand Control in holster. Refer to: Scale Operation in Users Guide.
Check if operator failed to weigh patient with Hand Control in holster. Refer to:Scale Operation in Users Guide.
The patient’s feet are making contact with the floor after the weight button has been pressed. Check that the patient is properly seated. Refer to:Scale Operation in Users Guide.
Check if stop button was depressed while chair was automatically raising. Refer to:Scale Operation in Users Guide.
Scale system is not calibrated. Verify calibration. Refer to:Scale Calibration Procedure Calibrate scale.
Obstruction under or around chair base. Check for any obstruction under or around chair. Remove obstruction.
Wired foot control cord under table. Remove cord from under the table. Adjust load cell feet so cord can not fit under table. (1/2 turn - 2 turns from tight)
Chair not level. Check each corner of chair base for level. Refer to:Set Up Instructions.
Load cell connections. Check load cell connections on Vitals Interface PC board. Secure or replace loose wire connections.
Defective load cell(s). Test load cells. Refer to:Load Cell Test - Hand Control or Load Cell Test - Diagnostic PCB. Replace defective load cell(s)
Faulty Vitals Interface PC board. Check for error code(s) Refer to:Recalling Error Codes Replace Vitals Interface PC board.
Hand control displays “999” for a weight value. Scale system is not calibrated. Verify calibration. Refer to:Scale Calibration Procedure Calibrate scale.
Hand control displays
“ERROR SCALE-VSM”. (No weight detected from Load Cells)		 Scale is not zeroed. Check if operator failed to zero scale before seating patient. Refer to:Digital Scale Functions in User Guide
Clean Assist™ Roller System. If Clean Assist™ Roller System is activated. Deactivate Clean Assist™ Roller System.Zero the scale.
Refer to:Clean Assist™ Roller System in User Guide
Obstruction under or around chair base. Check for any obstruction under or around chair. Remove obstruction. Zero the scale.
Load cell connections. Check load cell connections on Vitals Interface (Scale) PC board. Secure loose wire connections. Refer to: Wiring Diagrams. Zero the scale. Refer to:Wiring Diagrams
Defective load cell(s). Test load cells. Refer to:Load Cell Test (Hand Control) or Refer to: Load Cell Test (Diagnostic PCB) Replace defective load cell(s). Zero the scale.
Faulty Vitals Interface (Scale) PC board. Check for error code(s) Refer to: Recalling Error Codes Replace Vitals Interface (Scale) PC board. Zero the scale.
Loose/Faulty wire connections. Check all wire connections associated with the Wired Scale Control PC board. Secure loose wire connections. Zero the scale.
Wired Scale Control PC board. Check for error code(s) Refer to: Recalling Error Codes Replace Wired Scale Control PC board. Zero the scale.