Invacare Supply Group Health & Beauty - Popular Questions, Answers, Tips & Manuals

You should call the manufacturer for this type answer you need.

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Hi flashing lights 8 times (Controller fault.). if the batteries haven't been used for several years U might have to replace them .U can buy a BATTERY LOAD TESTER OF E/BAY cost approx,$36..this will give U an accurate test on the condition of the batteries ,good luck

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Make sure that you are charging the chair 12-14 hrs before driving. charge with the joystick on, make sure both freewheel levers are in locked position.

I’m happy to assist further over the phone at

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Test the battery voltage at the joystick where a programmer or charger would plug in. There are 3 holes, the top or number one hole is the positive hole for a voltage meter to plug into and the bottom or number two hole is the negative hole for the volt meter. Plug in the meter and see what the voltage is when sitting still and keep the meter in and see what the voltage does while you are driving the chair. The voltage should not drop more than 1 or 2 volts from that which you had when the chair was not moving. If the voltage drops more than that then there is a problem with charging or the new batteries. If the voltage remains good then the joystick or speed knob control could be the problem.

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hi, yes i can, i repaired one last week,

please contact me my details are on the website


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The red light is the power light and if the red light is blinking the charger is bad or the wiring is bad on the chair or the batteries are bad. Usually it's the charger.

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If you can ,first check for fluid loss, if this doesn't solve the problem you my have a bad drive bearing. GOOD LUCK FRIEND.

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It is usually on the serial number sticker, which can be hard to find or have been removed/fallen off. If you can find the serial number, your vendor or the Invacare Co. can tell you the model, etc.

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You are getting a motor error code. Check motor wiring and connection to the main control box. Motor may have gotten unplugged when changing the batteries.

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The red light on the transformer/Charger means the charger is bad. Sometimes it can also be battery harness wiring. Most often it is the charger that needs replaced.

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The M91 has an onboard charger. When unplugging the charger power cord from the wall outlet does not stop the chair from being in the charge mode, The charger has to be unplugged from the wheelchair wiring harness or main control module under the plastic body parts. The on-board chargers fail like this sometimes.

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The chair may be in what they call SLOW MODE or the batteries are weak. If you have powered seating on the chair the seat has sensors that make the chair drive slow or not drive at all when the seat is tilted or reclined or raised. A sensor can go bad or get out of position. The joystick could have different programming for different drive modes. Try changing drive modes.

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They are diagnostic codes to help troubleshoot a possible problem with your wheelchair. The lights blink in patterns. You have to count the number of blinks and what color they are.

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The ON button is at the top front of the joystick. If this button does not turn on the red, yellow and green lights there are many possibilities as to why it is not turning on. Batteries have to be checked first for proper voltage. Then wiring needs to be checked for proper connections and fuses checked.

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1 red + 5 green is left parking brake fault. This is a pretty generic code and can be something as simple as the brake/clutch lever is in free-wheel, or it can mean something more significantly wrong, depending on how it is wired in this model. (We don't work with Prontos a lot here.)

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Owners manual for TDX SP link above.

First check if you have power present at the charging port. If you have power (24 volts) then the batteries and wiring are not the issue. If you don't then check the battery post fuses. These are "L" shaped brackets with a white square fuse held on the positive post with a through bolt and nut. On older chairs these are known to become loose and or blow just when you need power or stop suddenly.
Also check the big Anderson connectors at the power point at the end of the battery box. Check for solid connections. If there is 24 volts here to the control box, next check the controller connector.
If there is +24 at the controller connector but 0 at the joystick charger port you have big issues. Either the traces connectors in the controller are fried or your joystick has major issues.

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