Keiser 1021 User Manual (English)

Questions and Answers:

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Michael AndersenAug 2, 2025
Why does my Keiser 1021 Air Compressor run too long?
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  William ClarkAug 2, 2025
  If your Keiser Air Compressor runs for over an hour and doesn't reach the shut-off pressure (around 120 psi), it's likely due to an air leak within the system or a blockage in the Dryer Module. Check for air leaks in the compressor and air line system. Disconnect all exercise machines, reset the compressor, and run it to see if it builds pressure and shuts off at 120 psi. If it does, the leak is probably in an exercise machine or the air supply line. Also, inspect the Dryer Module and Elbow Connector for corrosion; if found, replace them.
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joseph83Aug 6, 2025
What to do if Keiser 1021 Air Compressor has insufficient pressure?
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  Bryan MolinaAug 6, 2025
  If there's insufficient or no pressure build-up in the air tanks of your Keiser Air Compressor, it's probably due to a major air leak. Check the compressor hoses and fittings for leaks. Connect exercise machines to the compressor one at a time to check for leaks.
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Gina MillerAug 11, 2025
How to fix Keiser 1021 when motor start signal is not received?
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  Elizabeth JonesAug 11, 2025
  If the motor START signal isn't received by the Computer Control System (CCS) in your Keiser Air Compressor, it could be due to a major air leak or a motor/start circuit failure. * Check compressor hoses and fittings for leaks, and test exercise machines one by one. * Disconnect and reconnect the compressor to the power supply. Listen for the motor start and the Solenoid Valve click. * If the motor runs, check the plumbing connections. * If the motor doesn't start but the Solenoid Valve clicks, the motor is likely faulty and needs replacement. * If neither the motor starts nor the Solenoid Valve clicks, the Circuit Board is likely faulty and needs replacement.
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timothy13Aug 15, 2025
Why is my Keiser 1021 Air Compressor building pressure too slowly?
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  bobbybeckAug 15, 2025
  If the air pressure in your Keiser Air Compressor is building too slowly, the Inlet-Muffler Assembly might be dirty or blocked. Make sure the compressor is in a clean, dry, well-ventilated area and that the vents aren't blocked. If necessary, replace the Inlet-Muffler Assembly.
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Thomas MitchellAug 20, 2025
How to fix a Check Valve leak in Keiser 1021 Air Compressor?
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  Jennifer LangAug 20, 2025
  If a Check Valve leak is detected in your Keiser Air Compressor, the Check Valve has likely failed. Replace the Check Valve.
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mooreelizabethAug 23, 2025
What causes a Purge Valve leak in a Keiser 1021 Air Compressor?
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  Melissa LyonsAug 23, 2025
  A Purge Valve leak in your Keiser Air Compressor could be caused by a loose hose or fitting, a damaged o-ring, or a loose canister. Check for any loose connections, make sure the o-ring isn't damaged, and ensure the canister is properly threaded and snug on the bushing.
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Ashley WoodAug 27, 2025
What to do if there is a communication failure between Circuit Boards in Keiser 1021?
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  Todd JacksonAug 28, 2025
  If there's a communication failure between the two computer Circuit Boards in your Keiser Air Compressor, it's likely due to a damaged Communication Cable or a Circuit Board failure. Replace the Communication Cable. If that doesn't resolve the issue, replace the Circuit Board(s).