FAQ - EC200 Pro

The seat height can be adjusted according to your sitting position:

To lower the seat height:

• Sit on the chair and rotate the height adjustment lever located underneath the seat, near the rear side of the seat.
• The chair will gradually lower.

To raise the seat height:

• Stand up from the chair first to reduce the weight on the seat.
• Rotate the height adjustment lever underneath the seat, near the rear side of the seat.
• The chair will rise to the desired height.

The EC200 Pro supports four reclining positions: 90°, 105°, 120°, and 130°.

Enable the reclining function:

• Pull the adjustment lever on the right side of the chair outward.
• The backrest will be unlocked and can recline freely.

Lock the backrest at your desired angle:

• Pull the adjustment lever outward to unlock the reclining function.
• Slowly lean back until the backrest reaches your preferred angle.
• Push the adjustment lever fully back to its original position.
• A clicking sound indicates that the backrest has been successfully locked.

Release the reclining lock:

• Apply slight backward pressure on the backrest to release the internal locking pressure.
• Pull the adjustment lever outward again to adjust the reclining angle.

Adjust the seat depth:

Move the seat forward:

• Lean back slightly while applying gentle forward pressure with your hips.

Move the seat backward:

• Release pressure from your hips and allow the seat to slide backward naturally.

If the reclining resistance feels too tight or too loose, you can adjust it using the tension knob located underneath the chair.

• Turn the tension knob to adjust the reclining resistance according to your personal preference.
• Continue adjusting the tension until the reclining movement feels comfortable and smooth.

Possible Causes:

• The height adjustment lever is not fully engaging with the gas lift control valve.
• The gas lift may become stuck after supporting weight for a long period of time.
• The adjustment method may not be performed correctly.

Solutions:

• Make sure the adjustment lever is fully pressed into position. Try gently moving the lever up and down.
• To lower the seat height, remain seated on the chair and apply appropriate downward pressure while operating the lever.
• To raise the seat height, stand up from the chair first, then operate the adjustment lever.
• If the height still cannot be adjusted, check whether the gas lift is functioning properly.
• If the issue continues, contact ProtoArc Customer Support for further assistance.

Possible Causes:

• The adjustment lever is not fully locked.
• The backrest has not reached the correct locking position.
• Pressure on the backrest is preventing the locking mechanism from engaging properly.

Solutions:

• Adjust the backrest to your desired angle, then fully move the adjustment lever back to the locked position.
• When locking the backrest, check whether you hear the locking mechanism click into place.
• If the lever cannot be operated, gently lean back slightly to release pressure inside the mechanism, then try adjusting it again.
• If the backrest still cannot be locked, contact ProtoArc Customer Support for further troubleshooting.

Possible Causes:

• The recline tension knob is not adjusted properly.
• The screws connecting the backrest and base mechanism are loose.
• Moving parts may create friction after extended use.

Solutions:

Adjust the recline tension knob:

• Turn the knob clockwise to increase reclining resistance.
• Turn the knob counterclockwise to decrease reclining resistance.

Check the screws:

• Check whether the screws connecting the backrest and the base mechanism are loose.
• If any screws are loose, tighten them securely using the appropriate tool.

Reduce friction:

• If the noise continues, apply a small amount of suitable lubricant to the moving connection points.

If the issue remains after trying the solutions above, please contact ProtoArc Customer Support and provide relevant details for further assistance.

After a chair has been used for a period of time, noises may occur due to:

• Metal friction between moving parts.
• Slightly loose screws or components.
• Insufficient lubrication in moving mechanisms.

These are common causes of chair noises.

Check and tighten the screws:

• Check all screws under the chair, especially the connections between the base mechanism and the seat.
• If any screws are loose, tighten them and test whether the noise disappears.

Check the base connections:

• Confirm that the base mechanism, gas lift, and seat connection points are installed correctly.
• Loose connections may cause noise during use.

Apply lubricant:

• If the noise comes from moving parts of the base mechanism, apply a small amount of suitable lubricant to the connection points to reduce friction.

Identify the source of the noise:

Test the chair in different situations:

• Does the noise occur when sitting down or standing up?
• Does the noise occur when adjusting the seat height?
• Does the noise occur when reclining or returning the backrest?
• Does the noise occur when rotating the chair?

Testing these situations can help identify the exact source of the noise.

If the issue cannot be resolved after completing these steps, please provide:

• Your order number.
• The chair model.
• A video showing the noise and the source of the sound.

Our support team will investigate further and provide a suitable solution.

This usually happens when:

• The reclining lock mechanism is engaged too tightly.
• Excessive backward pressure causes the internal gears or locking pins to become firmly engaged.
• The adjustment lever cannot return to its normal position due to pressure inside the mechanism.

Step 1: Confirm the backrest lock status

• Check whether the backrest adjustment lever or control handle is in the unlocked position.
• Move the control lever to the unlocked position if necessary.

Step 2: Apply slight backward pressure

• While sitting on the chair, gently lean backward to release the internal locking mechanism.
• At the same time, operate the backrest adjustment control lever.

Step 3: Adjust the backrest angle

• Keep the control lever in the unlocked position.
• Slowly move the backrest forward or backward.
• Once you find the desired angle, release the lever to lock the backrest again.

Step 4: Check for obstructions

• Check whether any foreign objects are blocking the backrest connection area.
• Confirm that the adjustment mechanism is moving properly.

If the issue still cannot be resolved, please provide:

• The chair model.
• Photos or videos showing the issue.
• Your order information.

Our support team will assist you with further troubleshooting and provide a suitable solution.