On a stair lift, specifically models like Acorn and Brooks straight stairlifts, a C4 code indicates a medium battery voltage level, meaning the battery is at approximately half charge and is actively receiving a charge. This status is considered normal operation for the stair lift's battery management system.
Understanding the C4 Code on Your Stair Lift
Stair lifts are designed with sophisticated battery management systems to ensure continuous operation, even during power outages. The C4 code is not an error but rather an informational code that informs you about the current charging state of your stair lift's batteries.
- Medium Charge: The C4 code signifies that the batteries are at a moderate charge level, typically around 50%.
- Active Charging: When this code is displayed, it means the charging circuit is engaged, and the batteries are actively being topped up. This is a normal part of the stair lift's charging cycle, especially if it has recently been used or if it has been parked for a while and is not yet fully charged.
Why C4 is a Normal Status
Unlike critical error codes that require immediate attention (such as C7 for low power supply), the C4 code simply indicates that your stair lift is functioning as intended in managing its power. Stair lifts are designed to charge whenever they are parked on their charging points, which are usually at the top or bottom of the stairs. As the battery charges from a medium level towards full, the code will likely progress through other normal battery status indicators.
Here's a quick look at common battery status codes you might encounter:
| Code | Meaning | Solution |
|---|---|---|
| C4 | Medium battery voltage level, half charge active | Normal |
| C5 | High battery voltage level, sustained charge active | Normal |
| C6 | Battery full, no charge active | Normal |
As you can see, C4, C5, and C6 are all considered "Normal" statuses, reflecting the various stages of the battery's charge cycle.
What to Do When You See C4
When a C4 code appears on your stair lift's display:
- No Action Required: Since C4 is a normal operational status, you do not need to take any specific action.
- Ensure Parking at Charge Point: Simply ensure your stair lift is parked correctly on its charging points (usually at the top or bottom of the rail) so it can continue to charge.
This code provides reassurance that your stair lift's battery system is working correctly to maintain power, ensuring your lift is ready for use whenever you need it.
