Precor Error Code 46 Low Battery Voltage

Mar 15, 2022

Applies to All self-powered equipment:

• EFX, AMT, UBK, RBK, and CLM
• Chrono bikes

EFX, AMT, UBK, RBK, and CLM

Issue symptoms

The operating system monitors the battery voltage. If the battery voltage falls below 11 Vdc when stride height movement is initiated (AMT12) or the battery voltage falls below 10 VDC after the ramp movement has been initiated (EFX), ramp movement will be stopped and the message Error 46 will be displayed. Stride Height motion will not be enabled until the battery voltage exceeds the above limits. The battery voltage must be raised either by battery charging or battery replacement. This is a battery problem and not an incline system problem.

Possible causes:

• An open 10A slow blow fuse (AMT12 only) on the battery terminal, faulty.
• Poor connection on the battery
• Lower PCA, or a depleted battery.

Note: This error is rarely reported on self-powered bikes and climbers.

Troubleshooting steps

1. AMT12 only: Remove the fuse from the in-line fuse holder on the positive battery cable. Measure the fuse with an ohmmeter; the fuse should read approximately 1 ohm or less. If the ohmmeter reading is high, replace the fuse.
2. Check battery cable connector for shorts or poor connections.
3. Enter the CrossRamp test on the console. Connect a DC voltmeter to the J3 connector on the lower PCA with the red lead on the red wire and the black lead on the black wire. Using the STRIDE HEIGHT control, operate the incline. The voltmeter should read approximately +12 VDC when the incline is instructed to move upward and approximately -12 VDC when the incline is instructed to move downward. If either voltage measurement is significantly low, replace the battery.

Chrono bikes

Issue symptoms

The error is only detected while not pedaling because, when pedaling, the generator SHOULD be charging the battery and have a higher voltage. This can be a temporary condition that has been corrected by a rider pedaling and recharging or with the use an external charger.

Troubleshooting steps

1. Run the Battery Voltage service test to measure real-time voltage when not pedaling. Battery should be above 5.8 VDC.
2. Verify the generator voltage is adequate during this test by selecting the Generator Voltage test. Should read approximately 9 VAC at 60 RPM.
3. If the battery voltage increases when pedaling above 55 RPM, but the battery was in a low state (5.5 – 5.7 VDC), verify the unit is routinely used. Low use can result in battery drain over time and an external charger may be needed.
   1. Batteries below 5.4 VDC that can’t be brought up or hold a charge should be replaced.
4. If the battery voltage doesn't increase when pedaling above 55 RPM, the LPCA may have a problem with its charging circuit and need to be replaced.