Troubleshooting
SYMPTOM: ‘Lost Data Link’ Safety Code #21/55
Losing the communication link to the external PowerLabs is almost always a sign of excessive noise from the
power supply. The switching noise levels increase as supply voltage and charging current increases, so it is quite
common that everything operates fine until a high-current charge is performed and then the communication link is
lost as the current is ramping up to a high-current charge.
SOLUTION: Test with a different power supply
Sometimes a defective or failing supply can begin producing excessive switching noise. To rule out the power
supply as the root cause, try powering your chargers from a different supply to see of the problem persists.
Testing with a battery supply of some kind is ideal, if available, since it doesn’t produce ANY switching noise
(unlike an AC/DC switching power supply).
SOLUTION: Ferrite Chokes
Assuming the excessive noise isn’t from a defective power supply, applying clip-on ferrite chokes can be a very
simple way to reduce the noise from the power supplies and/or chargers – apply chokes to one or more of the
following locations:
1.
ECM 3-wire JR servo/communication cables, preferably both ends
2. Power input cables, closest to the device
3. Power supply positive and negative output wires, close to the power supply (or supplies)
For the JR communication cables, 7mm chokes work well and provide enough space for the cable to be looped
through twice. For larger power cables, 10-12mm normally works best, but even larger sizes may be used to allow
the cable to be looped 2 or more times.
If applying ferrite chokes as described above does not resolve your communication problems, please contact
Revolectrix support below for further assistance.
SYMPTOM: Screen is all white on power-up
SOLUTION:
If the screen is all white on power-up, it means that the main processor is bypassing the normal application
startup - there are a couple possible reasons:
1. The firmware is corrupted (failed checksum calculation) and cannot be executed
This state can be confirmed by listening to the startup beeps. If the normal startup tone (3 quick
ascending beeps) is followed immediately by a single long beep, then the firmware is corrupt and needs
to be reloaded over USB via the PC Firmware Update Utility (see Upgrading BUMP Controller firmware
section). Firmware corruption should be extremely rare, but is possible, especially when operating in
conditions with extreme electrical noise. Taking precautions against electrical noise, such as applying
ferrite chokes to power supplies and cabling, can greatly reduce the risk of corruption.
2. Pressure is being applied to the LCD touchscreen on power-up
To Next Page
Loading...
Need help?
General
