Hello, I have a Bafang G311 (front hub geared) motor from Grin with Baserunner controller and 52V em3ev battery. The kit is about 4 months old with 400 miles on it. A couple days ago I noticed the following in order:
I sent Grin an email though in my experience they can a while to respond especially with the weekend coming. This is my only form of transportation so I'm eager for help diagnosing the issue quickly, hoping you all can help me. I connected it to the Phaserunner suite via USB cable and ran through the autotune and didn't see anything suspicious (except it was loud as it was spinning). Thanks so much!
- Fluttering sound, not unlike the usual sound, but louder, at times loud enough to make it hard to hear music from a smartphone on handlebars at max volume. The sound is not present when the motor is not getting power (e.g. coasting or just pedaling) and the sound is not much different when the motor is first engaged or in steady state.
- (After a few miles) Seemed like hitting the throttle was producing less thrust than usual even though the power displayed on the CA is plenty (500 W say).
- Started going easy on the throttle. But then I noticed motor overheating. I monitored temp in a 5 minute period of an average of 200 W power on pretty flat road, the motor temp went from 75 C to 120 C before getting limited. I don't ever remember it getting temp limited before even going up a steep hill at 500 - 700 W for 5 minutes.
- Once it got hot the speedometer was jumping all over the place from 15 mph to 25 mph in less than a second, and back down. Even though there was very little change in speed. I stopped using the motor at this point.
I sent Grin an email though in my experience they can a while to respond especially with the weekend coming. This is my only form of transportation so I'm eager for help diagnosing the issue quickly, hoping you all can help me. I connected it to the Phaserunner suite via USB cable and ran through the autotune and didn't see anything suspicious (except it was loud as it was spinning). Thanks so much!
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