Ca3 shows high Watt but no movement

[mkaaskh]

Hi

So i got this bike that consists of CA3, grinfineon 40a, TC80 and 48v20ah batteries. I only got pas installed so no throttle.
It's been working great, but this morning when i powered up the system, the CA read from 3-6k watt from standstill -the number jumps up and down.
I see movement from the pas on the CA when i turn the crank, but the motor do not move at all.

Anyone tried the same or got any idea why? is the controller gone or maybe the CA?

 

[Peter.bp]

As CA registers high power, but no movement on motor, I'd suspect the shunt resistor on CA...
Try to disconnect CA and connect motor directly to controller first, as this will clear out the cause of the problem...

 

[teklektik]

CA-V3 PAS uses the power PID controller and so needs voltage and current values to work properly - both of which come in through the CA-DP connector (the 6 pin JST). The fluctuating readings suggest a bad connection and bogus shunt readings (current).

Start by re-seating the CA-DP connector. If this is not seated properly it could explain the lack of throttle signal as well.

You are in a bit of a pickle debugging-wise with no throttle, since disconnecting the CA is not an option.

If re-seating doesn't help, you can look at the CA for hints:

• The failure modes do not suggest that the PAS is itself a source of the problem although there are screens that could answer that, but...
• The Thr OUT voltage on the Diagnostics screen will tell you if the CA is trying to run the controller and the Limits Flags on the same screen will tell you what is in play to try to limit the CA output.

Beyond that, you are going to need to hook up a throttle in the simplest way possible to avoid introducing new variables - that means hooking it to the controller and disconnecting the CA.

 

[mkaaskh]

Thanks a million. I will get on it first thing tomorrow!

 

[mkaaskh]

You where right. The connector had gone bad from the weather here in Copenhagen, so i had to solder the wires together until I finde a replacement connector.

Thanks!

 

[rowbiker]

When you do get the new connectors installed (JST-XH-6), try adding a very light coating of dielectric grease on the metal pins. This will protect the pins (contacts) against corrosion from your salt air environment without adding a significant amount of resistance to the flow of electrons.

Also, as teklektik said, make yourself a simple throttle, using a 5K potentiometer, so that you have a useful testing tool for future use. Specific plans for such a throttle have been posted by teklektik previously on this forum. When you're ordering replacement JST connectors and pins for the CA3-DP connections, just include some extras for your home-made throttle. (Remember to prop up your bike so the driving wheel doesn't make the bike take off if you're experimenting with a manual throttle.)

 

[rowbiker]

Actually, the JST pins might be a different type -- SM? I always get the model designations confused with the type used for lipo balance leads ....

 

[teklektik]

Glad it got sorted!

 

[mkaaskh]

When you do get the new connectors installed (JST-XH-6), try adding a very light coating of dielectric grease on the metal pins. This will protect the pins (contacts) against corrosion from your salt air environment without adding a significant amount of resistance to the flow of electrons.

Also, as teklektik said, make yourself a simple throttle, using a 5K potentiometer, so that you have a useful testing tool for future use. Specific plans for such a throttle have been posted by teklektik previously on this forum. When you're ordering replacement JST connectors and pins for the CA3-DP connections, just include some extras for your home-made throttle. (Remember to prop up your bike so the driving wheel doesn't make the bike take off if you're experimenting with a manual throttle.)

Thanks for the advise I think i need to find some connectors that are more resistent to the weather here in the north. And order a simple throttle for future testning and tweaking..