Odd fault

[mikew8760]

I have an odd fault that ha recently happened. When attempting to drive off the bike suddenly stops dead. There is a small screen that shows some values, like speed, battery etc that disappears, i.e. goes blank. It will do nothing, e.g. switching the key-switch ON/OFF has no effect. However, I have found that plugging in the charger, even for a couple of minutes although the battery is fully charged, the display comes on. Then the process happens all over again. I'm really puzzled as to what is happening! There must be a fault somewhere, possibly in the controller, but not sure how to fault find this peculiarity.
Any useful suggestions welcome.

 

[saneagle]

I have an odd fault that ha recently happened. When attempting to drive off the bike suddenly stops dead. There is a small screen that shows some values, like speed, battery etc that disappears, i.e. goes blank. It will do nothing, e.g. switching the key-switch ON/OFF has no effect. However, I have found that plugging in the charger, even for a couple of minutes although the battery is fully charged, the display comes on. Then the process happens all over again. I'm really puzzled as to what is happening! There must be a fault somewhere, possibly in the controller, but not sure how to fault find this peculiarity.
Any useful suggestions welcome.

It's going off because it's lost its connection to the battery. You have to find out why.

Here's a description of how it works. You have two thick wires, red and black from the battery to the controller. They don't power the controller. Inside the controller, a branch is taken from each. A thin red and black go up to power the control panel, which activates when you switch it on. As well a switching on the control panel, the switch also switches on a third, normally blue, wire that runs back to the controller to power it. In other words, the control panel works a s remote switch for the motor controller. The control panel will always switch on as long as it has power, except occasionally when they get water inside.

You need to check where the circuit is broken when it's not working. There's not much point in checking it when it is working, other than for dirty connectors or damaged wires. An electric test will tell you exactly where the problem is. If you tell us more about your bike, we might be able to help with that.

 

[mikew8760]

Many thanks for your response. The bike in question is an EZee Forze made by Cycleezee. I think they are now defunct.
I'm still a bit puzzled as to why the application of the charger, which doesn't actually do any charge, seems to 'reset' the system. The LCD shows all the values and the little ON/OFF button works. A value of pedal assist can be changed, but as soon as the pedals turn and wheels move it all stops, again. I don't see this as an intermittent fault, unless the blue wire you mention is broken. I don't have any circuit diagrams, so I don't understand the purpose of the blue wire. I shall now go and have a good look under the bonnet!
Regards.

 

[saneagle]

Many thanks for your response. The bike in question is an EZee Forze made by Cycleezee. I think they are now defunct.
I'm still a bit puzzled as to why the application of the charger, which doesn't actually do any charge, seems to 'reset' the system. The LCD shows all the values and the little ON/OFF button works. A value of pedal assist can be changed, but as soon as the pedals turn and wheels move it all stops, again. I don't see this as an intermittent fault, unless the blue wire you mention is broken. I don't have any circuit diagrams, so I don't understand the purpose of the blue wire. I shall now go and have a good look under the bonnet!
Regards.

The break in the connection might be in the battery. If there's a fuse in the battery, check that it's in tight. As I said, a meter will tell you where the problem is, otherwise we can only guess.

 

[Nealh]

One possibility is the Forza's age and a knackered battery, even a kackered battery wiil show good charge.

Try rigging up a voltage meter to the battery and if need be the charger to allow power, with the drive wheel off the ground power the bike on to drive the motor wheel and watch the volatge meter and see what the voltage tells you .

 

[saneagle]

One possibility is the Forza's age and a knackered battery, even a kackered battery wiil show good charge.

Try rigging up a voltage meter to the battery and if need be the charger to allow power, with the drive wheel off the ground power the bike on to drive the motor wheel and watch the volatge meter and see what the voltage tells you .

That's a good point. I remember testing an old Ezee battery. It always showed 42v when charged and a nice evenely balanced cell set, but every time I tried to draw any current, the voltage totally collapsed.

 

[thelarkbox]

Plastic battery mounts can warp with age/elemental exposure removing battery contacts from optimum connecting positions, if the case, you may hear the odd pop and find the battery contacts appear to have arcing damage.
shims and wedges can help reposition a battery in its mount and make solid reconnections.

One older battery mount I use on my 'older backup bike' lost some of its retaining lugs and the battery could momentarily bounce out of contact if a bump was hit on the path at the wrong time, swapping the hailong battery connectors from spade type to the round pin type resolved the issue.

 

[Nealh]

If as siad the Forza is on it's original battery , then it is very highly likely at the end of life stage for the cells.
Ezee forza's must be at least 9 + years old now if not some will easy be 15 years.