V1.0
RUNGU Electric Juggernaut Mid-Drive Version (MDV) User Manual
–
2018 model year
Copyright 2018 Standard Bearer Machines, LLC
45
Troubleshooting
Problem: Why won’t my
MDV turn on?
After pressing the on/off key, the display fails to light up; no power is coming to the motor.
Solution:
1.
Press and hold the on/off key for at least one second. If that fails to turn on the display,
2.
Check the connector to the Display. If the Display is connected to the motor cable,
3.
Make sure the main connector from the battery output lead is plugged in and secure. Open the
main battery case and inspect the wiring to look for severed wires and make sure the large
yellow connectors are connected. Disconnect the large yellow connector - the battery from the
controller - and then reconnect the battery. Then press and hold the on/off key. If that fails to
turn on the display,
4.
Check that the battery is fully charged. Use a voltmeter and test the output on the charging
terminals if you do not have an ebike computer. If the voltage is at or below 42V, the battery is
fully discharged. If you are having trouble charging the battery, please look below about
charging your battery.
5.
If none of the proposed solutions work, contact Rungu.
Problem: I drove my MDV until it went completely dead and now it will not charge.
This is a problem that occurs when you fully deplete the battery. The BMS on the battery protects the
battery from discharging any further and force shuts itself off.
Solution:
Reset your battery by opening removing it from the battery case and disconnecting the battery from the
controller (large yellow connectors) and then reconnecting the battery. In most cases, this action is
sufficient to “wake up” the battery so it will charge again. IF this action fails to work contact
Rungu, to
order a special jump cable.
Problem: I cannot get my battery to charge or my charger is not working
The green light stays on when I know the battery is discharged or no light turns on at all when I plug the
battery into the charger.
Solution:
1.
If no light turns on when you plug the charger into the battery after plugging the charger into
AC, replace the fuse in your charger. Then try charging the battery again. If this fails to charge
the battery,
2.
Reset the battery (see above), and then plug it into the charger. If this fails to charge the
battery,
3.
Call Rungu to talk through other troubleshooting steps.
Problem: The MDV feels sluggish in difficult environments
Hills, snow, and soft sand will slow down the MDV and cause you to use more power and pedaling. This
is normal. If you feel like you have experienced better power in the past check the following items
Solution:
1.
Check the power level setting and make sure is at its highest setting.
2.
Change to a lower gear.
