Topic: Zero FXS cut-off when accelerating (Read 1076 times)

Allan · « **on:** March 13, 2022, 06:19:38 PM »

Hello guys,

I am new to electric biking, and have a problem with my 2016 Zero FXS.
When accelerating strongly it cuts the throttle, when accelerating slowly it keeps working. When turning the key off and on again, the throttle again works and the bike accelerates.

It has been stored in the shed for around 3 months, before I took it out yesterday. If I use it as a slow moped, then it works fine, but as soon as I turn the throttle it cuts off.

Downloaded the log from the bike and a log parser (available here https://zero-motorcycle-community.github.io/browser-parse/ )

Maybe this part with the max voltage difference is important:
07912 03/13/2022 09:45:21 Module 01 vmod: 108.932 maxsys: 108.932 minsys: 108.932 diff: 0.000 vcap: 94.187 prechg: 86%
07913 03/13/2022 09:45:21 DEBUG: Module 01 Contactor is now Closed
07914 03/13/2022 09:45:21 INFO: Enabling External Chg 0 Charger 2
07915 03/13/2022 09:45:21 INFO: Enabling External Chg 1 Charger 3
07916 03/13/2022 09:45:27 Riding PackTemp: h 8C, l 8C, PackSOC: 77%, Vpack: 92.379V, MotAmps: 97, BattAmps: 74, Mods: 10, MotTemp: 22C, CtrlTemp: 9C, AmbTemp: 8C, MotRPM:2317, Odo: 6238km
07917 03/13/2022 09:45:27 Batt Dischg Cur Limited 226 A (86%), MinCell: 3292mV, MaxPackTemp: 8C
07918 03/13/2022 09:45:32 WARNING: Max allowed voltage difference is 500mV
07919 03/13/2022 09:45:47 Power Off Key Switch

Hope someone here has tried or heard about something similar.
/Allan

Zero Bike log excerpt:
07858 0 DEBUG: Reset: Power-On, External
07859 0 Power On Key Switch
07860 0 Key On
07861 0 DEBUG: Module scheme changed from None mode to Stopped mode
07862 0 Module 00 vmod: 0V, batt curr: 0A
07863 0 Module 01 vmod: 0V, batt curr: 0A
07864 0 DEBUG: Module scheme changed from Stopped mode to Running mode
07865 1 Module 01 CAN Link Up
07866 1 Module 01 serial: 16sg2120, vmod: 109.048V
07867 03/13/2022 09:34:11 Sevcon Turned On
07868 03/13/2022 09:34:12 CAN1 BIT0 error. count=1
07869 03/13/2022 09:34:12 Sevcon CAN Link Up
07870 03/13/2022 09:34:13 DEBUG: Sevcon Contactor Drive ON.
07871 03/13/2022 09:34:13 Module 01 vmod: 109.165 maxsys: 109.165 minsys: 109.165 diff: 0.000 vcap: 97 prechg: 88%
07872 03/13/2022 09:34:13 DEBUG: Module 01 Contactor is now Closed
07873 03/13/2022 09:34:13 INFO: Enabling External Chg 0 Charger 2
07874 03/13/2022 09:34:13 INFO: Enabling External Chg 1 Charger 3
07875 03/13/2022 09:34:19 Riding PackTemp: h 6C, l 6C, PackSOC: 79%, Vpack:108.939V, MotAmps: 0, BattAmps: 1, Mods: 10, MotTemp: 19C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07876 03/13/2022 09:34:41 ABS SILA reporting an error
07877 03/13/2022 09:34:54 DEBUG: Module scheme changed from Running mode to Stopped mode
07878 03/13/2022 09:34:54 DEBUG: Module mode Change Does Not Require Disconnect
07879 03/13/2022 09:35:19 Disarmed PackTemp: h 6C, l 6C, PackSOC: 79%, Vpack:108.822V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 21C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07880 03/13/2022 09:36:19 Disarmed PackTemp: h 6C, l 6C, PackSOC: 80%, Vpack:108.765V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 21C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07881 03/13/2022 09:37:19 Disarmed PackTemp: h 6C, l 6C, PackSOC: 80%, Vpack:108.711V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 21C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07882 03/13/2022 09:38:19 Disarmed PackTemp: h 7C, l 6C, PackSOC: 80%, Vpack:108.671V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07883 03/13/2022 09:39:19 Disarmed PackTemp: h 7C, l 7C, PackSOC: 80%, Vpack:108.631V, MotAmps: 0, BattAmps: 1, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07884 03/13/2022 09:40:19 Disarmed PackTemp: h 7C, l 7C, PackSOC: 80%, Vpack:108.587V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07885 03/13/2022 09:41:19 Disarmed PackTemp: h 7C, l 7C, PackSOC: 80%, Vpack:108.553V, MotAmps: 0, BattAmps: 2, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07886 03/13/2022 09:42:19 Disarmed PackTemp: h 7C, l 7C, PackSOC: 79%, Vpack: 108.52V, MotAmps: 0, BattAmps: 1, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07887 03/13/2022 09:43:19 Disarmed PackTemp: h 7C, l 7C, PackSOC: 79%, Vpack:108.482V, MotAmps: 0, BattAmps: 1, Mods: 10, MotTemp: 20C, CtrlTemp: 6C, AmbTemp: 8C, MotRPM: 0, Odo: 6237km
07888 03/13/2022 09:43:24 DEBUG: Module scheme changed from Stopped mode to Running mode
07889 03/13/2022 09:43:24 DEBUG: Module mode Change Does Not Require Disconnect
07890 03/13/2022 09:44:19 Riding PackTemp: h 7C, l 7C, PackSOC: 78%, Vpack: 97.569V, MotAmps: 53, BattAmps: 45, Mods: 10, MotTemp: 20C, CtrlTemp: 9C, AmbTemp: 8C, MotRPM:2585, Odo: 6237km
07891 03/13/2022 09:45:14 Power Off Key Switch
07892 03/13/2022 09:45:14 Sevcon Turned Off
07893 03/13/2022 09:45:14 Module 00 vmod: 0V, batt curr: 0A
07894 03/13/2022 09:45:14 Module 01 vmod: 104.849V, batt curr: 65535A
07895 03/13/2022 09:45:14 INFO: Disabling External Chg 0 Charger 2
07896 03/13/2022 09:45:14 INFO: Disabling External Chg 1 Charger 3
07897 03/13/2022 09:45:15 CPU Soft Reset: Power Down Interrupted by Key On
07898 0 DEBUG: Reset: Software
07899 0 BMS Reset Software
07900 0 Key On
07901 0 DEBUG: Module scheme changed from None mode to Stopped mode
07902 0 Module 00 vmod: 0V, batt curr: 0A
07903 0 Module 01 vmod: 0V, batt curr: 0A
07904 0 DEBUG: Module scheme changed from Stopped mode to Running mode
07905 0 Module 01 CAN Link Up
07906 0 Module 01 serial: 16sg2120, vmod: 105.038V
07907 03/13/2022 09:45:18 Module 01 CAN Link Down
07908 03/13/2022 09:45:18 Module 01 CAN Link Up
07909 03/13/2022 09:45:20 Sevcon Turned On
07910 03/13/2022 09:45:21 Sevcon CAN Link Up
07911 03/13/2022 09:45:21 DEBUG: Sevcon Contactor Drive ON.
07912 03/13/2022 09:45:21 Module 01 vmod: 108.932 maxsys: 108.932 minsys: 108.932 diff: 0.000 vcap: 94.187 prechg: 86%
07913 03/13/2022 09:45:21 DEBUG: Module 01 Contactor is now Closed
07914 03/13/2022 09:45:21 INFO: Enabling External Chg 0 Charger 2
07915 03/13/2022 09:45:21 INFO: Enabling External Chg 1 Charger 3
07916 03/13/2022 09:45:27 Riding PackTemp: h 8C, l 8C, PackSOC: 77%, Vpack: 92.379V, MotAmps: 97, BattAmps: 74, Mods: 10, MotTemp: 22C, CtrlTemp: 9C, AmbTemp: 8C, MotRPM:2317, Odo: 6238km
07917 03/13/2022 09:45:27 Batt Dischg Cur Limited 226 A (86%), MinCell: 3292mV, MaxPackTemp: 8C
07918 03/13/2022 09:45:32 WARNING: Max allowed voltage difference is 500mV
07919 03/13/2022 09:45:47 Power Off Key Switch
07920 03/13/2022 09:45:47 Sevcon Turned Off
07921 03/13/2022 09:45:47 Module 00 vmod: 0V, batt curr: 0A
07922 03/13/2022 09:45:47 Module 01 vmod: 104.073V, batt curr: 0A
07923 03/13/2022 09:45:48 INFO: Disabling External Chg 0 Charger 2
07924 03/13/2022 09:45:48 INFO: Disabling External Chg 1 Charger 3
07925 03/13/2022 09:45:48 CPU Soft Reset: Power Down Interrupted by Key On
07926 0 DEBUG: Reset: Software
07927 0 BMS Reset Software
07928 0 Key On

Allan · « **Reply #1 on:** March 13, 2022, 10:22:42 PM »

OK, it seems that this is solved by simply charging the bike to full.
When I experienced the problem, the bike was at 70-80% charge.

After a full charge to 100% she is back to her brutal self. It took only minutes to bring the battery level down to 32% without having any cut-offs in the process.

There is a tiny voice in my head that says this problem could return, but I don't listen to the voices anymore

TheRan · « **Reply #2 on:** March 14, 2022, 01:26:30 AM »

If the bike had been sitting for 3 months then it's possible that the cell voltage went out of balance. Cell balancing only happens after the bike has hit 100% so it's a good idea to full charge it every once in a while.

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Author Topic: Zero FXS cut-off when accelerating (Read 1076 times)

Allan

Zero FXS cut-off when accelerating

Allan

Re: Zero FXS cut-off when accelerating

TheRan

Re: Zero FXS cut-off when accelerating