Error Codes - Giant MY20 Service Manual

5.4 ERROR CODES

As mentioned before, error codes are just an indication of hick-ups that happened. Unless stated otherwise by Service
Tool or Giant information, no part replacement is needed when an error code appears.
DISPLAY FAILURE CATEGORY
A1
SyncDrive
A2
RideControl
A3
Bluetooth
A4
EnergyPak
A5
Speed sensor
ERROR CODE
3A
MEMS self-test failure.
3B
No any data from MEME for constant time.
21
Drive chain system A communication failure
31
Torque sensor failure.
32
Torque sensor sudden fluctuation.
33
Torque sensor zero point shift.
34
Torque sensor locked with crank rotating.
35
Torque sensor locked at high voltage.
36
Torque sensor locked at middle voltage.
37
Torque sensor locked at low speed.
38
Auto running without crank rotating.
39
Crank rev sensor failure.
61
Current sensor offset.
62
Motor over current.
63
EEPROM failure.
64
Thermistor failure.
65
Circuit board over heat.
66
Invalid parameter.
67
Motor wire breaking.
68
Encoder failure.
F2
Drive chain system A wheel diameter failure
27
LCD module failure.
F5
Data ROM failure.
F6
Charging function failure.
28
Bluetooth module failure
72 Battery under voltage.
73
Battery over voltage.
CA
Data ROM error.
CB
Precharge time-out.
C1
Over charge.
C2
Over discharge.
C3
Charge over current.
C4
Discharge over current.
C5 Cell over temperature.
C6
Cell thermistor open.
C7
FET over temperature.
C8
FET thermistor open.
71
No battery message.
F1
Over charge 1 & 2.
F9
Cell imbalance.
69
Speed sensor failure
FAILURE TYPE ASSIST
On
Off
Off
On
On
off
on
on
85