Failure Diagnosis - KEEWAY FACT 50 4T Maintenance Manual

Preparing principles
Battery
Magnetor
Voltage
regulator
Tightening torque force
Rectifier bolt
High-voltage coil fixing bolt 9.0 N·m
Flywheel fixing nut
Body guard bolt

1.2 Failure diagnosis

Power supply dead
Battery overdischarge
Unconnected battery wiring
Fuse blow
Poor switch
Low voltage
Poor battery charging
Poor contact
Poor charging system
Poor voltage/current regulator
Item
Capacity/Type
Voltage Fully charged
（20 ）
Necessary
charging
Charging current
Charging time
Capacity
Impedance of lighting coil
（20 ）
Impedance of charging coil
（20 ）
Type
Limited Lighting
voltage limit
Charging
limit
5.0 N·m Universal fixing spanner
5.0 N·m
9.0 N·m Multimeter
Interrupted current
Poor contact of the charging wire
Poor contact of the charging system
Poor contact or short circuit of the lighting system
Poor charging system
Poor contact, short circuit or open circuit of wire terminals
Poor voltage/current regulator
Poor magnetor
Standard: 10-15 hours，quick: 30 mins
Between white-black 1.5-2.0Ω
Single-phase semiwave SCR charging SCR semiwave
Tools
Flywheel remover
Test instrument
56
Specifications
12V-4AH/ dry-charged
13.1V
12.3V(not working for 1h)
Standard: 0.4A，quick: 4A
90W/8000rpm
Between green/red-black 2.0-2.5Ω
short-circuit
14.0V±0.4V/5000rpm
13.5V/5000rpm
14.8V±0.4V/5000rpm