Troubleshooting
3
Problem Possible Cause Fault Position Test & Solution
Fail to start/stops in
running
Weak connection of the
white cable
Battery
connection
terminals (base)
Open the housing, check if the white
cable that connects to the battery
connection terminal was insufficiently
soldered (weak connection), re-solder
the cable and check the function.
PCBA is broken PCBA Open the housing, replace the PCBA
Big deviation of the speed
sensor
Motor assembly
Open the housing, replace the motor
assembly
No oil lubrication
when cutting
Oiling hole in housing was
blocked by debris
Oil hole in
housing
Open the housing, clear the oil hole in
housing.
Oil pumper was blocked
by oil residue
Oil tank assembly
Open the housing, replace the oil tank
assembly
Plastic gear was worn out Plastic gear
Open the housing, replace the plastic
gear; check and clear the oil hole in the
housing.
Saw chain cannot or
bar
Guide bar was worn out Guide bar Replace the guide bar