Sinoboom AB16EJ Plus - Page 107

ELECTRICAL SYSTEM
AB16EJ Plus Maintenance Manual 95
© Mar. 2023
Table 8-8 Table of faults and solutions (Continued)
Fault Cause Solution
Lift, luffing cylinder failure Repair or replace the cylinder
Turntable failed to
rotate to certain
direction
Hydraulic pipeline or
connector blocked
Clean, repair or replace the pipeline or connector
Directional valve
malfunctioning
Clean, repair or replace the directional valve
Rotation control handle
malfunctioning
Clean, repair or replace the rotation control handle
Turntable rotating to
the left/right abnormally
Low hydraulic system oil level Check the hydraulic oil level
Insufficient lubrication for
slewing bearing
Lubricate the bearing as needed
Slewing motor functioning
abnormally
Repair or replace the slewing motor
Slewing bearing excessively
worn
Slewing bearing
Throttle valve blocked
Clean or replace the throttle valve
Chassis failed to steer
Function solenoid failure or
low steer pressure
Check the function solenoid and adjust the pressure
Cylinder failure Clean, repair or replace the cylinder
Low hydraulic system oil level Check the hydraulic oil level
Pump with no pressure oil
output
Check the pump for damage
Travel control with no
response
The switch is not in correct
position
The key switch is in OFF position.
The ground controller is in ground control position.
The emergency stop button on the ground controller or
platform controller is pressed.
Electrical failure
Check the wiring and control program
Travel motor damaged
Replace the travel motor
Pump damaged Replace the pump
Motor controller damaged. Replace the motor controller.
Invalid brake release valve
Check the valve for blocking and leakage.
Insufficient brake release
pressure
Adjust the brake release pressure
Forward function failed
while with no warning
Forward traveling function is
malfunctioning.
Check whether the PWM plug of the ground controller is
inserted correctly and securely.
Check whether the connection of the forward valve is
normal.
Inspect whether the ground controller is malfunctioning.
Backward function
failed while with no
warning
Backward traveling function is
malfunctioning.
Check whether the PWM plug of the ground controller is
inserted correctly and securely.
Check whether the connection of the forward valve is
normal.
Inspect whether the ground controller is malfunctioning.