Sinoboom AB16EJ Plus - Page 106

© Mar. 2023
94 AB16EJ Plus Maintenance Manual
ELECTRICAL SYSTEM
Table 8-8 Table of faults and solutions (Continued)
Fault Cause Solution
Platform leveling with
no response
Electrical failure
Check the wiring and control program
Low hydraulic system oil level Check the hydraulic oil level
Function solenoid problem
Check the function solenoid, adjust the pressure or
replace the function solenoid
Oil lines blocked Check the oil lines
Slave cylinder failure Repair or replace the cylinder
Pump damaged Replace the pump
Boom movement
switches on platform
controller 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.
Boom function switch not
enabled with the foot switch
depressed
Depress the foot switch again
Boom function switch failure
Repair or replace the control switch, and perform
system test
Lift, luffing cylinder holding
valve failure
Repair or replace the holding valve
Bypass valve malfunctioning
Repair or replace the valve, check the wiring diagram or
perform system test
Low hydraulic system oil level Check the hydraulic oil level
Supply pipelines in valve
housing or hydraulic pump
restricted or damaged
Clean or replace the pipeline
Directional valve
malfunctioning
Repair or replace the valve
Lift, luffing cylinder failure Repair or replace the cylinder
Boom movement
switches on ground
controller with no
response
The switch is not in correct
position
The key switch is in OFF position.
The ground controller is in platform control position.
The emergency stop button on the ground controller or
platform controller is pressed.
Boom function switch failure
Repair or replace the control switch, and perform
system test
Lift, luffing cylinder holding
valve failure
Repair or replace the holding valve
Bypass valve malfunctioning
Repair or replace the valve, check the wiring diagram or
perform system test
Low hydraulic system oil level Check the hydraulic oil level
Supply pipelines in valve
housing or hydraulic pump
restricted or damaged
Clean or replace the pipeline
Directional valve
malfunctioning
Repair or replace the valve