Sinoboom TB20J Plus - Electrical Symbols

ELECTRICAL SYSTEM
TB20J Plus Maintenance Manual 121
© Feb. 2023
Table 9-3 Table of faults and solutions (Continued)
Fault Cause Solution
Pump damaged Replace the pump
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.
Tilt warning
The level switch is abnormal
The level switch air bubble is not in the middle position.
The level switch is not connected properly or firmly.
The ground controller is malfunctioning.
No overload warning
Weight sensor not calibrated
for rated load or calibrated
with wrong lift height
The sensor is not calibrated.
The wiring of the load sensor is incorrect.
The sensor is malfunctioning.
Machine travels and
then stops
intermittently
The battery level is low/the
calibration is incorrect
Re-calibrate the parameters.
The battery is out of power, not as indicated by the
battery gauge.
Parameters after
setting could not be
saved successfully
after several attempts.
Abnormal storage
The parameters exceed the limit.
Ground controller malfunctioning.
9.4 ELECTRICAL SYMBOLS
Table 9-4
Symbol Description
Buzzer
Valve
Table 9-4 (Continued)
Symbol Description
Two lines connected
Motor
M
θ
M
θ
MP
CHARGE
+
-
兰
黑
棕
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682 46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
兰
黑
棕
CHARGE
+
-
1
1
2
2
A A
B B
更改文件号
审 核
工 艺
处数
标记
设 计
日 期
共 页
签 字
标准化
日期
图 样 标 记
第 页
比 例
重 量
姚剑
银友国
刘奇志 2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
M
θ