AE5105/AE5105-3
33
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Chapter VI Common Faults
S/N Common Faults Solution
1 Button fails to work Replace the button
2 Contactor fails to operate after energization Replace the contactor
3
The contactor fails to be energized and
operate
Inspect the button and limit switch
4
Oil leakage occurs at the connection of
hydraulic system
Replace the joint or oil pipe
5 Oil leakage occurs in the cylinder
Replace the sealing ring, or replace the cylinder in the worse case
6 The bracket arm teeth do not engage well Adjust the position of the bracket arm teeth
7 Safety rope gets loose Adjust the latch to tighten the safety rope
8 Severe burrs appear on the balance wire rope Replace the wire rope
9
Left and right sliding tables fails to fall to the
same safety position
Adjust the balance wire rope nut to synchronize the sliding
tables
10 Automatic oil return volume drops Replace the oil return valve or lowering flow regulating valve
11
No oil is pumped out when the three-phase
motor is working
The motor rotates reversely. Replace two adjacent power phase
wires (commonly known as live wires)
12
Abnormal sound is heard in the three-phase
motor, or the motor is powerless
Phase loss occurs in the motor, thus inspect the incoming power
wire 380VAC with a multimeter
13
The lowering speed is too low when the lift is
loaded
Inspect if the oil return valve and lowering flow regulating valve
are blocked by foreign matters
14 The lift shakes during operation
Apply grease to the post slideway; inspect if the output pressure
of the hydraulic station is stable enough; inspect the cylinder
piston rod for climbing. (Replace it if any)
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