Product Manual

Page 9 of 13
Troubleshooting
No.
Issue
Possible Cause
Possible Solution
1
The forks cannot
be lifted
① Overload
Reduce the load
② The pressure of the
overflow valve is too low
Adjust the pressure higher
③ Internal abnormal leakage
in the lifting oil cylinder
Replace the seals
④ Insufficient hydraulic oil
Add appropriate quantity of
filtered hydraulic oil
⑤ Insufficient voltage of the
storage battery
Charge the battery
⑥ The power switch has not
been turned on.
Turn on the power switch
⑦ Electric lock is locked or
damaged
Unlock the electric lock or
repair
⑧ Damaged oil pump motor
Repair or replace
⑨ Damaged oil pump
Repair or replace
⑩ Damaged lifting button
Repair or replace
2
The forks cannot
be lowered
① Internal doorframe is
overloaded and deformed
Repair or replace
② External doorframe is
overloaded and deformed
Repair or replace
③ Dead frame roller
Repair or replace
④ Frame guiding rod is bent
or damaged
Repair or adjust
⑤ Oil return hole is blocked
Clean
⑥ The electromagnetic
valve is out of control
Repair or replace
3
Reduced end
voltage of the
battery
① Damage of individual
battery
Repair or replace
② Lower level of the
electrolytic solution
Add electrolytic solution
③ Foreign matters in the
electrolytic solution
Replace electrolytic solution