Reason

Exclude

Natural decline in lift

One-way valve discharge

Check valve in the one-way valve. If you find a single valve sealing surface of the stolen goods, cleaning one-way valve.

Valve closed down strict

Check valve if there is power down if power is down valve itself rule out the failure or replace the valve down. Down valve slide valve must be kept clean, and mobile and flexible.

Drain the fuel tank

Replacement Cylinder seals

Lift does not drop

Down valve failure

In the case of pressing the button down, check valve if there is power down. Without electricity, to rule out; if electricity is down valve itself rule out failure, or replace the valve down. Down valve should be kept clean and lubricated.

Down speed control valve disorders

Control valve to adjust the rate of decline, such as the regulation is invalid valve replacement.

Reason

Exclude

L can not afford to lift

Voltage is too low

Check motor starter when the work load potential. Voltage range of hydraulic allow ± 10%

Motor does not

Check the motor and the circuit

Motor reverse

Any change in the two-phase three-phase line.

Motor Phase
（Motor does not move, and there is hum）

Check circuit breakers and electrical wiring.

Down valve open

Down button to release the state, with a voltage meter check valve if there is power down. If no power, check circuit, and troubleshooting; if electricity is down valve itself rule out failure. Down valve slide valve must be kept clean, and mobile and flexible.

Low pressure relief valve

Adjust relief valve. 100% of rated load adjustment

Oil level is too low, pump suction air

To fill the hydraulic oil

Suction filter blocked

Clean filter

Suction leak paragraph

Check suction pipe and fittings; Tighten fittings. If necessary, replace the connector.

Indicator light, press up button, the motor rotating the lift does not increase

Check with power ≥ contact after the electrical power received anti-reverse, just to correct the power can be.