Reason

Excluded

Voltage is too low

Check the motor load when working starter potential. Voltage fluctuationrange allows ± 10%

Motor does not turn

Check motor and circuit

Motor Rewind

Any change in the two-phase three-phase line

Motor phase (the motor does not move, and there isbuzz)

Check the circuit breakers and electrical wiring

Lowering valve open

Button is released in the fall state, check with a voltmeter lowering valvehas power. If not, then check the wiring and troubleshooting; if there is power, check the drop valve itself fails, or replace lowering valve. Lowering valve lubricant must be kept clean, and the mobile and flexible.

Low pressure relief valve

Re-adjust the relief valve. At 100% of rated load adjustment

Oil level is too low, thepump suction air

Fill the hydraulic oil

Suction filter blocked

Clean the filter

Oil leak paragraph

Check the suction pipe and fittings, tighten the connector, if necessary,replace the connector.

Overload

Reduce the load, non-overloading use.

Discharge check valve

Check valve one-way valve. If you find that the check valve sealing surfaceof stolen goods, cleaning the check valve.

Lowering valve closed lax

Check the lowering valve has power. If there is power then check the dropdown valve itself is faulty or replace the valve. Lowering valve lubricantmust be kept clean, and the mobile and flexible.

Drain the fuel tank

Replace cylinder seals

Lowering valve failure

Press the down button on the case, check the lowering valve has power.Without electricity, trying to exclude; if electric, check the drop down valve itself is faulty or replaced valve. Lowering valve should be kept cleanlubrication.

Lowering speed control valve disorders

Adjust lowering speed control valve, such as mediation fails, replace thenew valve.