The question of 1 is not detailed enough. At least, say whether there is pressure. If there is no pressure, let's see whether the mode-locking stroke is at 0, mode-locking or switching action is terminated. It is also possible that the computer board has no voltage output.

If there is pressure, check whether the valve is stuck, whether the manipulator is reset, whether the thimble is in place, whether the piston rod is broken and whether the safety stop is stuck.

1. check the 24V5A power supply in the electric box and replace the safety power box. 2. Check whether the valve core is stuck and clean the valve core. 3. Check whether the I/O board has output and whether the solenoid valve is charged. 4. Check whether the hydraulic safety switch is pressed and whether the mechanical lock lever baffle is opened.

3 There are many reasons for not conforming to the mold, which can be summarized as follows:

1. Mechanical failure: check the clamping cylinder.

2. Hydraulic fault: check the clamping valve card.

3. Circuit failure: Check the safety trip switch circuit.