SCHUNK PSH 22, Assembly And Operating Manual, Page: 27 / 36

Troubleshooting
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27
6 Troubleshooting
6.1 Product is not moving
Possible cause Corrective action
Base jaws jam in housing, e.g. mounting
surface is not sufficiently even. Check the evenness of the mounting surface.
Mechanical connection [
}
19]
Loosen the mounting screws of the product
and actuate the product again.
Pressure drops below minimum. Check air supply.
Pneumatic connection [
}
22]
Compressed air lines switched. Check compressed air lines.
Pneumatic connection [
}
22]
Proximity switch defective or set incorrect. Readjust or change sensor.
Unused air connections open. Close unused air connections.
Flow control valve closed. Open the flow control valve.
Component part defective. Replace component or send it to SCHUNK
for repair.
6.2 The module does not travel through the entire stroke
Possible cause Corrective action
Dirt between the housing, base jaws,
guidance- and piston bar. Clean and lubricate product., Maintenance [
}
29]
Pressure drops below minimum. Check air supply., Pneumatic connection [ } 22]
Mounting surface is not sufficiently flat. Check the evenness of the mounting
surface.,
Mechanical connection [ } 19]
Components have come loose e.g. due to
overloading. Send product with a SCHUNK repair order or
dismantle product.
6.3 Product opens or closes abruptly
Possible cause Corrective action
Too little grease in the mechanical guiding
areas. Clean and lubricate product.
Maintenance [ } 29]
Compressed air lines blocked. Check compressed air lines of damage.
Mounting surface is not sufficiently flat. Check the evenness of the mounting surface.
One-way flow control valve is missing or
adjustet incorrectly. Install and adjust one-way flow control
valve.
Loading too large. Check permissible weight and length of the
gripper fingers.