PAT DS150 - Anti Two Block Problem Troubleshooting

Troubleshooting Flow Charts
27
Plug appropriate plug into socket of junction box.
Replace Anti-Two-Block switch.
PROBLEM: Function of Anti-Two-Block System is faulty.
START
Check to see whether or not crane is in two-block condition.
Correct?
No
Yes
Check if jumper/dummy plug in receptacle at boom nose is plugged in.
Refer to system wiring diagram.
Correct?
No
Yes
Turn power off or disconnect wire from connection board X1:35 in central unit. Remove
ohmmeter between wires 2 and 3 of switches or between terminals 1 and 6 at boom nose
box. This checks the function of the Anti-Two Block switch. Install bypass plug.
Switch closed = 0 Ohm (weight installed)
Switch open => 1 Megaohm (weight removed)
Refer to system wiring diagram.
Correct?
No
Anti Two Block Problem
Yes
Next Page
Lower hook down into safe position