Jumper 2 wires together
Slew Limit Switches IGO
This is the wiring that needs to be jumped in order for the operator to untwist the power cords
FM Gru won’t start
When trying to start crane, the PLC and the load sensor were not turning on. The top light on this device was flashing red.
This is an electronic circuit break. Found the short, and corrected. The red light can be pushed to reset.
Liebherr 81K.1 shutdown and won’t restart
The crane lost eception with the remote and shutoff. The operator tried to restart and it would not restart. The operator took a picture of the following code.
The code 0x 0400 means the remote is asked to start (restart), but there is a function being applied at the same time. The operator was in mid-swing when it lost reception and the operator did not release the joystick when he tried to restart. The picture shows this.
Liebherr 81K.1 won’t swing
Customer called and crane won’t swing. Crane will hoist and trolley, but no swing. Error code “E 705”. Slowing gear safety device. Thaddeus was able to FaceTime with customer and found slew drive circuit breaker was tripped.
Hup won’t slew after powered off for 10 min
Hup had zoning and slew encoders turned on. Encoders would pair, Zero slew angle would accept and zones worked after being set. Normal operation would resume, but the crane would not slew after being shut down at the base (CCT/SCM computers powered off) and restarted after 10 minutes. Scrolling through the menu zero angle wasn’t present. Operator reset zero angle and slew movement was regained until crane was powered off at the base.
1)Turn off Slewing encoder option, This will tell the CCT to not look at the encoder, the crane regained slew.
2) Check slewing encoders for faults. In this case, the main slewing encoder would flash a single red light.
3) replace slewing encoders and pair
4) turn on slewing encoder option
5)Set zero angle and zones
LMI screen won’t work. Says needs update
When you have the cab plugged in the LMI screens won’t work properly. If you don’t have a cab hooked up the screen in the electrical panel at base of crane will work just fine. If you have the cab plugged in the screen at the base of the crane will say needs up date. For the one in the cab to work correctly you need to unplug the the one at the base of the crane. The plug to unplug it is behind the screen.
Crane code for teach-in
51,52When teach-in T99 crane its limits you have to put your tech code into the remote. If you try to use the cranes password that screen will stay locked. You can use crane code to dismantle and erection.
Crane will not hoist
Crane will not hoist up or down. No fault on CCS, but drive shows “E OC” which means motor overcurrent.
Manually release brake, and fault changes to “E 68″ brake switch malfunction. This indicates that the drive is seeing an over current fault, and the brake is typically not the culprit. Verify brake is being released by drive, and verify brake disk adjustment. With brake manually released, the drum spins freely.
Found contactor K466M (motor heating) was stuck in the activated position. Could not release the contactor coil (contacts may be welded) Switched off Q407F, and crane hoists normally.
As drive would send voltage to motor to work, but motor was requiring more voltage than the drive was sending to rotate because it was heating the motor additionally. Drive would stop due to this ‘over current” sitauation.
T85A in Dismantle wouldn’t hoist K944A
Hoist Drive was saying it was RDY but had no functions on hoist. Erection aid was saying >30 dregrees and not =to 0 degrees went into the wire schematics and found out that K944A needs to be activated to get =0 degrees K944A was getting voltage but coil was to weak to pull in. Activated K944A and erection aid was now reading =0 degrees