Slew, Trolley, and hoist drives begin start sequence, then power down. Check incoming power. It is possible L1 of the circuit isn’t there, but the other two legs will be the ones providing 48V and 24V to feed processor and start sequence. It will be backed up by the U100N not being powered.
Slow Trolley, Hoist
81K Crane hoist speed was slow. (no zones, Load plus was turned off) hoist speed was the same as if the micro movement button was pressed. The crane threw code E2647 DC undervoltage
Found the generator idle speed switch was at Low, flipped the switch to High restarted the crane.
How to move trolley in mounting
When in mounting to move trolley you need to push the auxiliary button on the side of the remote wait for the Hydraulic pump to stop and then you have functions of trolley in. In order to get trolley out you have to by pass all the sensors on the LOGO by holding down the down arrow button and the esc button.
Phase Monitoring Relay added
There has been a phase monitoring relay added to Liebherr 81K.1.
It monitors voltage (high and low), frequency (high and low), phase loss and phase order. The display will show all 3 lines of voltage, and relay status. If the relay opens it will shut off crane the same as an e stop, and the message on the remote will show E stop pushed. The display of the relay will flash and an error message will display above the voltage read out.
RL1.PL – Phase loss (one leg is no producing voltage)
RL1.PR – Phase Reverse (Phase order needs changed)
RL1.OV – Over voltage
RL1.UV – Under voltage
RL1.OF – Over frequency
RL1.UF – Under frequency
FLT.INT – Voltage interruption
FM Gru Electrical Schematics
When look at a component in the electrical cabinet or wire, the number indicates what page in the schematics that the component can be found at. For example, 6U1 is the hoist inverter (VFD) found on page 6. Wire #1503 is found on page 15 and is wire# 03 in a sequence.
S=Hoist (pg 6)
R=Slew (swing) (pg 9)
C=Trolley (pg 12)
F=BrakeKL= Safety validation for the drives
Potain HDT 80 in luffed postion
With the new Autec remote from CLS you must jumper the hoist and the trolley if you want the postion to be on switch 8.
103 to 104 Trolley
and
35 to 36 Hoist
These where each running through the U902N (Gold Box) and when the switch was in position 8 running through K938A
Potain HDT80 400953 RMC Crane edited wiring diagram for Luffed
De-rating a crane via Potain Connect Access App
Derating is available in Potain Connect thru the Remote Configuration menu. The submenu Crane Performance Limitation will be the menu where you make the adjustment. Toggling the button from off to on is the first step in the process. From there, a popup window will appear asking you to validate your selection. This will reduce both moment and load to 50 percent. Remotely this is the only option for derating the performance. For deactivating the limitation, it is the reverse process.
If the crane is off when you make the limitation selection, the limitation will turn on or off with a few second’s delay. If the crane is turned on, the action of activating or deactivating will not occur until the crane is turned off the next time.
There is no pop-up window on the operators display for limitation when the limitation is done remotely. The operator will see the max pick weight decreased and moment % increase
81K port connection Error – Bad 24V supply and KF2
When the remote shows port connection error it is an indication a Node on the CAN bus is offline. See (CAN BUS CODES) to access the node tree.
In this case the KF2 I/O module was bad.
Found the T7 24Volt power supply light was not on. Internal fuse was blown.
This supply runs the 24V power for the CPU and I/O card. When the power supply was replaced port connection error was still present. Found that cpu was powered and was registering on the node tree but the rest of the nodes beyond the CPU were offline.
The start command wasn’t being fed to the F10 safety switch. This command is supplied by the CPU and turns on power to the drives. The electrical Schematic lists +A-Q0 as the main start contactor this is actually contactor +A-K001 in the cabinet.
When the contactor was manually activated the drives would fire up. It was determined the KF2 needed replaced to complete the logic sequence . Once replaced, the remoted connected and the crane started.
The KF2 is housed along with the KF1. Unbolt the KF1 from the housing (6- T15 Torx bit screws ) and disconnect the ribbon connector to separate the KF1 from the KF2.
81K CAN Bus Codes
E1502 = CPU (=S1+A-KF1)
E1503 = Control Stand Right (=P1+H-S1)
E1504 = ICN_D64 (=S1+A-KF3)
E1505 = Control Stand Left (=P1+DK-S1)
E1506 = ICN_D32 (Manual Mode 125%) (=S1+A-KF4)
E1509 = Radio remote control (=S1+A-KF14)
E1511 = AKS_unigate (Anti Collision) (=S1+A-KF13)
E1513 = EMS Electronic Monitoring System Display (CAB) (=L+A-P0)
E1514 = Display CGM (=S1 +A -P9)
E1515 = Load Measuring Axle (load Pin) (=F+H-B4)
E1517 = Load Moment Sensor (=A+A-B17)
E1518 = Hook height sensor (=A+H-B5)
E1521 = KAW Sensor Trolley sensor (=C+K-B1)
E1522 = WIW-FC Hoist Frequency Drive (=S1+H-T1)
E1526 = KAW-FC Trolley Frequency Drive (=S1+K-T1)
E1531 = Anemometer (=C+K-B1)
To access CAN Diagnostic Turn off the power to the crane. Open the panel behind receiver and turn the CAN Diagnostic key to the right. Turn the crane back on and wait for the CAN Bus screen to boot.
Find the node that is causing the error.
Power off the crane, switch the CAN DIAG back to the left, fix the component that isn’t registering.
Any Error 1500-1550 indicates the component is no longer on the Bus. The CAN bus is not active for some reason it is possible for the error 1514 to be indicated in the Display as the CPU can no longer communicate with the display via the disrupted bus. Even replacing the CGM Display with not correct the problem!
E1514 Code
Operator lost all functions and the remote displayed Port Connection Error .
The electrical panel PLC displayed an hour glass and E1514. Crane would not start.
Any Error 1500-1550 indicates the component is no longer on the Bus. The CAN bus is not active for some reason it is possible for the error 1514 to be indicated in the CGM as the CPU can no longer communicate with the CGM display via the disrupted bus. Even replacing the CGM Display with not correct the problem!
Switched crane to scaling position 1 on the three position key. This would allow the crane to start.
Crane had zero for jib length. The crane has lost jib information and needs to be reconfirmed
Press F3 for scaling summary. All icons should have a checkmark next to it.
Liebherr Scaling Screenshot
Any icons that have a “X” next to it need to be reconfirmed. F1 to previous screen, and F2 to confirm each icon. Must confirm the OK at the end as well.