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.
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.
ACS380 5091 Code
TA21-312-C – FCAN CARD IMMUNITY ON ACS380_EN
The slewing ACS380 drive stops during a deceleration phase of the slewing motion, the drive indicates a 5091 status.
Here are three possible fixes besides replacing the Can Card
Slew Limit Switches IGO
This is the wiring that needs to be jumped in order for the operator to untwist the power cords
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
Hup Slew limit
On the Hup cranes we have slewing limit switches. We also have the option slewing encoders and the collector option.
• The limit switches (S610S and S615S) work only when the options are not enabled (angle, Top Zone and collector)
• If the top zone option is enabled we must also enable the angle option. When the 0° angle is enabled, the slewing movement cuts will be made by the encoders (B260N and B261N) and from 0°.
• If the collector option is activated, we bypass the limit switches, so there is no more cutting of the three turns in the slewing