Here are the screenshots, should the display fail
FM Gru 1589 Relay Explanation
Rundown of relay to contactor logic
Contactor 34K1 controls valve bank coils.
Y1 Mast down
Y2 Mast up
Y3 Jib up
Y4 Jib down
Relay bank
36K1-5 relays
36K1 Mast down (34K1-Y1)
36K2 Mast up (34K1-Y2)
36K3 Jib up (34K1-Y3)
36K4 Jib down (34K1-Y4)
36K5 Control relay (supply)
FM Gru 1589 will not raise the jib in erection mode
Tried to erect 1589 and the jib would not raise. Checked hydraulic pump, and it was building pressure, but the coil to open the valve bank was not being activated.
Contactor was switching to open, but the control relay for the valve was bad.
Light would turn on the face of the relay, but would not actually switch. The orange screw could be turned to manually make the switch and the jib would go up. Replace relay.
GR Plug – MDT 389
The GR plug is for the auto greaser option. The auto greaser does not have GR marked on the plug. If the GR plug is not plugged in the slew ring will not be automatically lubricated.
FM GRU 1589 Limits Hoist and Trolley
This is only for the Upper and Lower hoist limits and the Inner and Outer Trolley Limits
—– Limit calibration —–
With machine in work,
press the radio control buttons A and D simultaneously for at least 5s until the radio control buzzer sounds.
At this point the machine goes into calibration mode and the radio control screen changes showing the current maximum and minimum limits.
It is possible to move the lifting and trolley axes WITHOUT LIMITATION to bring them manually to the maximum and minimum positions.
Once the limit position has been reached, by keeping the corresponding button pressed for at least 3s, the quota (minimum or maximum) will be fixed to the current position of the axis
and to the value displayed by radio control.
The keys are assigned as follows:
– key A for minimum lifting limit (LOWER LIMIT CLOSEST TO GROUD)
– key B for maximum lifting limit (UPPER LIMIT CLOSEST TO JIB)
– C key for minimum cart limit (INNER TROLLEY LIMIT)
– D key for maximum cart limit (OUTER TROLLEY LIMIT)
The LEDs positioned above the keys indicate whether the limits calibration has been carried out (LED on steadily) or not (LED off), respectively at the minimum and maximum lifting and trolley levels.
——————-
Luffing Winch Stop Monitoring Fault code.
While operating the MR 329 The operator lost boom down function. Fault Code 2074.25501 was listed in messages. The Potain Fault code app had no definition of the fault code. I instructed the operator to turn off the crane and restart it. When the crane was running again the code was cleared and the crane regained boom function.
Attached is the Code and the code description from Potain.
Crane Topsite Shunt Code
Shunt code for Topsite shunt when activated is 8528
This code can be any code you choose, in an attempt to standardize the shunt code please make it 8528 at the time of setup.
Currently the shunt code for the MDT389 SN: 627012 is 1025
MDT 219 loses functions – bad encoders
Operator stated crane lost all functions. Found the LMI, and drives were all on with no codes. Looked in the CAN network of the LMI and saw the slew encoder wasn’t pairing,
this was confirmed by a blinking green and red light on the encoders.
There was evidence of corrosion on the encoders,
and it was decided to replace the encoder assembly. Once it was replaced, we cleared the old encoder addresses and paired the new encoder and the crane regained functionality.
Moments later the crane stopped working again. The operator said all of his LMI information wasn’t present (hook position, weight on hook, and trolley location)
the drives were all operational but there were multiple faults codes being thrown. CAN Saturation, CAN Sense codes, and various codes relating to trolley, hoist and load.
The CCL plug was disconnected to test if the load pin, hoist or trolley were faulting the can network. When the crane was restarted the fault codes stopped happening, and the slew function was regained. We also put the crane into fitting mode, this allowed us to test functions without the use of the CAN network. We also saw that the encoders for the hoist, Tolley and load pin were being seen then shutting down then being seen on the CAN open network screen of the LMI.
It was decided to remove the CAN H and CAN L from the CAN Sense connection one at a time from each encoder by connecting the CAN H to CAN H and CAN L to CAN L leads that come in and leave the encoder (taking the tested encoder out of the circuit) until functionality was regained and a loss of an encoder was recognized on the CAN Open Network.
The hoist encoder was the first tested, and when we removed the hoist encoder from the network, the CAN network connected to the trolley and load pin and showed the hoist was offline, the LMI regained load information, and trolley position, and the hoist encoder wasn’t being recognized.
The Hoist encoder was replaced, the new encoder was paired, 
and the hoist min height was re-taught. The crane regained functions.
AMCS Password
Minutes Hour and Minutes+Hour
If it is 10:30 in the morning, it would be:
301040
Popping from tower head area MDT389
There are 4 pins that connect the tower head to the turntable. Near these pins there are 4 bolts that apply torsional pressure against the pins. The Operator Manual says to tighten the bolts then back them off 1/4 turn and set the jam nut. Blake Smith from Potain recommends these bolt be tightened and not backed off. Throughout operation of the crane occasionally re-tighten these bolts. The pin connections will pop as has they “seat in” during operation and will eventually quiet. This is a common issue with new 389 cranes.
