Hi, Guys
I have some problems with the same boom lift.
I need service & Schematics for this type.
Could you help me , please.
Thx

Hi,
My customer buyed an Amz51e ,but missing the dc motor of hyd. power unit. I'd like to ask a type or part number for this 48V motor.
Thanks in advance!

Just wanted to post my findings for anyone else who might have the same problem in the future.

The main cause was that the delivery wires in the drive motor failed and shorted to the motor casing. Got that rebuilt and now almost everything works.

The indicator light was on due to failed wire on the til sensor on the machine. I changed that over and no more light.

The dead man switch in the foot pedal of the man basket was also failed. Got a new one on amazon and that now works.

Only have one problem left. All the switches work except for the "boom down" control from the man basket. The switch on the machine itself works fine.

When I hit the boom down, the motor activates and seems to load the hydraulics but the basket doesn't move down.

Any idea's? I am going to troubleshoot further today.

Hmm yes I did find those error code messages and the controller. I have replaced the board, but unfortunately that did not solve any problems.

I manually tested the contractors and they are working fine.

It's unfortunate because the circuit in the manual that shows the bypass circuit does not exsist on my controller. I have a 4 post mosfet90 controller, all the manuals show the bypass contractor on the 5th post manuals on the post I don't have. Very frustrating.

One thing I noticed in the man basket the 5 degree tilt indicator on the control board is illuminated. I'm assuming this is a indicator that the machine is not level, but it is.... could this indicate a faulty level sensor and be causing my problems in anyone's experience?

Shouldn't the machine operate slowly even when it senses that it is tilted?

Any help aprecisted!

hi JFrank7
on that MOS90 3 flashes means the following:
Traction controller: Bypass contactor welded - recycle through neutral to clear.
Contactor coil short circuit - recycle the key switch to clear.

Pump Controller: Short circuit across Mosfets, or motor open circuit.

there are public posted manuals for these on flight systems website (fsip.biz) if you want more info on it. Just go to their support tab and its listed under technical manuals.

I am having the Same problem. 3 flashes on the set on mos90 controller. All contractors and motors are working,. Board apears to have had work done on it, but is the original unit. I am was inclined to replace the board until I read this thread. Was there any update on the fix for the problem?

Hi, I sent you a message.

Hi Darius if you see this message I would appreciate you to contact me, my email is [email address removed] thanking you kindly, I cordially greet you Juan Krecz.

Hi, I have an AMZ51E grove team with problems in the braking system. I do not have the plans of the machine. You would be so kind to send them to me. If you happen to spend some time, I would agree to give you back. I appreciate your inconvenience and I cordially greet you.

Hello,

Today I replaced the disc SEVCON 666/10461 a new one.
Currently linkage - the main module displays the error - flashes 3 times.
What does it mean? What could be bad?

Please reply.

Hello,
I managed to find a fault in the main module Sevconu - one track was damaged and the rectifying diode.
After repair the lift began to move, but incorrectly work directions. The lift only moves back, even trying to go forward.
I checked the control voltage at the terminals A2 and A4. A2 voltage value is correct - is approx. 7,6V at stopping the lift. A4 is the problem - after a reset voltage is approx. 17V after a while falls to 0V. According to the control table should be 7.5V at a standstill.
I ordered a new plate 666/10461. Write what will happen after the conversion.

ok that voltage drop looks fairly normal, not too excessive.

all this work you are doing on the circuit boards with the capacitors and integerated circuits? that is out of the ordinary for a normal field tech, at least in my experience. we generally find a faulty board and just replace it, where you are you may not have that luxury though but without having the manual in front of me i am going to be very limited on any further useful help.
If i happen to think of anything else i will come back and see if it will help though.

As long as your motor's, cables, contactors, batteries, joystick controller and fuses and relays are checking ok, then i'm at a loss as to what else it could be.

Hello,
I followed your comments:
1) I checked the voltage under load lifting cylinder largest - the voltage drops from 49.7 to 47,5V - I think this is the correct result
2) I checked all fuses - all are ok

I can check what's next?

Before the moment I finished the renovation of the electronics board 666/10461.
Replaced integrated circuits and capacitors. Simulate signals in accordance with the previously attached documentation. In my opinion, behaves correctly. Tomorrow see if in conjunction with the main module - 631/40164.
If it is not right, I want to bring to the workshop two plates and simulate the whole work in the workshop. The biggest problem is that I have to simulate the drive and generator.

ok dariusz,
that schematic is larger but still does not show the other circuit path's above... i was thinking more of getting a complete view of the whole schematic. But thats ok...
i did some research on the sevcon error codes given from the LED indicator on the controller and it does say on all the controller diagnostic grams i looked at the when LED is on solid green, the controller is powered on, this is normal. If the led goes out during operation with no flashing there is a fault in the controller.

Now i wouldn't go out and order a new controller just yet, another component failure that supplies power to the controller during operation might be failing and just triggering that condition. This is why i asked to check all the fuses in the controller power circuit path.

As for the location of the fuses i cannot say for sure as i have not worked on this particular model before but on most other models they are generally located in the main control box on the ground side control box. There may even be an auxillary control box mounted near the main box that might contain some contactors and relays and possibly some fuses.
I've worked on an older AMZ40 for one of my customers for a while now, it isn't electric but it has a couple of boxes mounted on the tractor unit that contain all the electronics related to the machine operation, circuit boards, fuses, relays, circuit breakers etc etc.

As you can see in that schematic it does have fuses, there are control fuses for the control circuits and also main power buss fuses for the traction and pump power circuits.
The power fuses will be located on the contactor panel buss bars and the control circuit fuses will be located in the area where the controller is located. There might even be a fuse block located in the contactor panel area. I have seen many variations where fuses are on a fuse panel and in some cases they are just an inline fuse in the harness.
You'll just have to use the schematic , the wire numbers or colors and identify which fuse your looking at when you find them that way. If you dont have the complete service manual that is.

Where are the fuses responsible for control? I checked all the fuses that I could find, but maybe some missed?

Already checked SEVCON errors on the module.
Looks like this:
Control activated, lights up the LED continuously.
If you attempt to drive off. Do not blink at all.
Is off until reset control.

upload a larger scheme
tel-kom.eu/predkosc_amz_2.png