[agering]

Except monitor all the PCBs on pictures do not look like products FANUC. May be Harrison developed this system.

[mbservice]

Hiya just private messaged you the details
Unfortunately you cannot identify the fault without accessing the diagnostics and alarm page
Send me your email and i will send you the procedure

[hdelarosa]

Hiya just private messaged you the details
Unfortunately you cannot identify the fault without accessing the diagnostics and alarm page
Send me your email and i will send you the procedure

I have answered the message, thank you.

[mbservice]

Hiya I assume that the machine is now ok

[hdelarosa]

Hiya I assume that the machine is now ok

Good morning, sorry for the delay.
The machine is stopped, but thanks to the manuals we can check the connections and find the fault. There are damaged cables in very bad condition. We assume this is the problem.
We must repair these cables and test the machine, but for now our staff is working on another machine, when we solve the problem I will comment in the forum.
Thanks for the help mbservice.

[Brad4183]

Hi mbservice. Our alpha 550, with a 21-TB, just started doing the same thing as the original poster. Both axis are giving a servo alarm and the 21-TB lights up a red light alarm in the 2nd spot. I'm not sure how to enter diagnostics and alarms on this. Could you please help me?

[OGEE]

Hello All

New to this and the FANUC GE on Harrison Alpha 400, 1996, need help with SERVO alarm just bought machine not knowing anything about these, thought I could apply the knowledge of FANUC OT etc, I am very wrong, so purchased without manuals.

I don't know if you have to home these like for the Old Colchester CNC 2000 machines, Hardware very similar but software not.

Any advice would be helpful plus manuals, from this thread on the forum there is a method for placing into diagnostics for troubleshooting etc.

Any help and advice very much appreciated.

Many thanks

Ian

[OGEE]

I now have the original manuals and, it is pointing to the I/O or main board, managed to work out the diagnostics.
I am seeing all the contactors closed except K3, this turns the power on for the Servo drives. Traced through the 110V circuit, looks link a serial link into CP3 through the two servos.

I assumed the electrical circuit will complete when, guessing, the Main FANUC control turns them on, I don't have the details for the circuits within the servos.

Tested the solenoid for K3 and that operates fine.

I cleaned out the PCB's for the control and I/O, came up with parity error, I have managed to reset the memory, but now have no parameters and get a screen full of servo messages like 'error detecting servo'.

Only thing I cannot seem to do is get the machine back into manual mode, it is sitting in MDI with errors on the screen

Any advice would be appreciated.