Upon starting the forklift error code -30 is displayed and the it does not go forward or backward - Clark forklift model TMG20

FAULT NAME: VMN HIGH
- FAULT DESCRIPTION: wrong voltage on power motor outputs, failure in the power section or in the mosfet driver circuit or in the motor. https://www.forkliftaction.com/forum/trouble-code-31.aspx?t=14834

https://errors-codes.jimdofree.com/clark/

Error code 42 on a Clark forklift model FCG 32 indicates a problem with the fuel system. Specifically, it means that there is a problem with the fuel injection system, such as a clogged fuel filter, damaged fuel injector, or fuel pump failure. This can result in a lean or rich fuel mixture, causing the engine to run poorly or not at all. It is recommended to have a certified mechanic inspect and repair the fuel system to ensure safe operation of the forklift.

Error code -51 on a Clark forklift typically indicates a problem with the hydraulic system. This could be caused by a variety of issues, such as a faulty hydraulic pump, a leak in the hydraulic system, or a problem with one of the hydraulic valves.
To troubleshoot this issue, you will need to first check the hydraulic fluid level and make sure it is at the correct level. If the fluid level is low, refill it to the proper level and see if the error code clears.
If the fluid level is fine, you may need to perform further diagnostic tests to identify the root cause of the problem. This could involve checking the hydraulic pump and valves for any visible signs of damage or malfunction, as well as testing the system for leaks.
If you are not comfortable performing these tasks, it may be best to contact a professional mechanic or the manufacturer for assistance. They will be able to diagnose the problem and recommend the appropriate repairs.

Don't worry I'm sure you will get the solution of your problem, just check the link I attached CLARK FORKLIFT NPR 17 NPR 20 SERVICE REPAIR MANUAL

clark forklifts have a safety device on the brake pedal hydraulics that prevents movement when lifting the forks
check the operation of that safety device as it may be jammed in the neutral position

An abnormal shift lever signal was detected.

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Hi,
I have clark forklift not starting
error: canbus error 1

sounds like the #1 rectifier is shorted or the insulator gasket is shorted through -also the 1A contactor may be welded shut -usually caused by a weak battery or running a discharged battery too long. -Troy from A-Lift Services

I got the same problem and same model, what's going on with Clark forklift, I look for the new transmission all over internet but can't find any. if any body know what wrong please tell us what to do. thanks a lot. TMV