maybe this is a malfunction, ECO SMART DISPLAY, or there is no communication between ECO SMART DISPLAY and other units.
node 16 is ECO SMART DISPLAY.

Alarm 103 on the ZAPI controller typically indicates a communication issue between the controller and the machine's components. Check the wiring connections, inspect for any physical damage, and consider resetting the controller. If the problem persists, contacting a certified technician for diagnosis and repair is advisable. https://gbwaapps.com

NODE 16 IS THE DISPLAY.

If you can find a manual for the zapi smart display it should have the code.

This Hyundai model uses the zapi dual system https://manualzz.com/download/947304

Firstly, when we talk about truck controlled by zapi controller, if you don't have manual of this truck you must have a "programming consol zapi" to connect it directly with the controller to know the fault from the controller

how many controllers does this unit have and make and model would help

Hello
Did you find the fault.
I have the same code. All functions ok.

Thanks swoop223 for your caring
The machine is a forklift that use ZAPI controller DualAC2 Power. It move slow and lift slow, and the screen show upper line alarm 103 and under line node 16.
Yes, i've looked Zapi manual that i found on internet and did not find the alarm. that why i look forward to our forum
thanks

well if you do not provide a model and serial number of machine or model number of zapi controller it will be hard to help.

all zapi manuals i've looked at do not have Alarm 103 and we cannot know what node 16 is , that is assigned by truck mfg when they design truck.
having a service manual for this truck will be necessary to identify node 16 and have the correct model of zapi controller to get correct meaning of Alarm 103.