Fanuc alarm 918: DRAM PARITY : (BYTE 6)
system alarm · Fanuc 0i-D
What it means
Parity error detected on byte 6 of the system DRAM while the CNC software was running. One isolated alarm may clear after a power cycle; recurring alarms indicate permanent damage to that memory bank.
Likely causes
- Defective DRAM bank for byte 6
- Marginal DC supply rails
- Main board end-of-life
Need the part urgently?
Send us alarm 918 with your machine details — typical RFQ turnaround is 24–48h.