Fanuc alarm 915: DRAM PARITY : (BYTE 3)
system alarm · Fanuc 0i-D
What it means
Parity error detected on byte 3 of the system DRAM during execution. A single occurrence after a power disturbance can be noise-related, but repeat alarms at power-up or within minutes of booting point to a genuinely defective memory bank that requires board repair or exchange.
Likely causes
- Defective DRAM bank for byte 3
- Noise or inadequate cabinet earthing
- Aging main board
Need the part urgently?
Send us alarm 915 with your machine details — typical RFQ turnaround is 24–48h.