Fanuc alarm 912: DRAM PARITY : (BYTE 0)
system alarm · Fanuc 0i-D
What it means
Parity error in DRAM used by system software execution (also 913-919 bytes 1-7)
Likely causes
- DRAM module failure
- main board DRAM controller fault
- seated option/RAM board loose
Triage note: Reseat boards once; DRAM is soldered/on-module on 0i-D/0i-F so recurring 912 means main board exchange
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A20B-8200-0740
Main CPU Board (0i-D, DRAM onboard) · Primary suspect
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A02B-0303-B802
Main CPU Board (30i/31i-B) · Common cause
Need the part urgently?
Send us alarm 912 with your machine details — typical RFQ turnaround is 24–48h.