How these pages work
Each family page lists the common fault codes in a table – code, short meaning, likely causes and first checks – with a link straight to each code. Every code was checked against the manufacturer's own public manual, which is named and linked on the page and stays the reference. Codes we couldn't confirm in a manufacturer document are left out.
Fault code pages
PowerFlex 525 fault codes
The common PowerFlex 525 (and 523) F-codes: meaning, likely causes and first checks, with Rockwell's user manual as the source.
31 common codes · Source: Rockwell publication 520-UM001
PowerFlex 70 fault codes
The common PowerFlex 70 (20A) fault codes: meaning, likely causes and first checks, with Rockwell's user manual as the source.
33 common codes · Source: Rockwell publication 20A-UM001
PowerFlex 4 / 40 fault codes
Every PowerFlex 4 (22A) and PowerFlex 40 (22B) fault code: meaning, likely causes and first checks, with Rockwell's user manuals as the source.
26 codes · Source: Rockwell publications 22A-UM001 and 22B-UM001
PowerFlex 753 fault codes
The common PowerFlex 753 (20F) drive fault codes, shared with the PowerFlex 755: meaning, likely causes and first checks, with Rockwell's programming manual as the source.
35 common codes · Source: Rockwell publication 750-PM001
SINAMICS G120 / S120 fault codes
The common SINAMICS G120 and S120 F- and A-codes: meaning, likely causes and first checks, with Siemens' List Manuals as the source.
36 common codes · Source: Siemens G120 and S120 List Manuals
FR-E700 fault codes
The common FR-E700 E. codes, warnings and alarms: meaning, likely causes and first checks, with Mitsubishi Electric's instruction manuals as the source.
33 common codes · Source: Mitsubishi Electric FR-E700 instruction manuals
FR-E800 fault codes
The common FR-E800 E. codes, warnings and alarms: meaning, likely causes and first checks, with Mitsubishi Electric's Maintenance manual as the source.
38 common codes · Source: Mitsubishi Electric FR-E800 Instruction Manual (Maintenance)
ACS355 fault codes
The common ACS355 fault (F) and alarm (A) codes: meaning, likely causes and first checks, with ABB's user's manual as the source.
34 common codes · Source: ABB ACS355 user's manual 3AUA0000066143
FR-D700 fault codes
The common FR-D700 E. codes, warnings and the fan alarm: meaning, likely causes and first checks, with the manual page for each, from Mitsubishi Electric's instruction manual.
32 common codes · Source: Mitsubishi Electric FR-D700 instruction manual
Safety first: lock out and tag out the equipment before you open a drive or touch its wiring, and follow the manufacturer's procedure. Drive DC bus capacitors stay charged after power is removed: wait the time the manual and the drive's label give; then a qualified person verifies zero voltage with a properly rated meter, checking the meter on a known source before and after. Never bypass a safety circuit or switch off a fault to keep a machine running. Only qualified personnel should work on drives, and any measurement on energized equipment follows your site's live-work and arc-flash rules.
Can't find your code?
Send us the fault code and the catalog number from the nameplate. We check our shelves and our sourcing network for a replacement drive or module and reply with a written quote.
Frequently asked questions
Where do the fault code meanings on these pages come from?
From the manufacturer's own public manual for each family, named and linked on every page. The meanings, causes and checks are written in our own words and kept short; the manual stays the reference.
My fault code isn't listed. What should I do?
Each page covers the codes technicians run into most often. Look the code up in the manufacturer's manual linked on the page, or send us the code and the drive's catalog number and we'll quote a replacement part.