Chapter 14 Fault CodesMS300 
545 
 
  Fault Codes 
 
Summary of Fault Codes 
cc hardware failure (Hd0) 
Over-current during acceleration (ocA) 
Over-current during deceleration (ocd) 
Over-current during steady operation (ocn) 
IGBT short circuit between upper bridge 
and lower bridge (occ) 
Over-current at stop (ocS) 
Over-voltage during acceleration (ovA) 
Over-voltage during deceleration (ovd) 
Over-voltage at constant speed (ovn) 
Over-voltage at stop (ovS)   
Low-voltage during acceleration (LvA) 
Low-voltage during deceleration (Lvd) 
Password is locked (Pcod) 
Low-voltage at constant speed (Lvn) 
Low-voltage at stop (LvS) 
Illegal data address (CE2) 
Phase loss protection (OrP) 
Data is written to read-only address (CE4) 
Internal key parts overheating (oH2) 
Modbus transmission time-out (CE10) 
IGBT temperature detection failure (tH1o) 
Y-connection / Δ-connection switch fault 
(ydc) 
Capacitor hardware error (tH2o) 
Deceleration energy backup fault (dEb) 
Electronic thermal relay 1 protection (EoL1) 
Hardware error of PG card (PGF5) 
Electric thermal relay 2 protection (EoL2) 
Motor overheating (oH3) PTC / PT100 
U-phase over-current before run (Aoc) 
V-phase over-current before run (boc) 
W-phase over-current before run (coc) 
Output phase loss U phase (OPHL) 
Output phase loss V phase (OPHL) 
Output phase loss W phase (OPHL)