Delta coc fault code meaning

Series: ME300

A short circuit in phase W is detected before operation

AC motor drive

Meaning:

Possible causes

Source: ME300 Series User Manual (DELTA_IA-MDS_ME300_UM_SC_20250407) P181

Series: MH300-HS, MS300, MX300

Short circuit in phase W detected before operation

AC motor drive

Meaning: A short circuit in phase W was detected during the output wiring check before AC motor drive operation.

Possible causes

• Motor wiring error
• Check whether faulty insulation in the motor wiring causes the output
• Short circuit
• Malfunction due to interference
• The motor cable wiring length is long.
• Increase the capacity of the AC motor drive.
• U / V / W Install a AC reactor on the output side.
• Hardware fault
• coc is caused by a short circuit or ground fault on the output side of the AC motor drive.
• B1 corresponds to U, V, and W; DC- corresponds to U, V, and W
• Corresponds to U, V, and W

Source: MH300 Series (High-speed Models) User Manual (DELTA_IA-MDS_MH300-HS_UM_SC_20241213_v3) P253; MS300 Series User Manual (DELTA_IA-MDS_MS300_UM_TC_20260417_v2) P247; MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P139