Chapter 6 Fault Code InformationVFD-S Series

Fault

Fault Descriptions

 

Corrective Actions

 

Name

 

 

 

 

 

 

 

 

1. Short-circuit at motor output: Check for

 

 

 

 

possible poor insulation at the output line.

 

 

Over-current during

2. Sudden increase in motor loading: Check for

 

 

 

possible motor stall.

 

 

constant speed operation

 

 

 

3. AC motor drive output power is too small:

 

 

 

 

 

 

 

Replace the AC motor drive with the next

 

 

 

 

higher power model.

 

 

 

 

 

 

 

1. When multi-function input terminals (MI1-MI6)

 

 

External Fault

 

are set to external fault, the AC motor drive

 

 

 

stops output U, V and W.

 

 

 

2. Give RESET command after fault has been

 

 

 

 

cleared.

 

 

Internal EEPROM can not be

Return to the factory.

 

 

programmed.

 

 

 

 

 

 

Internal EEPROM can not be

Return to the factory.

 

 

programmed.

 

 

 

 

 

 

 

1.

Switch off power supply.

 

 

Drive’s internal circuitry

2.

Check whether the input voltage falls within the

 

 

abnormal.

 

rated AC drive input voltage. Switch on the AC

 

 

 

 

drive.

 

 

OH error

 

 

 

 

OV error

 

 

 

 

LV error

Return to the factory.

 

 

Current detection error

 

 

DC BUS detection error

 

 

 

 

 

 

 

 

 

Current detection error

 

 

 

 

 

When (one of) the output terminal(s) is grounded,

 

 

 

short circuit current is more than 50% of AC motor

 

 

 

drive rated current, the AC motor drive power

 

 

 

module may be damaged.

 

 

 

NOTE: The short circuit protection is provided

 

 

Ground fault

for AC motor drive protection, not for

 

 

 

protection of the user.

 

 

 

1. Check whether the IGBT power module is

 

 

 

 

damaged.

 

 

 

2. Check for possible poor insulation at the

 

 

 

 

output line.

 

 

 

1.

When the external input terminal (B.B) is

 

 

External Base Block.

 

active, the AC motor drive output will be

 

 

 

turned off.

 

 

(Refer to Pr. 8-06)

 

 

 

2.

Deactivate the external input terminal (B.B) to

 

 

 

 

 

 

 

operate the AC motor drive again.

 

 

 

1. Check if the motor is suitable for operation by

 

 

Auto accel/decel failure

 

AC motor drive.

 

 

2.

Check if the regenerative energy is too large.

 

 

 

 

 

 

3.

Load may have changed suddenly.

 

Revision August 2006, SE08, SW V2.61

6-3

Page 138
Image 138
Delta Electronics 230V Series manual Fault Descriptions Corrective Actions Name, Constant speed operation, External Fault