YASKAWA VS-626M5 Instruction Manual download pdf (Page 56)

2-６

Chapter 2 SERVO

0712

□ READY OFF ERROR

The V-READY is still off (diagnosis “0007 bit2=1”) even though the P-READY

(diagnosis “0007 PRD”) is on.

Turn on the reset key to release the alarm after eliminating the cause.

If the parameter “1815 VOC = 1,” the alarm is cancelled.

Items Cause of Trouble How to Verify Measures

AC 220V power

supply failure or

undervoltage to

the servo unit.

Make sure that the magnet contactor

and the relay for the servo unit are

ON, and then measure the voltages

between R, S, and T and between r

and t of the servo unit.

Eliminate a root

cause including

connection error,

etc.

Power supply

failure or

undervoltage to

the coils of the

magnet contactor

and relay for the

servo unit.

Make sure that the magnet contactor

and the relay for the servo unit are not

ON, and then check the coil voltage.

Eliminate a root

cause including

connection error,

etc.

Inferior magnet

contactor and

relay

Replace the

magnet contactor

and the relay

Problems on the

sequences

Check the sequences

Eliminate a root

cause.

The servo unit is

inferior.

Replace the servo

unit.

The EPS3 board

is inferior.

Replace the EPS3

board.

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YASKAWA VS-626M5 Instruction Manual Page 56

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