5 Troubleshooting
5
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Er.626: Brake released abnormally
Cause
Confirming Methods
Corrective Action
1. The motor brake is
released.
Check whether the motor brake signal is active
and whether the brake switch is damaged.
Perform the wiring again or replace
the motor.
Er.630: Overheat protection of locked-rotor motor
Cause
Confirming Methods
Corrective Action
1. Power output phase
(UVW) loss or incorrect
phase sequence occurs
on servo drive.
Perform motor trial running when there is no load and
check motor wirings.
Connect motor cables
correctly again or replace
them.
2. UVW cable or encoder
cable breaks.
Check wirings.
Connect wirings correctly
again or replace them.
3. Motor rotor is locked
due to mechanical factors.
Check running reference and motor speed (H0B-00)
by using the drive debugging platform of Inovance or
operating panel.
Running reference in the position control mode: H0B-13
(input reference pulse counter)
Running reference in speed control: H0B-01 (speed
reference)
Running reference in torque control: H0B-02 (internal
torque reference)
Check running reference in corresponding mode is not
0 but the motor speed is 0.
Eliminate mechanical
factors.
Er.650: Heatsink overheat
Cause
Confirming Methods
Corrective Action
1. Ambient temperature is
too high.
Measure ambient temperature.
Improve cooling conditions to reduce ambient
temperature.
2. Servo drive is powered
off to reset overload fault.
View the fault records (set H0B-
33 and view H0B-34) and check
whether overload fault (Er.610,
Er.620, Er.630, Er.650, Er.909,
Er.920, Er.922) occurs.
Change fault reset method. After overload
occurs, wait 30s and then perform reset
operation. Increase capacity of servo drive and
servo motor, increase acceleration/deceleration
time, and reduce load.
3. The fan is damaged.
Observe whether the fan rotates
during running.
Replace the servo drive.
4. Installation direction
and clearance of the servo
drive are improper.
Check whether installation of
servo drive is proper.
Install servo drive according to mounting
requirements.
5. The servo drive is faulty. The fault persists after restart 5
minutes after power-off.
Replace the servo drive.
Er.731: Encoder battery failure
Cause
Confirming Methods
Corrective Action
The battery is not connected
during power-off.
Check whether battery is connected
during power-off.
Set H0D-20 = 1 to remove the fault.
The encoder battery voltage is
too low.
Measure the battery voltage.
Replace a new battery with
matching voltage.
Summary of Contents for IS650P Series
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