lasts for a period of time
(F1-11)
2. The output current is less
than the water shortage
detection value (F1-10) and
lasts for a period of time
(F1-11)
3. Detection time is too short
6.2 Fault Detection
Table 6.2 Fault Displays, Causes, and Possible Solution
Output power cable is damaged
Check and replace output power
cable
oVA,
oVd,
oVC
oVAH
oVdH
ovCH
Overvoltage (Acceleration,
Deceleration and Constant
Speed)
The main circuit DC voltage
exceeded the overvoltage
detection level
200V class: 410V
400 V class: 820 V
1. Regenerative energy is
flowing from the motor into the
drive because the deceleration
time is too short
2. The motor overshoot the
speed reference because the
acceleration time is too short
3. Excessive braking load
4. Surge voltage entering from
the drive input power
5. Motor short-circuited
Ground fault current charges
the drive main circuit capacitor.
6. Improper parameter settings
for Speed Search (including
Speed Search after a fault
restart and after a momentary
power loss)
7. Drive input voltage is too
high
8. The braking transistor or
braking resistor are wired
incorrectly
9. PG cable is disconnected
1. Increase the deceleration time
settings (C1-01, C1-03, C1-05, C1-07)
»Install a braking unit or a dynamic
braking resistor
»Set P3-03 (Stall Prevention during
Deceleration) to 1 (Enabled)(default is
1)
2. Confirm if overvoltage alarm oVA
or oVC was triggered during sudden
drive acceleration.
»Increase the acceleration time
»Use S-curve deceleration and
acceleration times and increase the
value set to C2-01 ( S-curve at
acceleration end )
3. Install a braking unit or a braking
resistor
4. Install a DC reactor
»Thyristor convertor and phase
advancing capacitor using the same
input power supply might cause a
voltage surge
5. Check the motor power cable, relay
terminals and motor terminal box
To Next Page
Loading...
