Chapter
5
Troubleshooting
29
large. In this case, to protect the IMM, you need to reduce the load and
properly increase the cooling time.
Motor or hydraulic
pump stuck
Perform any action on the IMM computer to check whether the motor and
hydraulic pump rotate normally. If they do not rotate, it indicates that they get
stuck. In this case, contact the IMM manufacturer.
Fault Code
ERR11
Fault Principle
Motor overload
Fault Cause
Solution
Motor overload
View the rated motor current.
View the value of F1-03 and make it consistent with the rated motor current
on the motor nameplate. If the fault persists, contact the IMM manufacturer.
The motor parameters are F1-01 to F1-05 and F1-15, as listed in the
function code table.
Fault Code
ERR12
Fault Principle
Phase loss on the input side
Fault Cause
Solution
Phase loss on the
input side
1. Peripheral device problem: Check whether the three phases of input
voltage are balanced. If not, eliminate the problem.
Note: When the mains capacity is small and the servo drive is powered on
or off frequently, mains fluctuation is large, causing unbalance of the input
three phases.
Rectifier bridge
problem
Power off the servo drive, and measure the rectifier bridge using the diode
function of the multimeter.
Connect the red probe to the - terminal, and measure R, S, T in turn by
using the black probe. Then, connect the black probe to the + terminal, and
measure R, S, T in turn by using the red probe. If the six measurement
values are all about 0.3 V, it indicates that the rectifier bridge is normal. If the
rectifier bridge is open-circuited, replace the rectifier bridge, power on the
servo drive, and perform trial running again.
Drive board problem
If the fault persists after you perform the preceding operations, contact the
IMM manufacturer.
