11.2
42B
Alarm Causes and Corrective Actions
Alarm
Code
Name
Cause
Corrective Action
E10
Output device error
Motor control error
Adjust the setting of the safety valve to the
operating pr 0.5 MPa.
If there is a possibility of large hydraulic load
due to deterioration of the oil, change the oil.
Adjust the lowest rotational speed.
Controller failure
Replace controller.
Motor coil short circuit
Short circuit of the device output
Replace the pump or motor pump.
Cooling fan system failure
Replace the cooling fan.
Motor pump lock
See E32.
E11
Overcurrent
Motor control error
Same as E10
Controller failure
Replace controller.
Motor coil short circuit
Short circuit of the device output
Replace the pump or motor pump.
E15
Insufficient voltage
Controller failure
Replace controller.
Low power supply voltage
Input a voltage within the stipulation.
E16
Overvoltage
Controller failure
Replace controller.
High power supply voltage
Input a voltage within the stipulation.
E17
Motor electronic
thermal relay error
The load torque is larger than usual
due to wear of the pump, for
example.
Replace the motor or motor pump.
The motor magnets have
demagnetized and the current has
increased.
Replace the pump or motor pump.
E21
Motor wiring
disconnection
Motor wiring disconnection,
connection fault
Replace the pump or motor pump.
Output device failure
Replace controller.
Connector fault at controller
E22
Inverter board internal
error
Controller failure
Replace controller.
E23
Current sensor error
Motor wiring disconnection,
connection fault
Replace the pump or motor pump.
Output device failure
Replace controller.
Connector fault at controller
E24
Open phase in power
supply
Disconnection of the power supply
cable
Check the power supply wiring. If there is a
disconnection in the wiring, replace it.
Deterioration of the power supply
environment
Improve the power supply environment.
Power supply cable internal harness
connection fault, disconnection
Replace controller.
E25
Voltage sensor error
Controller failure
Replace controller.
