Alarm
Code
Name
Cause
Corrective Action
E26
Motor control error
Set value for the safety valve is too
high.
Adjust the setting of the safety valve to the
operating pr 0.5 MPa.
Controller failure
Replace controller.
E29
Motor start error
Excessive load torque at starting due
to increased oil viscosity
Replace hydraulic oil.
Excessive load torque at starting due
to damage to the motor pump
bearing
Replace the motor or motor pump.
Motor pump lock
See E32.
E30
Pressure sensor
system error
Pressure sensor connector is not
connected
Connect the connector.
Damaged pressure sensor harness
Replace pressure sensor harness.
Pressure sensor failure
Replace pressure sensor.
Controller failure
Replace controller.
E32
Motor lock error
Pump seized
Replace motor pump.
Locked due to contamination
Restart.
Replace hydraulic oil.
Clean the suction strainer.
Bearing seized
Replace motor pump.
E40
Motor thermistor
disconnected/short
circuited
Motor thermistor wiring is
disconnected or short circuited
Replace motor pump.
Controller failure
Replace controller.
E41
Abnormal rise in
motor temperature
The motor cooling fan has stopped.
Replace the cooling fan.
Replace the fan harness.
Replace controller.
The radiator is clogged.
Clean or replace the radiator.
The motor rotation speed has risen.
Check if the amount of oil leaking from the
circuit at the main machine has increased.
Check, and re-set, the safety valve.
Replace motor pump.
The ambient temperature is too high.
Bring the ambient temperature to within the
stipulation, by changing the installation location,
cooling with a fan, etc.
Controller failure
Replace controller.
E42
Radiating fin
thermistor
disconnection
Controller failure
Replace controller.
