Hitachi L300P Series Service Manual page 20

Trip
Instant power failure
detection
Over heat detection
Gate array(INV domestic
problem)
Input phase failure
detection
IGBT over current
detection (equivalent as
power module)
Thermister(customer's
selection)
Brake error (customer's
selection)
Option board 1 error 0–9
Option boad 2 error 0-9
Power off/ waiting from AC
incoming voltage recovery
contents
If Instant power failure 15ms or more happened, INV
will shut the output. If the instant power failure is longer
than preset allowable time or affordable control supply
voltage time, INV will work as normal power off. This
means INV will re-start with the run command after the
long instant power failure.
If main circuit temp. was exceeded specific level such
as high ambient temp., fan failure, INV will shut the
output.
The temp. is detected at heat sink over 100 Celsius .
If there was any communication error between micro
processor and gate array, or if gate array can't detect
IGBT's turn on/off such as IGBT failure.
If one of incoming 3 phase voltage was missed, INV will
shut the output if the detect function was preset.
The detection delay is about 1 sec.
If instant over current happened between INV and the
connected motor, INV will shut the output.
Under this INV trip, the detected phase is possible to
refer at d105 display.
Even retry function is preset, INV can not retry after this
detection.
If motor over temp. happened by integrated thermistor's
resistor value in the motor, INV will shut the output.
After INV output brake release signal, INV couldn't
detect brake on/off within b124(waiting time for brake
operation. (if b120(brake control switch) was preset
"01 ")
Detection of connected option card 1. For more details,
refer to the instruction manual of the card.
Detection of connected option card 2. For more details,
refer to the instruction manual of the card.
Stand by condition because of low DC bus voltage such
as power off, INV will shut the output.
The detection level is same as under voltage trip.
2- 2
Digital
operator
Remedy, advice
display
Any incoming AC V drop
No contact failure in MCB,Mg?
Any cooling fan failure, disturbance of
the cooling such as dusty fin.
Installation vertical
Ambient temp. high
Any big noise near the INV
Any IGBT failure
Connection of flat cable/ribbon cable
Any missing phase
No contact failure in MCB,Mg?
Short circuit or earth contact (ground
fault) in the motor or the motor cable
Any IGBT failure
Any loose connection on main circuit
such as power board
Check the motor temp.
Any thermistor failure in the motor
Any noise in the thermistor signal
Is the brake working ON/OFF
Preset B124 too short
Brake signal/connection OK
Make sure the connection of the card
-
1
Make sure if the usage is proper
Make sure the connection of the card
-
2
Make sure if the usage is proper
Any incoming AC V drop
No contact failure in MCB,Mg?
Check the DC bus voltage
Perform above adjustment referring to
d102, so that the DC bus voltage does
not exceed the trip level.