YASKAWA varispeed G7 CIMR-G7B series Instruction Manual page 395

Display Meaning
Inverter's Cooling Fan Fault
An Inverter's cooling fan fault was
FAN detected, and the Inverter-overload
protection was activated based on the
内部风扇
internal electric thermal value.
故障
This fault is detected when L8-32 is
set to 0.
Motor Overheating Alarm
OH3
The Inverter will stop or will continue
电机 过热
to operate according to the setting of
警告
L1-03.
Motor Overheating Fault
OH4
The Inverter will stop according to the
电机 过热
setting of L1-04.
警告 2
Installed Braking Resistor Over-
RH
heating
制动电阻
Braking resistor protection function
过热
set in L8-01 has operated.
Internal Braking Transistor Fault
RR
The braking transistor is not operating
制动晶体
properly.
管故障
Table 7.1 Fault Displays and Processing (Continued)
Probable Causes
The Inverter continued running with
an overload after the cooling fan
stopped.
The motor has overheated.
The motor has overheated.
The deceleration time is too short and
the regenerative energy from the
motor is too large.
• The braking transistor is damaged.
• The Inverter's control circuits are
faulty.
Protective and Diagnostic Functions
Corrective Actions
Replace the cooling fan. (Contact
our sales representative.)
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Check the Motor Rated Current
(E2-01).
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Check the Motor Rated Current
(E2-01).
• Reduce the load, increase the
deceleration time, or reduce the
motor speed.
• Change to a Braking Resistor
Unit.
• Try turning the power supply
off and on.
• Replace the Inverter if the fault
continues to occur.
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