5.4 Alarm Detection
96
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
Cause
Possible Solutions
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the multi-function input value.
Refer to
Stopping the Regenerative Unit for Faults in Peripheral Devices on page 71
for
details.
Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for external fault
detection (H1-
=24 to 27, 2C to 2F).
• Reconnect the signal line. Refer to
Stopping the Regenerative Unit for Faults in Peripheral
for details.
Multi-function contact inputs are set
incorrectly.
• Check if the unused terminals have been set for H1-
= 24 to 27, 2C to 2F (External Fault).
• Change the terminal settings. Refer to
Stopping the Regenerative Unit for Faults in Peripheral
for details.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
Fan
Internal Circulation
Fan Fault
The internal circulation fan in the regenerative unit is faulty.
YES
Cause
Possible Solutions
An internal circulation fan is faulty.
Cycle the power supply and see if the fault occurs again.
Check the operation of the internal circulation fans.
Check U4-03 (Cooling Fan Operation Time) and U4-04 (Cooling Fan Maintenance Display).
If the life of the internal circulation fans has expired or if a fan is faulty, perform fan replacement
according to instructions in this manual.
An internal circulation fan or MC power supply
is faulty.
Cycle the power supply and see if the fault occurs again.
If the fault occurs repeatedly, replace the board or the regenerative unit. For information on board
replacement, consult with your Yaskawa representative or the nearest Yaskawa sales office.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
Fdv
Power Supply
Frequency Fault
The input power supply frequency exceeded the allowable frequency
fluctuation.
YES
Cause
Possible Solutions
A momentary power loss occurred.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
An input power supply wiring terminal is loose.
The fluctuation in the voltage of the input
power supply is too large.
The AC power supply fuse is open.
• A transistor inside the regenerative unit was destroyed.
• The input wiring or drive output has ground faulted or short circuited.
Contact your Yaskawa representative or the nearest Yaskawa sales office.
The phase rotation direction has changed in the
input power supply.
Correct the wiring.
The detected power supply frequency exceeded
the allowable value.
Improve the power supply.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
HCA
Current Alarm
Regenerative unit current exceeded overcurrent warning level (150% of the
rated current).
YES
Cause
Possible Solutions
Load is too heavy.
Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the
regenerative unit.
Digital Operator
Display
Minor Fault Name
Detail
Alarm Output
(H2-
= 10)
LT-1
Cooling Fan
Maintenance Time
The cooling fan has reached its expected maintenance period and may need to
be replaced.
Note:
An alarm output (H2-
= 10) will only be triggered if both (H2-
=
2F and H2-
= 10) are set.
YES
Cause
Possible Solutions
The cooling fan has reached 90% of its
expected performance life.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
TOEP_C710656_10B_1_0.book 96 ページ ２０１５年１月８日 木曜日 午後８時５５分
