5.3 Fault Detection
90
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
Digital Operator
Display
Fault Name
Details
oH
Heatsink Overheat
The heatsink temperature exceeded the overheat pre-alarm level set to L8-02. The default value
for L8-02 is determined by o2-04 (Unit Model Selection).
Cause
Possible Solution
Surrounding temperature is too high.
• Check the temperature surrounding the regenerative unit. Verify temperature is within
regenerative unit specifications.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the regenerative unit that might be producing excessive heat.
Load is too heavy.
• Measure the output current.
• Decrease the load.
Internal cooling fan is stopped.
• Replace the cooling fan. Refer to page
for details.
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Digital Operator
Display
Fault Name
Details
oH1
Overheat 1
The heatsink temperature exceeded the regenerative unit overheat level. Overheat level is
determined by o2-04 (Unit Model Selection).
Cause
Possible Solution
Surrounding temperature is too high.
• Check the temperature surrounding the regenerative unit.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the regenerative unit that might be producing excessive heat.
Load is too heavy.
• Measure the output current.
• Reduce the load.
Internal cooling fan is stopped.
• Replace the cooling fan. Refer to page
for details.
• After replacing the cooling fan, set parameter o4-03 to 0 to reset the cooling fan maintenance.
Digital Operator
Display
Fault Name
Details
oL2
Overload
The thermal sensor of the regenerative unit triggered the unit overload protection.
Cause
Possible Solution
Load is too heavy.
Reduce the load.
Regenerative unit capacity is too small.
Replace the regenerative unit with a larger model.
The regenerative unit does not operate.
Start regenerative unit operation first, and then start regenerative unit operation.
Digital Operator
Display
Fault Name
Details
oPr
External Digital
Operator Connection
Fault
The external operator has been disconnected from the regenerative unit.
Note:
An oPr fault will occur when all of the following conditions are true:
• Output is interrupted when the operator is disconnected (o2-06 = 1).
• The Run command is assigned to the operator (b1-02 = 0 and LOCAL has been selected).
Cause
Possible Solution
External operator is not properly connected to
the regenerative unit.
• Check the connection between the operator and the regenerative unit.
• Replace the cable if damaged.
• Turn off the input power and disconnect the operator. Reconnect the operator and reapply
regenerative unit input power.
Digital Operator
Display
Fault Name
Details
ov
Overvoltage
Voltage in the DC bus has exceeded the overvoltage detection level.
• 200 V Class: Approximately 410 V
• 400 V Class: Approximately 820 V
Cause
Possible Solution
A momentary power loss occurred.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
for details.
The regenerative load is too large.
Reduce the regenerative load.
Input power voltage is too high.
• Check the voltage.
• Lower input power voltage within the limits listed in the specifications.
Regenerative unit fails to operate properly due
to noise interference.
• Review the list of possible solutions provided for controlling noise.
• Review the section on handling noise interference and check the control circuit lines, main
circuit lines, and ground wiring.
The wiring of the power supply voltage
detection circuits (
) and
the wiring of the main circuit terminals
(R/L1, S/L2, and T/L3) is not correct.
Correct the wiring.
r1/ 11, 1/ 21, t1/ 31
TOEP_C710656_10B_1_0.book 90 ページ ２０１５年１月８日 木曜日 午後８時５５分
