Chapter 5
5-2
Troubleshooting
5-1 Measures when Trouble Occurs
5-1-1 Preventive Checks Before Trouble Occurs
This section explains the preventive checks and analysis tools required to determine
the cause of troubles if they occurs.
■ Check the Power Supply Voltage
• Check the voltage to the power supply input terminals.
Main-circuit Power Supply Input Terminals (L1, L2, (L3))
R7D-AP@H: Single-phase 200/230 V AC (170 to 253 V) 50/60 Hz
Using R7D-AP08H with three-phase input: Three-phase 200/230 V AC (170 to 253 V) 50/60 Hz
R7D-AP@L: Single-phase 100/115 V AC (85 to 127 V) 50/60 Hz
Control-circuit Power Supply Input Terminals (L1C, L2C)
R7D-AP@H: Single-phase 200/230 V AC (170 to 253 V) 50/60 Hz
R7D-AP@L: Single-phase 100/115 V AC (85 to 127 V) 50/60 Hz
If the voltage falls outside of this range, there is a risk of malfunction, so make sure that the power
supply is correct.
• Make sure that the voltage of the sequence input power supply (+24 VIN Terminal (pin CN1-13)) is
within the range 23 to 25 VDC. If the voltage falls outside of this range, there is a risk of malfunc-
tion, so make sure that the power supply is correct.
■ Selecting Analysis Tools
● Check Whether an Alarm Has Occurred
• If an alarm has occurred, check the alarm code (A.@@) and perform analysis depending on the
alarm code.
• If an alarm has not occurred, perform analysis depending on the error.
Note Refer to 5-3 Troubleshooting in either case.
● Types of Analysis Tools
• The types of analysis tools are as follows:
Servo Driver Indicators and Parameter Unit
• Perform analysis using the display (7-segment LED) on the front panel of the Servo Driver.
Analysis can also be performed using the R7A-PR02A Parameter Unit’s alarm history display
function. This manual explains analysis using these methods.
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