8-1
8-1 Error Processing
Troubleshooting
8
8-1 Error Processing
Preliminary Checks When a Problem Occurs
This section explains the preliminary checks and analytical tools required to determine the cause of
a problem.
Checking the Power Supply Voltage
Check the voltage at the power supply input terminals.
Main Circuit Power Supply Input Terminals (L1, L3)
R88D-GN
@
L-ML2 (50 W to 400 W): Single-phase, 100 to 115 VAC (85 to 127 V), 50/60 Hz
R88D-GN
@
H-ML2 (100 W to 1.5 kW): Single-phase, 200 to 240 VAC (170 to 264 V), 50/60 Hz
Main Circuit Power Supply Input Terminals (L1, L2, L3)
R88D-GN
@
H-ML2 (750 W to 7.5 kW): Three-phase, 200 to 240 VAC (170 to 264 V), 50/60 Hz
Control Circuit Power Supply Input Terminals (L1C, L2C)
R88D-GN
@
L-ML2: Single-phase, 100 to 115 VAC (85 to 127 V), 50/60 Hz
R88D-GN
@
H-ML2: Single-phase, 200 to 240 VAC (170 to 264 V), 50/60 Hz
If the voltage is outside of this range, there is a risk of operation failure, so be sure that the power
supply is correct.
Check the voltage of the sequence input power supply. (+24 VIN Terminal (CN1 pin 1))
Within the range of 11 to 25 VDC
If the voltage is outside of this range, there is a risk of operation failure, so be sure that the power
supply is correct.
Checking Whether an Alarm Has Occurred
Evaluate the problem using the 7-segment LED display on the front panel.
You can also evaluate the problem by using the R88A-PR02G Parameter Unit.
CX-Drive can also be used for the display. The operation status can also be monitored.
Check the load status, including data trace.
When an alarm has occurred:
Check the alarm code that is displayed (
@@
) and evaluate the problem based on the alarm that is
indicated.
When an alarm has not occurred:
Make an analysis according to the problem.