Causes And Possible Solutions For A Blank And Unresponsive Digital Operator - YASKAWA A1000 Series Quick Start Manual

5.4 Operator Programming Errors
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Causes and Possible Solutions for a Blank and Unresponsive Digital Operator

Table 5.5 Causes and Possible Solutions for a Blank and Unresponsive Digital Operator
A short circuit between +V, -V, and AC terminals.
Control circuit terminal overload.
The short circuit bar between terminals +1 and +2 in the main circuit has
been removed.
Braking unit terminals P and N are connected in reverse.
Control power circuit failure
Malfunction occurred in the control power circuit.
Digital operator contact failure
204
oPE20
Cause
PG-F3 Setting Error
The encoder signal frequency is too high.
Correct wiring
Check the resistance and wiring for the frequency setting potentiometer, etc.
Check that the current for terminals +V and -V is 20 mA or less.
Attach the short circuit bar.
• Check the Braking unit wiring including cables connected to the Braking
unit and relay terminals.
• Replace the drive.
Charge indicator is lit:
• Replace the digital operator
• Replace the drive control board.
Charge indicator is not lit:
• Check the input power supply voltage
• Replace the drive.
Turn OFF the power, wait for 5 minutes, then turn ON the power again.
Turn OFF the power, remove the digital operator, then replace the digital
operator.
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
Possible Solutions