Applicable Systems
VF-AS1
Symptoms
The VF-AS1 reports a parameter write protection fault. An attempt was made to modify parameters while write protection is active.
Possible Causes
- Write protection is enabled preventing parameter modification
- Password protection is active and the wrong password was entered
- Hardware write-protect switch is in the locked position
Troubleshooting Steps
- Step 1: Check the write protection setting and disable it via the keypad
Write protection is disabled - Step 2: Enter the correct password if password protection is active
Password is accepted and protection is cleared - Step 3: Check the hardware write-protect switch position if equipped
Switch is in the write-enabled position
How to Reset
To reset: Disable write protection, then modify and save parameters.
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Source: Toshiba VF-AS1 Inverter Manual, Toshiba Mitsubishi-Electric Industrial Systems
Category: PLC & VFD
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