A181 alarm in WEG CFW900 Drive indicates an Invalid Clock Value. This means the keypad’s Real Time Clock has lost its time setting, usually due to a dead internal battery.
Cause:
Clock with wrong time.
- Battery low, defective, or not installed.
Note: Set the date and time in C11.1.2.
Remedy:
Configure date and time parameter C11.1.2. Replace the internal battery if discharged or missing.
