221 The uninterruptible power supply is receiving input power that might be unstable in low or high voltage conditions.

Action

Ask the customer to check the site power to the 2145 UPS-1U providing power to this 2145. Check the connection, voltage, and frequency. If the input power is sufficient, exchange the FRUs for new FRUs. (See "Possible Cause-FRUs or other.")

Possible Cause-FRUs or other:

• 2145 UPS-1U input power cable (10%)
• 2145 UPS-1U assembly (10%)

Other:

• AC input power (80%)