APC SY10K40F User Manual

If the system works in bypass, ensure the presence of AC mains supply input. 

If a problem persists, note UPS model #, serial #, and date purchased before calling APC Customer 

Support (see rear cover).

Min Runtime Restored

The system runtime dropped below 
the configured minimum and has been 
restored. Additional Battery Modules 
were installed, the existing Battery 
Modules were recharged, the load was 
reduced, or the threshold was 
decreased.

No corrective action necessary

Bypass Not Available 
Input Freq/Volt Out Of 
Range

The frequency or voltage is out of 
acceptable range for bypass. This 
message occurs when the UPS is 
online, and indicates that the bypass 
mode may not be available if 
required.

Correct the input voltage to provide 
acceptable voltage or frequency.

UPS In Bypass Due To 
Fault

The UPS has transferred to Bypass 
Mode because a fault has occurred.

Contact APC Customer Support 
(see rear cover). 

UPS In Bypass Due To 
Overload

The load exceeded the system power 
capacity. The UPS has switched to 
Bypass Mode.

Option 1: Decrease the load.
Option 2: If possible, add a power 
module to the system.

UPS In Maintenance 
Bypass

The system is in maintenance bypass: 
Q002 is open and Q003 is closed.

No corrective action necessary.

UPS In Forced Bypass 
State

The system has been forced into 
Maintenance Bypass Operation: Q003 
is closed and/or Manual Bypass 
Switch is activated.

No corrective action necessary.

Static Bypass Switch 
Module Removed

The Static Bypass Switch has been 
removed.

If a static Bypass Switch has not been 
removed, check that it has been prop-
erly inserted.