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1600EP Series Instruction Manual
BUILT-IN UPS FAULT PROTECTION FUNCTIONS (CONT’D)
Protection Item Internal Overheat DC Circuit Overvoltage DC Circuit Overcurrent
LCD Message OVERHEAT DC-OV DC-OC
Cause
Fan failure;
High ambient temperature
Chopper malfunction Inverter/chopper fault
Operation Mode
After Fault
Shutdown – No output
Bypass operation – Chopper and inverter are stopped
Inverter OL – Transfer to bypass
Audible Alarm Yes – Continuous buzzer
Visible Alarm Red Fault LED on
Relay Contact
Alarm
Fault relay closed
Bypass relay closed
Auto-retransfer No
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