The yellow light flashes
Output
short-circuit
The 4th green light from the left flashes
Auxiliary supply
fault
The 3rd green light from the left flashes
Internal
overtemperature
The 1st green light from the left flashes
Rectifier fault
1.5.3 Rear Panel
INPUT
Input socket
EXTERNAL BATT.
OUTPUT
Fan
Dry contact
RS232
Output socket
Input fuse
External battery socket
(Long backup time UPS)
SNMP adaptor
slot/false panel
Fig. 4(a) Rear Panel of 1kVA UPS
Chapter 1 Product Introduction 9
E1-20010915-C-1.0