82 G9000 Installation and Operation Manual
Status message Meaning Guidance Buzzer
UF401 52S ABNORMAL Error to close the contactor 52S.
Major Lit on
UF402 52S ABNORMAL Error to open the contactor 52S.
Major Lit on
UF420
Load circuit breaker 52L opened during
inverter operation.
CHECK 52L
Major Lit on
UF451 52S ABNORMAL
Contactor 52S failed during load transfer
from inverter to bypass.
Minor Flicker
UF452 CB3 ABNORMAL Contactor CB3 is not working properly.
Minor Flicker
(Note 1) 1) "Major" is defined as major failure. Inverter transferred to the static bypass line;
2) "Minor" is defined as a minor failure. UPS continues to operate normally, but cause of alarm
must be identified;
(Note 2) Indicates one of two possible LED illumination patterns - continuously on (lit) or intermittent
(flicker).
(Note 3) Code indication means:
UA+++------------------------ Alarm
UF+++ ------------------------ Failure
U%0++ ----------------------- Rectifier circuit failure
U%1++ ----------------------- DC circuit failure
U%2++ ----------------------- Inverter circuit failure
U%3++ ----------------------- Control circuit failure
U%4++ ----------------------- Bypass system failure
U%8++ ----------------------- Alarm
U%+00 - U%+49 --------- Major failure
U%+50 - U%+99 --------- Minor failure
*) “+” denotes any numeral from 0 to 9
*) “%” denotes either “A” or “F”
