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82 G9000 Installation and Operation Manual
Note 3
Note 1
Note 2
Code
indication
Status message Meaning Guidance Buzzer
External
relay contact
Failure
lamp
UF401 52S ABNORMAL Error to close the contactor 52S.
CALL SERVICE
ENGINEER
Continuous
sound
Major Lit on
UF402 52S ABNORMAL Error to open the contactor 52S.
CALL SERVICE
ENGINEER
Continuous
sound
Major Lit on
UF420
52L OPERATION
ERROR
Load circuit breaker 52L opened during
inverter operation.
CHECK 52L
Continuous
sound
Major Lit on
UF451 52S ABNORMAL
Contactor 52S failed during load transfer
from inverter to bypass.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor Flicker
UF452 CB3 ABNORMAL Contactor CB3 is not working properly.
CALL SERVICE
ENGINEER
Intermittent
sound
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”