Toshiba G2020 Series Installation And Operation Manual page 74

Code
LCD Screen Status
indication
Message
(Note 3)
UF401 52S ABNORMAL
UF402 52S ABNORMAL
52L OPERATION
UF420
ERROR
UF451 52S ABNORMAL
UF452 CB3 ABNORMAL
(Note 1) 1) "Major" is defined as a major failure. Load transferred from the inverter circuit to the static bypass line;
2) "Minor" is defined as a minor failure. UPS continues to operate normally, but cause of alarm is identified;
(Note 2) Indicates one of two possible LED illumination patterns – continuously on (Cont. On) or intermittent (Blinking).
(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"
66
Meaning
Error to close the contactor 52S.
Error to open the contactor 52S.
Load circuit breaker 52L opened
during inverter operation.
Contactor 52S failed during load
transfer from inverter to bypass.
Contactor CB3 is not working
properly.
G2020 Series UPS Installation and Operation Manual – 94861-004
Recommended
Buzzer
Action
CALL SERVICE Continuous
ENGINEER sound
CALL SERVICE Continuous
ENGINEER sound
Continuous
CHECK 52L
sound
CALL SERVICE Intermittent
ENGINEER sound
CALL SERVICE Intermittent
ENGINEER sound
External relay Failure
contact lamp
(Note 1) (Note 2)
Major Cont. On
Major Cont. On
Major Cont. On
Minor Blinking
Minor Blinking