Mitsubishi Electric 1100A Series Owner Technical Manual page 60

Code
Status
indication
message
(Note 2)
UPS CONTROL CIRCUIT
MF376
ERROR
MF552 DUMMY FAULT
(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 the
cause of alarm must be identified;
(Note 2) Code indication means:
#A+++ --------------------- Alarm
#F+++ --------------------- Failure
#%0++ -------------------- Rectifier circuit failure
#%1++ -------------------- DC circuit failure
#%2++ -------------------- Inverter circuit failure
#%3++ -------------------- Control circuit failure
#%4++ -------------------- Bypass system failure
#%8++ -------------------- Alarm
"#" Bypass Module "U", Power Converter Module "M"
"+" denotes any numeral from 0 to 9
"%" denotes either "A" or "F"
1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
Logic signal abnormal (Supply ON)
Bypass Module send fault simulation signal.
MITSUBISHI ELECTRIC 1100 SERIES UPS
Meaning
Page Number:
6-7
External relay
contact
(Note 1)
Minor
Major