1100A SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-7
MITSUBISHI ELECTRIC 1100 SERIES UPS
Code
indication
(Note 2)
Status
message
Meaning
External relay
contact
(Note 1)
MF376
UPS CONTROL CIRCUIT
ERROR
Logic signal abnormal (Supply ON)
Minor
MF552
DUMMY FAULT
Bypass Module send fault simulation signal.
Major
(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”
