Mitsubishi Electric 1100B Series Owner Technical Manual page 61

Code
Status
indication
message
(Note 2)
UPS CONTROL CIRCUIT
MF320
ERROR
UPS CONTROL CIRCUIT
MF376
ERROR
MF552 DUMMY FAULT
(Note 1) 1) "Major" is defined as a major failure. The load is transferred from the inverter circuit to
the static bypass line
2) "Minor" is defined as a minor failure. The 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"
1100B SERIES UPS
OWNERS / TECHNICAL MANUAL
Cable disconnection in the parallel interface board
during load supply.
Logic signal abnormal (Supply ON)
Bypass Module send fault simulation signal.
MITSUBISHI ELECTRIC 1100B SERIES UPS
Meaning
Page Number:
6-7
External relay
contact
(Note 1)
Major
Minor
Major