Mitsubishi Electric 9900B Series Owner Technical Manual page 67

MITSUBISHI
ELECTRIC
Table 6.1 (continuation)
Code
Status
indication
message
(Note 3)
DC
UF103
UNDERVOLTAGE
CHOPPER
UF108
OVERCURRENT
DC
UF109
UNBALANCED
ZERO PHASE
UF110
OVERCURRENT
UPS CONTROL
UF111
CIRCUIT ERROR
DC CIRCUIT
UF112
ABNORMAL
DC GROUND
UF119
FAULT
CONTROL
UF128 POWER SUPPLY
ABNORMAL
DC VOLTAGE
UF151
ABNORMAL
DC VOLTAGE
UF152
ABNORMAL
UF154 CB2 ABNORMAL
CHG.STOPPED
UF156 (BATTERY
OVERTEMP.)
BATTERY
UF157 OVERTEMPERA
TURE
BATTERY LIQUID
UF158
LOW
DC GROUND
UF159
FAULT
UPS CONTROL
UF160
CIRCUIT ERROR
CHG.STOPPED
UF161 (DC VOLT.
ABNORMAL)
BATTERY
UF162
ABNORMAL
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL
Meaning
DC voltage dropped below
the undervoltage level.
Detection of DC overcurrent.
Major unbalance of the
neutral point voltage.
Detection of converter
zero-sequence overcurrent.
Battery current unbalance.
Sudden change of the DC
voltage level.
Detection of DC ground
fault.
Power supply voltage to
IGBT driver PCB is below
the specified level.
24 hours after input power
restoration, batteries does
not reach float voltage level.
Unable to equalize the
voltage of various batteries
after 24 hours.
During UVT, status signal
from CB2 is ON.
UF157 failure persisted for
over 2 hours.
Detection of
overtemperature at the
batteries.
Low level of battery
electrolyte solution.
Detection of DC ground
fault.
Abnormal behavior of DC
current sensor.
UF151 failure is running for
over 24 hours.
Failure detection based on
battery self-check.
MITSUBISHI ELECTRIC 9900B SERIES UPS
Guidance Buzzer
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuouss
SERVICE
ound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Continuous
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CHECK Intermittent
BATTERY sound
CHECK Intermittent
BATTERY sound
CHECK Intermittent
BATTERY sound
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
CALL
Intermittent
SERVICE
sound
ENGINEER
Page Number:
6-4
External Failure
relay contact lamp
(Note 1) (Note 2)
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Minor Flicker
Minor Flicker
Minor Flicker
Minor
Battery Flicker
abnormal
Minor
Battery Flicker
abnormal
Minor
Battery Flicker
abnormal
Minor Flicker
Minor Flicker
Minor Flicker
Minor Flicker