
MITSUBISHI ELECTRIC 9900B SERIES UPS
MITSUBISHI
ELECTRIC
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-6
Table 6.1 (continuation)
Code
indication
(Note 3)
Status
message
Meaning
Guidance
Buzzer
External
relay contact
(Note 1)
Failure
lamp
(Note 2)
UF253
UPS CONTROL
CIRCUIT ERROR
Discrepancy between output
voltage and inverter voltage,
or between output voltage
and bypass voltage.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF256
OUTPUT
VOLTAGE
ABNORMAL
Output voltage is out of the
specified range.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF257
52C ABNORMAL
Contactor 52C failed to open
during load transfer from
inverter to bypass.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF258
LOAD
ABNORMAL
Load transfer due to
overload for over 4 times
within 5 minutes.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF259
ANOTHER UPS
ABNORMAL
No detection of another UPS
voltage signal.
CALL
SERVICE
ENGINEER
Intermittent
sound
Minor
Flicker
UF301
UPS CONTROL
CIRCUIT ERROR
AD reference has an
abnormal value.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF302
UPS CONTROL
CIRCUIT ERROR
Detection of an external
interruption during the
software execution.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF303
UPS CONTROL
CIRCUIT ERROR
Timer does not reset in the
specified period (WDT
settings)
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF305
UPS CONTROL
CIRCUIT ERROR
Detection of an abnormal
clock speed in the DSP or
FPGA.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF306
UPS CONTROL
CIRCUIT ERROR
Control power supply
voltage are below the
specified level.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF309
INVERTER
VOLTAGE
ABNORMAL
Inverter voltage is out of the
specified range.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF310
CONTROL
POWER SUPPLY
ABNORMAL
Backup control power
supplies exhibit abnormal
condition.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF320
UPS CONTROL
CIRCUIT ERROR
Cable disconnection in the
parallel interface board
during load supply.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF323
UPS CONTROL
CIRCUIT ERROR
Major communication error
during parallel operation.
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF331
CONTROL
POWER SUPPLY
ABNORMAL
Cable disconnection in the
main driver PCB (Phase A)
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF332
UPS CONTROL
CIRCUIT ERROR
Cable disconnection in the
main driver PCB (Phase B)
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF333
UPS CONTROL
CIRCUIT ERROR
Cable disconnection in the
main driver PCB (Phase C)
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
UF334
UPS CONTROL
CIRCUIT ERROR
Cable disconnection in the
main driver PCB (Chopper))
CALL
SERVICE
ENGINEER
Continuous
sound
Major
Lit on
Содержание 9900B Series
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