Mitsubishi Electric 9900B Series Owner Technical Manual page 69

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