Mitsubishi Electric M9950 Series Technical Manual page 91

MITSUBISHI
ELECTRIC
Code
Status
indication
message
(Note 3)
INVERTER
UF201
OVERVOLTAGE
INVERTER
UF202
UNDERVOLTAGE
INVERTER
UF203
OVERCURRENT
OUTPUT CIRCUIT
UF204
ABNORMAL
UPS CONTROL
UF206
CIRCUIT ERROR
UPS CONTROL
UF208
CIRCUIT ERROR
UF209 52C ABNORMAL
UF210 52C ABNORMAL
UF211 52C ABNORMAL
OVERTEMPERATU
UF213
RE
COOLING FAN
UF214
ABNORMAL
INVERTER
UF217
OVERVOLTAGE
UPS CONTROL
UF253
CIRCUIT ERROR
OUTPUT VOLTAGE
UF256
ABNORMAL
UF257 52C ABNORMAL
UF258 LOAD ABNORMAL
ANOTHER UPS
UF259
ABNORMAL
UPS CONTROL
UF301
CIRCUIT ERROR
UPS CONTROL
UF302
CIRCUIT ERROR
UPS CONTROL
UF303
CIRCUIT ERROR
M9950 SERIES UPS
OWNERS / TECHNICAL MANUAL
Meaning
Detection of output overvoltage.
Output voltage dropped.
Detection of inverter overcurrent.
Detection of a large variation of
the reference error signal (current
reference and actual current).
Discrepancy between output
voltage and external voltage
(bypass, common ac bus)
Cross current is abnormality.
Error to close the contactor 52C.
Error to open the contactor 52C.
No answer from contactor 52C
during inverter operation.
Heatsinks temperature exceeds
thermal settings.
Thermal relay activated
protection.
Detection of inverter output phase
overvoltage.
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)
MITSUBISHI ELECTRIC M9950 SERIES UPS
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Guidance Buzzer
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Continuous
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ENGINEER
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ENGINEER
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ENGINEER
6-5
External
Failure
relay
Lamp
contact
(Note
(Note 1) 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
Major Lit on
Major Lit on
Major Lit on
Major Lit on
Minor Flicker
Minor Flicker
Minor Flicker
Minor Flicker
Minor Flicker
Major Lit on
Major Lit on
Major Lit on