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G9000 Installation and Operation Manual 79
Note 3
Note 1
Note 2
Code
indication
Status message Meaning Guidance Buzzer
External
relay contact
Failure
lamp
UF109 DC UNBALANCED Major unbalance of the neutral point voltage.
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ENGINEER
Continuous
sound
Major Lit on
UF110
ZERO PHASE
OVERCURRENT
Detection of converter zero-sequence
overcurrent.
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ENGINEER
Continuous
sound
Major Lit on
UF111
UPS CONTROL
CIRCUIT ERROR
Battery current unbalance.
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ENGINEER
Continuous
sound
Major Lit on
UF112
DC CIRCUIT
ABNORMAL
Sudden change of the DC voltage level.
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ENGINEER
Continuousso
und
Major Lit on
UF119
DC GROUND
FAULT
Detection of DC ground fault UF159 exceeds
10 seconds. UPS transfers to bypass.
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ENGINEER
Continuous
sound
Major Lit on
UF128
CONTROL POWER
SUPPLY
ABNORMAL
Power supply voltage to IGBT driver PCB is
below the specified level.
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ENGINEER
Continuous
sound
Major Lit on
UF151
DC VOLTAGE
ABNORMAL
24 hours after input power restoration,
batteries does not reach float voltage level.
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ENGINEER
Intermittent
sound
Minor Flicker
UF152
DC VOLTAGE
ABNORMAL
Unable to equalize the voltage of various
batteries after 24 hours.
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ENGINEER
Intermittent
sound
Minor Flicker
UF154 CB2 ABNORMAL During UVR, status signal from CB2 is ON.
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ENGINEER
Intermittent
sound
Minor Flicker
UF156
CHG.STOPPED
(BATTERY
OVERTEMP.)
UF157 failure persisted for over 2 hours. CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Flicker
UF157
BATTERY
OVERTEMPERATU
RE
Detection of overtemperature at the
batteries.
CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Flicker
UF158
BATTERY LIQUID
LOW
Low level of battery electrolyte solution. CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Flicker
UF159
DC GROUND
FAULT
Detection of DC ground fault. Chopper
operation is stopped.
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ENGINEER
Intermittent
sound
Minor Flicker
UF160
UPS CONTROL
CIRCUIT ERROR
Abnormal behavior of DC current sensor.
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ENGINEER
Intermittent
sound
Minor Flicker
UF161
CHG.STOPPED(DC
VOLT. ABNORMAL)
UF151 failure is running for over 24 hours.
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ENGINEER
Intermittent
sound
Minor Flicker
UF162
BATTERY
ABNORMAL
Failure detection based on battery
self-check.
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ENGINEER
Intermittent
sound
Minor Flicker
UF163
BATTERY
VOLTAGE
ABNORMAL
Battery voltage is abnormal.
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ENGINEER
Intermittent
sound
Minor Flicker
UF170
VDB SENSOR
ABNORMAL
Detection of a large variation of the
difference between control-only and
protection-only battery voltage.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor Flicker
UF171
UPS CONTROL
CIRCUIT ERROR
Poor shared current in parallel chopper
circuit; or improper charging current.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor Flicker
UF172
CHG. STOPPED
(DEVICE STATUS)
Energy storage device error.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor Flicker