64
G2020 Series UPS Installation and Operation Manual
– 94861-004
Code
indication
(Note 3)
LCD Screen Status
Message
Meaning
Recommended
Action
Buzzer
External relay
contact
(Note 1)
Failure
lamp
(Note 2)
UF112
DC CIRCUIT
ABNORMAL
Sudden change of the DC voltage
level.
CALL SERVICE
ENGINEER
Continuoussou
nd
Major
Cont. On
UF113
DC CIRCUIT
ABNORMAL
Unit current unbalance.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF119
DC GROUND
FAULT
Detection of DC ground fault.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF128
CONTROL POWER
SUPPLY
ABNORMAL
Power supply voltage to SiC driver
PCB is below the specified level.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF151
DC VOLTAGE
ABNORMAL
24 hours after input power
restoration, batteries do not reach
float voltage level.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF152
DC VOLTAGE
ABNORMAL
Unable to equalize the voltage of
various batteries after 24 hours.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF154
CB2 ABNORMAL
During UVR, status signal from CB2
is ON.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF156
CHG.STOPPED
(BATTERY
OVERTEMP.)
UF157 failure persisted for over 2
hours.
CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Blinking
UF157
BATTERY
OVERTEMPERA
TURE
Detection of over temperature at the
batteries.
CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Blinking
UF158
BATTERY LIQUID
LOW
Low level of battery electrolyte
solution.
CHECK BATTERY
Intermittent
sound
Minor
Battery
abnormal
Blinking
UF159
GROUND FAULT
Detection of DC ground fault (L).
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF161
CHG.STOPPED
(DC VOLT.
ABNORMAL)
UF151 failure is running for over 24
hours.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF162
BATTERY
ABNORMAL
Failure detection based on battery
self-check.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF163
BATTERY
VOLTAGE
ABNORMAL
Battery voltage is abnormality.
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
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
Blinking
UF172
CHG.STOPPED
(DEVICE STATUS)
Energy storage device abnormal
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF179
GROUND FAULT
Detection of DC ground fault (M).
CALL SERVICE
ENGINEER
Intermittent
sound
Minor
Blinking
UF201
INVERTER
OVERVOLTAGE
Detection of output overvoltage.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF202
INVERTER
UNDERVOLTAGE
Output voltage dropped.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF203
INVERTER
OVERCURRENT
Detection of inverter overcurrent.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF204
OUTPUT CIRCUIT
ABNORMAL
Detection of a large variation of the
reference error signal (current
reference and actual current).
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF206
UPS CONTROL
CIRCUIT ERROR
Discrepancy between output voltage
and external voltage (bypass,
common ac bus)
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF207
ZERO PHASE
OVERCURRENT
Inverter zero-sequence overcurrent.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF208
UPS CONTROL
CIRCUIT ERROR
Cross current is abnormality.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF209
52C ABNORMAL
Error to close the contactor 52C.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF210
52C ABNORMAL
Error to open the contactor 52C.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF211
52C ABNORMAL
No answer from contactor 52C
during inverter operation.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF213
OVERTEMPERATU
RE
Heat sinks temperature exceeds
thermal settings.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
UF214
COOLING FAN
ABNORMAL
Thermal relay activated protection.
CALL SERVICE
ENGINEER
Continuous
sound
Major
Cont. On
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