MITSUBISHI ELECTRIC 9900B SERIES UPS
MITSUBISHI
ELECTRIC
9900B SERIES UPS
OWNERS / TECHNICAL MANUAL
Page Number:
6-2
Table 6.1 Fault Code List
Code
indication
(Note 3)
Status
message
Meaning
Guidance
Buzzer
External
relay contact
(Note 1)
Failure
lamp
(Note 2)
UA801
AC INPUT
VOLTAGE OUT
OF RANGE
Input line voltage is out of the
specific range.
CHECK
INPUT
POWER
SOURCE
Intermittent
sound
Alarm
AC input
abnormal
-
UA802
AC INPUT
FREQUENCY
OUT OF
RANGE
Input line frequency is out of
the specified range.
CHECK
INPUT
POWER
SOURCE
Intermittent
sound
Alarm
AC input
abnormal
-
UA803
AC INPUT
PHASE
ROTATION
ERROR
Input line power conductors
are not wired in a proper
phase sequence.
CHECK
INPUT
POWER
SOURCE
Intermittent
sound
Alarm
AC input
abnormal
-
UA804
CONVERTER
OPE.
PROHIBITION
The converter interlock is
active.
-
Intermittent
sound
Alarm
-
UA805
INVERTER
OVERLOAD
The output load current has
exceeded 105% of the rated
current.
WARNING:
DECREASE
LOAD
Intermittent
sound
Alarm
Overload
-
UA806
INVERTER
OVERLOAD
The output load current has
exceeded 110% of the rated
current.
WARNING:
DECREASE
LOAD
Intermittent
sound
Alarm
Overload
-
UA807
INVERTER
OVERLOAD
The output load current has
exceeded 125% of the rated
current.
WARNING:
DECREASE
LOAD
Intermittent
sound
Alarm
Overload
-
UA808
INVERTER
OVERLOAD
The output load current has
exceeded 150% of the rated
current.
WARNING:
DECREASE
LOAD
Intermittent
sound
Alarm
Overload
-
UA810
INVERTER
OVERLOAD
Short time over-current has
exceeded 150% of the rated
current
WARNING:
DECREASE
LOAD
Intermittent
sound
Alarm
Overload
-
UA812
BYPASS
VOLTAGE OUT
OF RANGE
Bypass line voltage is out of
the specific range.
CHECK
BYPASS
INPUT
Intermittent
sound
Alarm
Bypass
Input
Abnormal
-
UA813
BYPASS
PHASE
ROTATION
ERROR
Bypass line power conductors
are not wired in a proper
phase sequence.
CHECK
BYPASS
INPUT
Intermittent
sound
Alarm
Bypass
Input
Abnormal
-
UA814
BYPASS
FREQUENCY
OUT OF
RANGE
Bypass line frequency is out of
the specific range.
CHECK
BYPASS
INPUT
Intermittent
sound
Alarm
Bypass
Input
Abnormal
-
UA815
TRANSFER
PROHIBITION
Transfer to bypass is not
available due to bypass
abnormality.
-
Intermittent
sound
Alarm
-
UA817
EMERGENCY
STOP
ACTIVATED
The emergency stop was
activated by the EPO switch or
an external contact.
-
-
Alarm
-
UA821
TRANSFER
PROHIBITION
The UPS cannot transfer to
the bypass because the
inverter output is not
synchronized to the bypass.
-
-
Alarm
-
Summary of Contents for 9900B Series
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