TOSHIBA
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6.9.4 Line-4 System Messages
Line-4 messages reflect the UPS operating conditions. Warning messages will be
displayed when an abnormal operating condition occurs. The following chart shows
the allowable Line-4 messages.
Line-4 Messages
Displayed Message Meaning
PHEI
Displayed when input Phase rotation is not wired for
clockwise rotation.
I/O NOT SYNCHRONIZE
Displayed when input and output frequencies are not
synchronized. (abnormal)
* AUTOTRANSFER *
Displayed when auto-transfer to bypass is active (i.e.
current limit reached). (abnormal)
* BATTERY LOW *
Displayed when battery voltage is low (abnormal) or
the UPS batteries have failed self-diagnostic test.
(abnormal)
* UPS OL: REDUCE LOAD *
Displayed when UPS has tripped due to an overload
condition. (abnormal)
* DCOC *
Displayed when the UPS has an internal failure.
(abnormal)
* DCOV *
Displayed when the UPS has an internal DC bus
over-voltage. (abnormal)
* DCUB *
Displayed when the UPS has an internal DC bus
unbalance referenced to Neutral. (abnormal)
* UPS OL *
Displayed when UPS has tripped due to an overload
condition. (abnormal)
* FUSE OPEN *
Displayed when an internal transistor fuse opens.
* INOV *
Displayed when inverter output over-voltage has
occurred. (abnormal)
* INUV *
Displayed when inverter output under-voltage has
occurred. (abnormal)
* BATTOH *OR MCCB-B OPEN
Displayed when the optional battery over-temp
sensor has annunciated, or if the external battery
disconnect is open. (Verify TB3-5,6)
* UPS OK *
Displayed when none of the above abnormal
conditions are present. (normal)
* DISCHARGE CURR=###% *
Displayed when none of the above abnormal
conditions are present and the UPS is in battery
discharge mode. (normal backup)
* TRANSFER INHIBITED *
Displayed when key switch position is changed and
frequency is not synchronized. (abnormal)
* EMERGENCY OFF *
Displayed when an emergency (EPO) signal is
received.
* UPS OUTPUT DISABLED *
Displayed when UPS has normally shutdown.
* FAULT(S) DETECTED *
Displayed when a fault or faults have occurred.
(abnormal)
Note:
1) Line-4 will be blank when the BATT key is pressed during battery backup mode with
normal battery voltage.
2) The # symbol signifies numerical values or other information supplied by the UPS.
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