ABB Zenith ZTX Series - Page 42

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Zenith ZTX series ATS, OPERATION, MAINTENANCE, AND INSTALLATION GUIDE
Alarm condition Fault Action
S1 invalid frequency Frequency of source 1 is out of range
set in parameters “Drop-out frequency,
upper threshold“ and “Drop-out
frequency, lower threshold“
Check the correlation between power
source and device configuration
S2 undervoltage Voltage of source 2 is under the
threshold level set in parameter
“Dropout voltage, lower threshold“
Check the correlation between power
source and device configuration
S2 overvoltage Voltage of source 2 is over the
threshold level set in parameter
“Dropout voltage, upper threshold“
Check the correlation between power
source and device configuration
S2 phase missing One or two phases of
source 2 are missing
Check the power source
and connections
S2 unbalance Phases of source 2 are not symmetric Check the power source
S2 phase rotation Phase rotation of source 2 is
different from the value of
parameter “Phase sequence“
Connect the phases according
to the configuration
Frequency Difference Frequency difference of voltage
sources is greater than 3 Hz while
inphase monitor is on
Alarm is active and transfer operations
disabled as long as the frequency
difference is above the accepted level
S2 invalid frequency Frequency of source 2 is out of range
set in parameters “Drop-out frequency,
upper threshold“ and “Drop-out
frequency, lower threshold“
Check the correlation between power
source and device configuration
Open I failure, Alarm
LED blinking
Switch transfer from
position I to O or II failed
Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Close I failure, Alarm
LED blinking
Switch transfer to position I failed Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Open II failure, Alarm
LED blinking
Switch transfer from
position II to O or I failed
Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Close II failure, Alarm
LED blinking
Switch transfer to position II failed Reset alarm by pressing Auto button or
via menu page Operation / Alarm Reset
Switch position alarm,
Alarm LED on
More than one switch position
indication inputs are activated Switch service needed, contact ABB
Local bus
Communication between HMI
and switch controller is off Check connection
Control Voltage
Failure
Control voltage dropped
during switch control Check power source
Control Voltage Low
Switch control voltage is
below the minimum Check power source
Configuration Error Invalid configuration Check parameter values
Table 6.1 Alarms-list in ZTX via Ekip Connect