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O PER AT I O N , M A I N T EN A N C E , A N D I N S TA L L AT I O N G U I D E
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6. Troubleshooting
Warning
Any troubleshooting should be conducted by trained and authorized personnel only. Appropriate personal
protectiveequipment (PPE) shall be used when troubleshooting the ATS panel.
Hazardous voltage may be present. Disconnect all power sources before performing work inside the ATS panel.
Failure to do so may result in serious injury or death.
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6.1 Alarms
LCD
Touch
Message
Fault
Action
Locked, Alarm LED on
Lock input activated
Unlock
Switch not in AUTO
mode, Alarm LED on
Selector switch is in Manual or Inhibit
mode, or HMI Operation is in "MANUAL
or INHIBIT" mode
Turn Selector Switch into the AUTO
position, or enable AUTO Operation in
HMI settings
Phases crossed
Phase rotation of sources 1 and 2 are
different
Connect the phases of both sources in
the same order
S1 undervoltage
Voltage of source 1 is under the
threshold level set in parameter “Drop-
out voltage, lower threshold“
Check the correlation between power
source and device configuration
S1 overvoltage
Voltage of source 1 is over the
threshold level set in parameter “Drop-
out voltage, upper threshold“
Check the correlation between power
source and device configuration
S1 phase missing
One or two phases of source 1 are
missing
Check the power source and
connections
S1 unbalance
Phases of source 1 are not symmetric
Check the power source
S1 phase rotation
Phase rotation of source 1 is different
from the value of parameter “Phase
sequence“
Connect the phases according to the
configuration
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 “Drop-
out 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 “Drop-
out 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
Continued on the next page
Summary of Contents for Zenith ZTS T Series
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