32
ABB Zenith
ZTSCT / ZBTSCT Operation & Maintenance Manual
Troubleshooting and Diagnostics
Symptom
Annunciation
Possible Cause(s)
Corrective Action
Engine does not START
SOURCE 2
AVAILABLE
LED off
Engine start wires not
terminated properly
Check engine start connections
Engine does not stop
LCD Display -
“TD Engine Cool Down”
SOURCE 1 POSITION, and
SOURCE 1 and SOURCE 2
AVAILABLE LEDs on,
but U timer has timed out
U timing cycle not complete
Engine start wires not
terminated correctly
Generator in MANUAL
Check U timer setting
Check Engine Start Connections
Place generator in AUTO
ATS will not transfer
to SOURCE 2
SOURCE 2 AVAILABLE
LED off
None
SOURCE 2 voltage or frequency
not within acceptable parameters
Power supply connector unplugged
Check: Engine Start Connections,
Generator Breaker, Generator Output,
and Engine Control Switch
Plug in connector
ATS will not transfer
to SOURCE 1
SOURCE 1 AVAILABLE
LED off
None
SOURCE 1 voltage or frequency
not within acceptable parameters
Power supply connector unplugged
Check utility and utility breakers
Plug in connector
General Troubleshooting
The following troubleshooting guide is used to recognize,
and determine basic faults. When using this guide, it will
ask several questions about the condition of the switch.
This guide will then list an order of the possible faults.
You will then look at the first suspected fault to determine
if it is the problem. If it is not a fault, you go to the
second suspected fault. If you go through all of the
suspected faults, or the chart instructs you to, call
an ABB Zenith Representative for further assistance.
Generator is in OFF position
Investigate why Engine Control
Switch was turned off
LCD Display -
“S1 _ _ _ _ TD XFR S1>S2
Time Remaining _ _ _ _”
W
timing cycle not complete
Check
W
Timer setting
LCD Display -
“Diagnostic Code 001”
LCD Display -
“S1 OK
Time Remaining _ _ _ _
Bypass”
Limit switch or RT box
connector unplugged
T
timing cycle not complete
Call Technical Services
Check
T
Timer setting
LCD Display -
“ATS Open
Time Remaining _ _ _ _”
DW
timing cycle not complete
Check
DW
Timer setting
LCD Display -
“ATS Open
Time Remaining _ _ _ _”
TD
timing cycle not complete
Check
DT
Timer setting
NOTE
: When you use the troubleshooting charts,
the Annunciation column refers to the
LED
’s on
the control panel.
Table 4
HAZARDOUS VOLTAGES CAN CAUSE SEVERE INJURY OR DEATH.
These charts may indicate problems that require authorized ABB Zenith service personnel.
Hazardous voltages may exist on termination plugs other than those that go into the Entelli-Switch 250.
DANGER
