Troubleshooting and Diagnostics
DANGER
HAZARDOUS VOLTAGES CAN CAUSE SEVERE INJURY OR DEATH.
These charts may indicate problems that require authorized GE Zenith service personnel.
Hazardous voltages may exist on termination plugs other than those that go into the Entelli-Switch 250.
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
a GE Zenith Representative for further assistance.
NOTE
: When you use the troubleshooting charts,
the Annunciation column refers to the
LED
’s on
the control panel.
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
Generator is in OFF position
Investigate why Engine Control
Switch was turned off
Engine does not stop
LCD Display -
“TD Engine Cool Down”
U timing cycle not complete
Check U timer setting
SOURCE 1 POSITION, and
SOURCE 1 and SOURCE 2
AVAILABLE LEDs on,
but U timer has timed out
Engine start wires not
terminated correctly
Check Engine Start Connections
Generator in MANUAL
Place generator in AUTO
ATS will not transfer
to SOURCE 2
SOURCE 2 AVAILABLE
LED off
SOURCE 2 voltage or frequency
not within acceptable parameters
Check: Engine Start Connections,
Generator Breaker, Generator Output,
and Engine Control Switch
ZTG Series
None
Power supply connector unplugged Plug in connector
LCD Display -
“S1 _ _ _ _ TD XFR S1>S2
Time Remaining _ _ _ _”
W
timing cycle not complete
Check
W
Timer setting
ATS will not transfer
to SOURCE 1
LCD Display -
“ATS Open
Time Remaining _ _ _ _”
DW
timing cycle not complete
Check
DW
Timer setting
ZTGD Series
SOURCE 1 AVAILABLE
LED off
SOURCE 1 voltage or frequency
not within acceptable parameters
Check utility and utility breakers
None
Power supply connector unplugged Plug in connector
LCD Display -
“Diagnostic Code 001”
Limit switch or RT box
connector unplugged
Call Technical Services
LCD Display -
“S1 OK
Time Remaining _ _ _ _
Bypass”
T
timing cycle not complete
Check
T
Timer setting
LCD Display -
“ATS Open
Time Remaining _ _ _ _”
TD
timing cycle not complete
Check
DT
Timer setting
Table 5
ZTS / ZTSD Operation and Maintenance Manual (71R-3000)
GE Zenith Controls
24