TP-6461 1/08
35
Section 2 Controller Troubleshooting
2.9
Controller Troubleshooting Table
Also see the transfer switch troubleshooting tables in Section 3.
Problem
Possible Cause
Check
See
Section
No LEDs illuminated and/or
display is blank
No power to the transfer switch
Check that source switches or circuit
breakers are closed.
—
p y
Verify that at least one source is
available. Check for utility or gen set
voltage to the ATS.
3.3.2
Check source connections.
No power to the controller
Check that the transfer switch harness
is connected to the controller.
3.3.1
Figure 4-5
Check the harness for loose
connections or broken leads (continuity
check).
W/D
One or more faulty LEDs
Press the Lamp Test button to check
the operation of all LEDs.
4.1.3
Replace the controller if one or more
LEDs do not light during the lamp test.
4.14
If no LEDs light during the lamp test,
troubleshoot power and connections to
the controller.
4.3
Source available LED off when
Source is available
Malfunctioning LED
Press the Lamp Test button to check
the operation of all LEDs. Replace the
controller if one or more LEDs do not
light. If no LEDs light, troubleshoot
power and connections to the
controller.
4.1.3
Source settings do not match
actual source parameters
Check settings.
2.4
Incorrect ATS meter calibration
Check calibration.
4.9
Position LED not lit
Position microswitch malfunction
Check the operation of the position
microswitches.
4.10
Transfer switch in intermediate
position
Manually operate the transfer switch
and check the position LED operation.
TOC
p
Check the control contact operation.
TOC
Check for evidence of solenoid coil
damage. Test solenoid coil resistance
and operation.
3.6
Replace the coil if necessary.
TOC
LEDs not functioning
See “No LEDs illuminated” in this table.
—
Inphase monitor does not operate Inphase monitor function not
enabled
Check that the inphase monitor option
on the ATS controller is selected.
ATS O/I/M
Transfer angle setting
Check the transfer angle setting.
ATS O/I/M
Inphase monitor option not
available (programmed-transition
models)
Not available on programmed-transition
models. Center-OFF position makes
the inphase monitor option
unnecessary.
—
O/I/M= Operation and Installation Manual; O/M = Operation Manual; TOC = Table of Contents, this manual;
W/D = Wiring Diagrams
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