Instructional Booklet
Page
22
Effective: March 2010
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-600 Automatic Transfer Switch Controller
For more information visit: www.eaton.com
IB ATS-1005
Section 6: Troubleshooting and Maintenance
6.1 Level of Repair
This manual is written with the assumption that only transfer
switch system troubleshooting will be performed. If the cause of
malfunction is traced to an ATC-600, the unit should be replaced
with a spare. The malfunctioning unit should then be returned to
Eaton for factory repairs.
6.2 ATC-600 Device Troubleshooting
The Troubleshooting Guide (Table
3
) is intended for service per-
sonnel to identify whether a problem being observed is
Table 3. Troubleshooting Guide.
NOTICE
DURING CONVERSATIONS WITH EATON CONCERNING TROUBLE-
SHOOTING OR PRODUCT RETURN, THE CUSTOMER MAY BE ASKED
FOR INFORMATION PERTAINING TO THE SOFTWARE VERSION AND
OPTIONS INCLUDED IN THE SPECIFIC UNIT. REFER TO THE “NOTE”
UNDER THE TOPIC “HELP PUSHBUTTON” IN PARAGRAPH 3.4 FOR
INSTRUCTIONS ON HOW TO OBTAIN THIS INFORMATION.
SYMPTOM
PROBABLE CAUSE
POSSIBLE SOLUTION(S)
All front panel indicator LED’s are off.
Control power is deficient or absent.
ATC-600 is malfunctioning.
Verify that control power is connected at J7 and that it is within specifications.
Replace the unit.
Automatic LED is not blinking.
Control power is deficient or absent.
Stuck waiting for Neutral position
ATC-600 is malfunctioning
Verify that control power is connected at J7 and that it is within specifications.
Mechanical problem; No reportback from limit switch.
Replace the unit.
One or more voltage phases read incorrectly.
Incorrect wiring.
ATC-600 is malfunctioning.
Verify voltage with multimeter. Check wiring.
Replace the unit.
Front panel pushbuttons do not work.
Bad connection inside ATC-600.
Replace the unit.
Unit did not accept new setpoints via front panel. Operator error.
No pushbuttons pressed for 2.5 minutes.
Change setpoints with switch in Program position. Return switch to Run position to
save setpoints before pressing Display Selectpushbutton.
Avoid intervals of 2.5 minutes of inactivity with pushbuttons when changing set-
points.
Voltage dropout and pickup setpoints are different
than what was programmed.
Adjusted nominal voltage setpoint.
Re-adjust all dropout and pickup setpoints to default values.
Frequency dropout and pickup setpoints are differ-
ent than what was programmed.
Adjusted nominal frequency setpoints.
Re-adjust all dropout and pickup setpoints to default values.
Changed undervoltage or overvoltage or underfre-
quency or overfrequency dropout setpoint and the
pickup setpoint changed also.
Pickup upper or lower limit ranges are dependent upon
dropout setpoints. To prevent misapplication, they are
automatically adjusted when overlapping occurs.
Source 1 or Source 2 is not available when it
should be.
Voltage and/or frequency is not within setpoint values. Verify voltage and/or frequency with multi-meter.
Check programmed setpoint values.
Source 1 or Source 2 is not shown connected
when it should be on faceplate LEDs.
Do not have contact closure at S1 or S2 AUX CLOSE
control input.
ATC-600 is malfunctioning.
Verify contact closure at desired control input on J4.
Replace the unit.
Engine fails to start after TDES times out.
S1 or S2 Generator start relay contacts not closed.
Incorrect wiring at generator.
Replace the unit.
Check engine wiring/maintenance.
Engine fails to turn off after TDEC times out.
S1 or S2 Generator start relay contacts not open.
Incorrect wiring at generator.
Connected LED not lit for either source.
Replace the unit.
Check engine wiring.
Verify contact closure at desired control input on J4. Replace the unit.
Unit will not perform an Engine Test.
Engine Test pushbutton was not pressed twice.
Display window is not blank before initiating test.
Engine Test setpoint is set to Disable-(value of “2”).
Number of Generators setpoint is set to 0.
Press Engine Test pushbutton twice to initiate test.
Use Display Select pushbutton to toggle to Status LED. If a timer is timing down,
wait until it is done.
Re-program Engine Test setpoint.
Re-program Number of Generators setpoint.
Unit displays “WAIT 0.00”
Voltage and/or frequency of generator is not within
setpoint values.
Verify voltage and/or frequency with multi-meter. Check programmed setpoint
values.
Plant exerciser (PE) failed to exercise.
Incorrect date or time setting.
Incorrect setpoint programmed for PE day and/or time.
Generator voltage and/or frequency did not become
available within 30 seconds of engine starting.
Verify real time settings for Time/Date.
Re-program PE day and/or time setpoint.
Verify voltage and/or frequency with multi-meter. Check programmed setpoint val-
ues. Check engine maintenance.
Unit displays Lock-Out.
Circuit breaker tripped.
Maintenance Selector Switch in disable position.
Lock-out circuit wiring problem.
Check for overload/short circuit condition.
Check Maintenance Selector Switch.
Check lock-out circuit wiring.
Unit displays “INHIBIT”
No contact closure at Emergency Inhibit Input
Check Emergency Inhibit Wiring at J4, Pins 15 and 16