Maintenance And Care - Eaton ATC-300 Mode D'emploi

Instruction Booklet
Page 24 Effective: January 2006
Table 3. Troubleshooting Guide (Cont.)
Symptom
Unit will not perform an Engine Test.
Plant Exerciser failed to exercise.
Engine fails to start after the TDES
times out.
7.3 ATC-300 Replacement
Follow these procedural steps to replace the ATC-300.
Step 1: Turn off the control power at the main disconnect or
isolation switch of the control power supply. If the
switch is not located within view from the ATC-300,
lock it out to guard against other personnel acciden-
tally turning it on.
Step 2: Verify that all "foreign" power sources wired to the
ATC-300 are de-energized. These foreign power
sources may also be present on some of the terminal
blocks.
Step 3: Before disconnecting any wires from the unit, make
sure they are individually identified to assure that
reconnection can be correctly performed. Make a
sketch to help with the task of terminal and wire
identification.
Step 4: Remove all wires and disconnect plug-type connec-
tors.
CAUTION
SUPPORT THE ATC-300 FROM THE REAR WHEN THE SCREWS
ARE LOOSENED OR REMOVED IN STEP 5. WITHOUT SUCH
SUPPORT, THE UNIT COULD FALL OR THE PANEL COULD BE
DAMAGED.
ATC-300 Automatic
Transfer Switch
Controller
Probable Cause
Engine Test pushbutton was not pressed.
Display is not displaying the Home screen before initiat-
ing the test.
Engine Test setpoint is set to Disable (Value of "2").
Number of generators setpoint is set to 0.
Generator became unavailable when connected to the
load.
Generator became unavailable before connecting to the
load.
Generator voltage and/or frequency did not become
available within 90 seconds of engine starting.
Incorrect date or time setting.
Incorrect setpoint programmed for the PE DAY, PE
HOUR, and/or PE MINUTE.
Generator voltage and/or frequency did not become
available within 90 seconds of engine starting.
Generator became unavailable when connected to the
load.
Generator became unavailable before connecting to the
load.
Incorrect wiring.
Gen Start relay contacts are not closed.
Engine did not start.
For more information visit: www.eatonelectrical.com
Press the Engine Test pushbutton to initiate the
test.
Use the Step/Enter pushbutton to step to the
Home screen. If a timer is timing down, wait
until it is done.
Re-program the Engine Test setpoint.
Re-program the number of generators setpoint.
Increase the Time Delay Emergency Fail (TDEF)
timer setpoint.
Check the generator for proper function.
Verify the voltage and/or frequency with a mul-
timeter. Check the programmed setpoint val-
ues. Check the engine maintenance.
Verify real time clock settings for the time and
date.
Re-program the PE DAY, PE HOUR, and/or PE
MINUTE setpoint.
Verify the voltage and/or frequency with a mul-
timeter. Check the programmed setpoint val-
ues. Check the engine maintenance.
Increase the TDEF timer setpoint.
Check the generator for proper function.
Check the wiring between the Gen Start relay
(J-5, Pins 13 and 14) and the engine.
Replace the unit.
Check the generator for proper function.
Step 5: Remove the four (4) mounting screws, located on
the four corners, which hold the unit and trim plate
against the door or panel. These are accessed from
the front of the unit. Support the unit and remove
the two center screws.
Step 6: Remove the unit from the door or panel. Lay the
original mounting screws aside for later use.
Step 7: Align the unit with the opening in the door or panel.
Step 8: Using the original mounting hardware, secure the
replacement unit to the door or panel.
Step 9: Using the sketch mentioned in Step 3, replace each
wire at the correct terminal and make sure each is
secure. Make certain that each harness plug is
securely seated.
Step 10: Restore control power to the unit.

7.4 Maintenance and Care

The ATC-300 is designed to be a self-contained and mainte-
nance-free unit. The printed circuit boards are calibrated and
conformally coated at the factory. They are intended for ser-
vice by factory-trained personnel only.
Possible Solution(s)
IB01602001T