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Instruction Booklet IB 70-8698
Instruction Manual for the Eaton RTC-100
Automatic Transfer Switch Controller
EATON CORPORATION www.eaton.com
Effective December 2009
5.4 RTC-100 Replacement
WARNING
HIGH VOLTAGES ARE PRESENT IN AND AROUND TRANSFER SWITCH
EQUIPMENT. BEFORE ATTEMPTING TO REPLACE ANY COMPONENT,
DISCONNECT THE LINE POWER FROM THE EQUIPMENT BEING SERVICED
BY OPENING AND LOCKING OUT, IF POSSIBLE, THE NEXT HIGHEST
DISCONNECT DEVICE. FAILURE TO FOLLOW THIS PROCEDURE COULD
CAUSE SEVERE PERSONAL INJURY AND/OR DEATH.
ALWAYS TURN THE UTILITY POWER OFF AND TURN THE GENERATOR
CONTROL SELECTOR SWITCH TO THE “OFF” POSITION BEFORE
ATTEMPTING TO REPLACE ANY COMPONENTS.
Step 1: Turn the Generator Start select to “OFF” before attempt-
ing to replace the RTC-100 controller. Ensure all sources of
power are removed.
Step 2: Disconnect the J1, J2, J3, J4, J5, J6, J7, and J9 plugs from
the controller
Step 3: Disconnect the customer wires connected to J7, J8, and J9.
Step 4: Remove the four (4) screws located at the corners of the
controller that secure it to the power panel. Remove the
controller. (The center support will have to be removed also.)
Step 5: Align the new controller with the mounting holes. Secure
the new controller board using the existing hardware.
Tighten the screws.
Step 6: Connect the J1, J2, J3, J4, J5, J6, J7, and J9 plugs to their
original receptacles.
Step 7: Reconnect the customer wires to J7, J8, and J9.
Step 8: Reapply power to the transfer switch.
Step 9: Place the generator control selector switch in the “AUTO”
position after the controller has been replaced. (The
Generator may start but will shut down within 5 minutes.)
Test the system for proper functionality.
Section 5: Maintenance, Troubleshooting,
and Replacement
5.1 Maintenance and Care
The RTC-100 is designed to be a self-contained and maintenance-
free unit. The printed circuit board is conformally coated at the fac-
tory. The RTC-100 is intended for service by factory-trained person-
nel only.
5.2 RTC-100 Controller Troubleshooting
The Troubleshooting Guide (Table 3) is intended for service personnel
to identify whether a problem being observed is external or internal
to the unit. For assistance with this determination, contact Eaton
Electrical. If a problem is identified to be internal, the unit should be
returned to the factory for replacement.
Table 3. Troubleshooting Guide.
Symptom Probable Cause Possible Solution(s)
“Util Avail” and “Gen Avail”
LEDs are not lit.
Power is deficient or absent. Verify that power is con-
nected at J1 – J4 and that it
is within specifications.
. RTC-100 is malfunctioning Replace the unit.
Utility source or Generator
source is not available when
it should be.
Voltage is not within
setpoint values.
Verify voltage with
multimeter. Check the
programmed setpoint values.
5.3 Level of Repair
This manual is written with the assumption that only ATS trouble-
shooting will be performed. If the cause of malfunction is traced
to an RTC-100, the unit should be replaced with a new unit. The
malfunctioning unit should then be returned to Eaton Electrical for
factory repairs.
(11 pages)
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