Instructional Booklet
Page
24
Effective: March 2012
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-800 Closed/Open Transition Transfer Switch Controller
For more information visit: www.eaton.com
IB ATS-C103
Table 3. Troubleshooting Guide (Cont.)
SYMPTOM
PROBABLE CAUSE
POSSIBLE SOLUTION(S)
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
Unit displays “S1 BRKR”
Source 1 circuit breaker did not open when it was com-
manded to open.
Source 1 circuit breaker did not close when it was com-
manded to close.
S1 Aux Close contacts did not open when Source 1
breaker opened.
S1 Aux Close contacts did not close when Source 1
breaker closed
Check Source 1 circuit breaker shunt trip (ST) wiring. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check Source 1 circuit breaker spring release (SR) wiring. Press Increase and
Decrease push-buttons simultaneously to clear message.
Check S1 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check S1 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Unit displays “S2 BRKR”
Source 2 circuit breaker did not open when it was com-
manded to open.
Source 2 circuit breaker did not close when it was com-
manded to close.
S2 Aux Close contacts did not open when Source 2
breaker opened.
S2 Aux Close contacts did not close when Source 2
breaker closed
Check Source 2 circuit breaker shunt trip (ST) wiring. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check Source 2 circuit breaker spring release (SR) wiring. Press Increase and
Decrease push-buttons simultaneously to clear message.
Check S2 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check S2 Aux Close control input wiring on J4-3,4. Press Increase and Decrease
push-buttons simultaneously to clear message.
Unit displays “S1 CONT”
Source 1 contactor did not open when it was com-
manded to open.
Source 1 contactor did not close when it was com-
manded to close.
S1 Aux Close contacts did not open when Source 1
contactor opened.
S1 Aux Close contacts did not close when Source 1
Contactor closed
Check Source 1 contactor trip wiring. Press Increase and Decrease push-buttons
simultaneously to clear message.
Check Source 1 contactor close wiring. Press Increase and Decrease push-buttons
simultaneously to clear message.
Check S1 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check S1 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Unit displays “S2 CONT”
Source 2 contactor did not open when it was com-
manded to open.
Source 2 contactor did not close when it was com-
manded to close.
S2 Aux Close contacts did not open when Source 2
contactor opened.
S2 Aux Close contacts did not close when Source 2
contactor closed
Check Source 2 contactor trip wiring. Press Increase and Decrease push-buttons
simultaneously to clear message.
Check Source 2 contactor close wiring. Press Increase and Decrease push-buttons
simultaneously to clear message.
Check S2 Aux Close control input wiring on J4-1,2. Press Increase and Decrease
push-buttons simultaneously to clear message.
Check S2 Aux Close control input wiring on J4-3,4. Press Increase and Decrease
push-buttons simultaneously to clear message.
Unit fails to communicate over Load Sequencing-
subnetwork.
Addressable Relay(s) set to incorrect address.
Addressable Relay(s) set to incorrect baud rate.
Addressable Relay(s) Watchdog and Relay Pulse fea-
tures not disabled.
Incorrect Addressable Relay(s) reportback input used.
Twisted pair wiring not used between Addressable
Relay(s) and ATC-800.
Addressable Relay(s) control power deficient or absent.
Set Addressable Relay(s) address from 002 to 00B.
Set Addressable Relay(s) baud rate to 1200 baud (SW1 = ON).
Disable Addressable Relay(s) Watchdog and Relay Pulse features (SW2, SW3 = OFF).
Wire to IN1 reportback input of Addressable Relay(s).
Use Belden 9463 twisted pair, Eaton IMPCABLE, or equivalent.
Verify Addressable Relay(s) control power of 96 to 144 VAC or 48 to 125 VDC.
Unit fails to communicate over IMPACC network. Wrong or conflicting address set on PONI.
Communications wiring errors.
PONI failure.
ATC-800 is malfunctioning.
Check that PONI has a unique address on the system and that software is addressing
proper unit.
Verify wiring is in conformance to IMPACC wiring rules.
Replace PONI.
Replace the unit.
Unit did not allow setpoints to be downloaded over
IMPACC.
Run/Program switch is not in Run position.
IMPACC communications error.
Set Run/Program switch to Run position.
See “Unit fails to communicate over IMPACC network.”
