Specifications

I.B. ATS-I005
Page 26
Effective 6/00
Unit displays Lock-Out. Circuit breaker tripped. Check for overload/short circuit condition.
Maintenance Selector Switch in Check Maintenance Selector Switch.
disable position.
Lock-out circuit wiring problem. Check lock-out circuit wiring.
Unit displays “S1 BRKR” Source 1 circuit breaker did not open Check Source 1 circuit breaker shunt trip
when it was commanded to open. (ST) wiring. Press Increase and Decrease push-
buttons simultaneously to clear message.
Source 1 circuit breaker did not close Check Source 1 circuit breaker spring release
when it was commanded to close. (SR) wiring. Press Increase and Decrease push-
buttons simultaneously to clear message.
S1 Aux Close contacts did not open Check S1 Aux Close contact input wiring
when Source 1 breaker opened. on J4-1,2. Press Increase and Decrease push-
buttons simultaneously to clear message.
S1 Aux Close contacts did not close Check S1 Aux Close contact input wiring
when Source 1 breaker closed 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 Check Source 2 circuit breaker shunt trip
when it was commanded to open. (ST) wiring. Press Increase and Decrease push-
buttons simultaneously to clear message.
Source 2 circuit breaker did not close Check Source 2 circuit breaker spring release
when it was commanded to close. (SR) wiring. Press Increase and Decrease push-
buttons simultaneously to clear message.
S2 Aux Close contacts did not open Check S2 Aux Close contact input wiring
when Source 2 breaker opened. on J4-1,2. Press Increase and Decrease push-
buttons simultaneously to clear message.
S2 Aux Close contacts did not close Check S2 Aux Close contact input wiring
when Source 2 breaker closed on J4-3,4. Press Increase and Decrease push-
buttons simultaneously to clear message.
Unit fails to communicate Addressable Relay set to incorrect address. Set Addressable Relay address to 001.
over Pre-transfer subnetwork. Addressable Relay set to incorrect baud Set Addressable Relay baud rate to 1200 baud
rate. (SW1 = ON).
Addressable Relay Watchdog and Relay Disable Addressable Relay Watchdog and
Pulse features not disabled. Relay Pulse features (SW2, SW3 = OFF).
Incorrect Addressable Relay reportback Wire to IN1 reportback input of Addressable
input used. Relay.
Twisted pair wiring not used between Use Belden 9463 twisted pair, Cutler-Hammer
Addressable Relay and IQ Transfer. IMPCABLE, or equivalent.
Addressable Relay control power Verify Addressable Relay control power of 96
deficient or absent. to 144 VAC or 48 to 125 VDC.
Symptom Probable Cause Possible Solution(s)
Table 6.1 Troubleshooting Guide (continued)