Troubleshooting
6-34 Manual # 42-02-1P21
RSV INPUT FAILED TO ACTIVATE (CTLA) (Hydro only)
Description: With the VALVE TYPE parameter set to PILOT RELAYS, the Redundancy Slow Valves
(RSV) input did not go high when controller deactivated the associated pilot relays.
Troubleshooting:
1. Check the wiring to the RSV spare input.
2. Verify that the RSV input is programmed in the correct spare input location.
3. Please refer to “Troubleshooting Using External Memory Mode” on page 5-57. Set the proper
external memory address for the RSV spare input. Use a 120VAC jumper to toggle the RSV
input and verify that the appropriate bit toggles.
4. Verify that the appropriate slow pilot relay (up or down) remains picked throughout the run.
RSV INPUT FAILED TO DEACTIVATE (CTLC) (Hydro only)
Description: With the VALVE TYPE parameter set to PILOT RELAYS, the Redundancy Slow Valves
(RSV) input did not go low when controller activated the associated pilot relays.
Troubleshooting:
1. Check the wiring to the RSV spare input.
2. Verify that the RSV input is programmed in the correct spare input location.
3. Please refer to “Troubleshooting Using External Memory Mode” on page 5-57. Set the proper
external memory address for the RSV spare input. Use a 120VAC jumper to toggle the RSV
input and verify that the appropriate bit toggles.
4. Verify that the appropriate slow pilot relay (up or down) remains picked throughout the run.
SABBATH OPERATION ACTIVE
Description: The spare input SAB has been activated.
Troubleshooting: Check spare input bit address for SAB. Verify that the spare input address
matches the SAB flag. Check voltage level at the SAB input.
SAFC INPUT FAILURE (CTLA)
Description: The microcontroller has detected that the Car Safety String (SAFC) input on the HC-
CTL board is in an incorrect state. It should not have 120VAC unless the SAFH input also has
120VAC.
Troubleshooting: Check the wiring or devices connected to the SAFC input. This could also be
caused by a component failure on the HC-CTL board.
SAFETY CIRCUIT IS OPEN
Description: The Car Operating Panel emergency stop switch has been pulled, or another contact
switch in the safety circuit is in the open position.
Troubleshooting: Check the C.O.P. stop switch. Check the other switches and contacts in the
safety string. Check safety string wiring against the MCE wiring diagrams.
SAFETY DROPPED BY MPU-B
Description: Safety processor B on the HC-CTL board has dropped the safety relay.
Troubleshooting:
1. Cycle power.
2. Check the event log to see what events led up to the occurrence.
SPA IS OFFLINE (CTLB)
Description: Safety processor A on the HC-CTL board is offline.
Troubleshooting:
1. Power to the HC-CTL board may not be connected. Check the CAN bus connection between the
HC-CTL board and the HC-CHP CAN hub and board.
2. Make sure that jumper JP3 on the HC-CTL board is not shorted.
3. If the SPA indicator is not lit, reboot the processor by cycling the power to the controller or by
removing CAN bus connection to the HC-CTL board for a few seconds.
4. If fault occurs while updating software, refer to update instructions and repeat process.
Table 6.1 Status and Error Messages
Scrolling Message - Special Event Message
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