Lycoming TEO-540-C1A Maintenance Manual page 469

TEO-540-C1A Engine Maintenance Manual
Fault ID 162
Fault
5V sensor supply 3 slew rate fault
Description
Root Cause This fault indicates 5V sensor supply 3 slew rate is greater than the calibrated maximum
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault still active or repetitive? If yes, go to step 2. If no, monitor engine operation
for the fault to repeat. If fault repeats, go to step 2.
2. If fault is still active or repetitive, but is not affecting engine operation, contact Lycoming for further
assistance. If fault affects engine operation (ie... causes other faults), replace the ECU.
Fault ID 163
Fault
Thermocouple offset voltage slew rate
Description
This fault indicates thermocouple offset voltage slew rate is greater than the calibrated
Root Cause
maximum
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Vary the throttle
setting to allow the EGT, CHT, and TIT to increase and decrease with engine operation. Is the fault
active?* If yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. If the fault is active and no other associated faults exist, replace the ECU.
*NOTE: This fault is usually associated with another thermocouple fault. If there are any other active
thermocouple faults, go to troubleshooting steps for the corresponding fault.
Fault ID 164
Fault
ECU supply voltage slew rate
Description
Root Cause This fault indicates ECU supply voltage slew rate is greater than the calibrated maximum
1. With Ignition switch in OFF position, remove ECU power by pulling the ECU circuit breaker. Wait 10s
before resetting. Is fault still active or repetitive? If yes, go to step 2. If no, monitor engine operation
for the fault to repeat. If fault repeats, go to step 2.
2. If fault is still active or repetitive, but is not affecting engine operation, contact Lycoming for further
assistance. If fault affects engine/ECU operation (ie... causes other faults, affects performance), replace
the Power Box.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Fault Group 21
Troubleshooting Steps
Fault Group 21
Troubleshooting Steps
Fault Group 21
Troubleshooting Steps
[FAULT: 5V sensor supply 3 slew
Fault Name
rate]
Fault Lamp
[FAULT: thermocouple offset
Fault Name
voltage slew rate]
Fault Lamp
[FAULT: ECU supply voltage slew
Fault Name
rate]
Fault Lamp
None
None
None
Appendix D
Page 439