Lycoming TEO-540-C1A Maintenance Manual page 470

Fault ID 165
Fault
Actuator supply voltage slew rate
Description
This fault indicates actuator supply voltage slew rate is greater than the calibrated
Root Cause
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 (i.e...causes other faults, affects performance), replace
the Power Box.
Fault ID 166
Fault
Description
Root Cause
Fault ID 167
Fault
Description
Root Cause
Fault ID 168
Fault
ACJ temperature voltage slew rate
Description
This fault indicates ACJ (Auto Cold Junction) temperature slew rate is greater than the
Root Cause
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. Check area surrounding ECU and Power Box to ensure there is nothing that could be causing a rapid
temperature change. If something is found, correct discrepancy. If nothing is found, go to step 3.
3. 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.
Appendix D
Page 440
Fault Group 21
Troubleshooting Steps
Fault Group 21
Troubleshooting Steps
Fault Group 21
Troubleshooting Steps
Fault Group 22
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
[FAULT: actuator supply voltage
Fault Name
slew rate]
Fault Lamp
-Reserved-
Fault Name
Fault Lamp
-Reserved-
Fault Name
Fault Lamp
[FAULT: ACJ temperature slew
Fault Name
rate]
Fault Lamp
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November 2018