bad type fault: EST4 Trouble Code | Fire Alarm Resource Center
bad type fault
trouble
Edwards EST EST4
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What This Code Means
This condition occurs when a substituted device is a different model than the suspect device but is preprogrammed with the same device address.
Common Causes
1Substituted device is a different model than the suspect device
2Device preprogrammed with the same address as a different model
3Incorrect device model installed during replacement
Resolution Steps
To remove the fault, you must accept the model of the known good device using the 4-CU or replace the substituted device with a model that matches the suspect device.