Trane TVR Pro CO Series Service Manual page 70

2.8 xE9: EEPROM mismatch
Digital display output
In the error code, 'x' is a placeholder for the compressor system (compressor and related electrical components), with 1
representing compressor system A and 2 representing compressor system B.
Description
 1E9 indicates a compressor A EEPROM mismatch.
 2E9 indicates a compressor B EEPROM mismatch.
 All units stop running.
 Error code is only displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: Compressor drive parameter is mismatch.
 Recover condition: Compressor drive parameter is match.
 Reset method: Manually restart.
Possible causes
 Outdoor unit was powered on immediately after being powered off.
 Main PCB damaged.
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