Any of these failures will generate the following: Channel Mode LED will blink amber eight times and the speaker will sound eight tones. The Channel Mode LED will change to green and normal operations will be attempted after the tones are sounded. These failures indicate that the LEDs and audible alarm functions may not be reliable.
RAM Read/Write Failure - This indicates that one or more bytes of the microprocessor RAM failed a write/read test.
ROM Checksum Failure - This indicates that the microprocessor ROM failed to generate the proper checksum.
Register Read/Write Failure - This indicates that one or more of the microprocessor’s registers have become defective.
If the errors occur consistently, the DEU needs to be serviced. Contact your service provider.
RAM Checksum Failure
The Channel Mode LED will alternately blink green and amber indefinitely. This indicates that the firmware stored in the
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