Table 17.5: Hardware Circuitry Error Messages
(Continued)
DescriptionHardware Circuitry Error Messages
Over temperatureOVERTEMPERATURE
Flame-relay 1 driving failureFLAME RELAY FAILURE
Flame-relay 2 driving failureSAFE RELAY FAILURE
The input signal of both sensors are higher than 2.45VSENSORS VALUES TOO HIGH
Sensor type unknownSENSOR TYPE UNKNOWN
Check internal sensor short faultSENSOR SHORT FAILURE
Input signal too highINPUT SIGNAL TOO HIGH
EEPROM is no longer responding to read/write requestsFRAM DEADLOCK
Analog input wrong conversionA/D CONVERSION FAILURE
2.5V reference voltage failureREFERENCE VOLTAGE FAILURE
0V reference voltage failureZERO VOLTAGE FAILURE
Sensor 1 voltage failCHANNEL 1 VOLTAGE FAILURE
Sensor 2 voltage failCHANNEL 2 VOLTAGE FAILURE
Wrong frequency: there is a discrepancy between the
CPU oscillator
CLOCK TEST FAILURE
17.1.2 Non-Fatal Errors
Error messages for non-fatal errors are reported through the serial communication
channels, and stored in the Fault History field of the local display.
Table 17.6: Faults Messages and Description
DescriptionError Message
Low-voltage input and low Flicker-Frequency (less than 5 Hz) [Safe Flame
only]
NO INPUT SIGNAL
High voltage limit reached [Safe Flame, 4 to 20 ma]HIGH INPUT LIMIT
Low intensity and high Flicker-Frequency error, based on the three
following conditions:
FREQUENCY HIGH
– If Intensity Drop-Out is > 3 AND
– Current Intensity is <= 3 AND
– Frequency > 98
8VZZ005286 B 111
17 Diagnostics
17.1 Failures Detected by On-board Diagnostic Routines
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