78
F76
Oxygen probe purge check
The measured value from the oxygen probe was less than 18.0% at
the end of pre-purge. Trim is disabled.
Subset: Oxygen level x 10
F77
Auto trim commissioning fault
The measured oxygen level exceeded 15.0% during auto trim commissioning. The
burner is shutdown.
Subset: Last auto trim commission setpoint
L78
Flue temperature low alarm value exceeded
The measured flue temperature is below the low alarm value for the current profile, or
the flue thermocouple is faulty.
L79
Flue temperature high alarm value exceeded
The measured flue temperature has exceeded the high alarm value for the current
profile.
L80
CO high alarm value exceeded
The measured CO level has exceeded the high alarm value for the current profile, or
the CO feedback signal is outside the range 4-20mA.
L81
Smoke high alarm value exceeded
The measured smoke level has exceeded the high alarm value for the current profile,
or the smoke feedback signal is outside 4-20mA.
L82
NOx high alarm value exceeded
The measured NOx level has exceeded the high alarm value for the current profile, or
the NOx feedback signal is outside 4-20mA.
L83
SOx high alarm value exceeded
The measured SOx level has exceeded the high alarm value for the current profile, or
the SOx feedback signal is outside 4-20mA.
F91
Option board 1 calibration fault
The calibration data on the board installed in option slot 1 has become corrupted. If
the fault persists for 23 hours, the burner will shutdown.
• Is the board in option slot 1 installed correctly?
• Contact supplier.
F92
Option board 2 calibration fault
The calibration data on the board installed in option slot 2 has become corrupted. If
the fault persists for 23 hours, the burner will shutdown.
• Is the board in option slot 2 installed correctly?
• Contact supplier.
F93
Safety shutdown relay fault
A fault has occurred with the safety shutdown relay. If the fault persists for 23 hours,
the burner will shutdown.
• Is the burner I/O board installed correctly?
• Is the wiring to the burner I/O board correct?
• Is a live feed connected to PC1 when the unit receives a burner on signal on PC12.
• Is the mains phase correct?
F94
Program memory secondary checksum fault
A fault has occurred with the program memory on the CPU board. If the fault persists
for 23 hours, the burner will shutdown.
•Contact supplier
F95
Watchdog secondary fault
A fault has occurred with the watchdog circuit on the CPU board. If the fault persists
for 23 hours, the burner will shutdown.
• Contact supplier
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