76
F40
Basic drive board potentiometer supply fault
The unit has detected that the supply to the potentiometers on the basic drive board
is too high or too low.
• Is the basic drive board installed correctly?
• Is the potentiometer supply voltage selection link on the basic drive board installed?
• Are the potentiometers wired correctly?
F41
Burner interface board input fault
The unit has detected a fault with the mains inputs on the burner interface board.
• Is the burner interface board installed correctly?
• Are inputs in the range 0 – 30v (OFF) and 93 – 264v (ON) RMS?
• Is the wiring to the burner interface board correct?
• Are the links on the PSU board set for the correct mains supply voltage?
• Is PC19 (NEUTRAL) connected only to PA4 (NEUTRAL SUPPLY)?
• Are the inputs to the burner interface board on the same mains phase as the main
power supply?
• Is the mains supply excessively noisy?
Subset: Which input.
1 – down, 2 – up, 3 – auto/man, 4 – hi/low, 5 – burner on,
6 – fuel 1, 7 – fuel 2, 8 – aux. 1, 9 – ox 2, 10 – fuel 3
F43
F44
Isolated drive board in option slot 1 potenti-
ometer supply fault
Isolated drive board in option slot 2 potenti-
ometer supply fault
The unit has detected that the supply to the potentiometers on an isolated drive board
is too high or too low.
• Is the isolated drive board installed correctly?
• Are the potentiometer supply voltage selection links on the isolated drive board
installed?
• Are the potentiometers wired correctly?
Subset: +1 – channel 0, +2 – channel 1,
+4 – wrong high voltage / low voltage
F45
Option slot 1 board not recognized
The option board installed in option slot 1 is not recognized by the unit.
• Is the option board installed correctly?
F46
Option slot 2 board not recognized
The option board installed in option slot 2 is not recognized by the unit.
• Is the option board installed correctly?
F47
Option slot 1 voltage reference fault
The board installed in option slot 1 has an incorrect on-board reference level.
• Is the option board installed correctly?
Subset: +1 – channel 0, +2 – channel 1
F48
Option slot 2 voltage reference fault
The board installed in option slot 2 has an incorrect on-board reference level.
• Is the option board installed correctly?
Subset: +1 – channel 0, +2 – channel 1
F50
Commissioning data checksum fault
The commissioning data memory on the CPU board has been corrupted.
• Use option parameter 70.0 to erase all option parameters and fuel/air ratio set
points.
• Contact supplier.
Subset: faulty page
F51
RAM test fault
The main memory on the CPU board has malfunctioned.
• Contact supplier.
F52
Program memory checksum fault
The program memory on the CPU board has been corrupted.
• Contact supplier.
F53
Register test fault
The CPU has malfunctioned.
• Contact supplier.
F54
Microprocessor clock fault
The timing reference on the CPU board is incorrect.
• Are the links on the PSU board selected for the correct mains supply voltage?
• Is option parameter 1.1 set for the correct mains frequency?
• Is the on-site mains frequency incorrect?
• Use a filtered UPS power supply if the mains supply is excessively noisy.
Subset: expected mains frequency
F55
PSU calibration fault
The calibration data on the PSU board could not be read, or is corrupted. The unit will
not perform a safety shutdown but instead will use default calibration values. This
means that the modulation and RT inputs on the power supply board may not be
accurate.
• Is the PSU board installed correctly?
• Contact supplier.
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