17
Fault
Number
Cause
Description
F74
Profile Invalid
This fault means that the control can’t fire the currently selected
profile because it isn’t sure it still matches the burner / site
configuration. It could lead to a hazardous situation.
There are three possible causes to this fault :
1 – A drive has been commissioned in this profile but has now
been deselected. If a profile is commissioned with two air
dampers but then the second air damper is de-selected with
option parameter 4.0 to 4.9, obviously the profile is no longer
valid.
Subset : Drive number (0 to 9)
2 – Servo / Drive changed. If the system is commissioned then
later one of the servos is changed for a new one (i.e. different
serial number), any profiles that use that servo are now
considered invalid. This is to force the engineer to ensure the
new servo is mechanically fixed the same way as the original
one.
Subset : Invalid p 100 (101 to 104).
3 – The selected profile has been uploaded from a PC, but has
not been verified on this burner.
Subset : Invalid p 100 (101 to 104).
In all cases the F74 can be cleared by switching to another
(good) profile, or by re-commissioning the profile in ‘commission
ratio’ mode, making sure all points up to and including high fire
are acknowledged using the ‘NEXT’ key (or ‘ENTER’ if the points
are adjusted).
F75
Power-up Lockout
The control has locked out on power-up. This will normally be
because option parameter 1.0 is set to 1.
Subset :
0 – See option parameter 1.0.
254 – Serial EEPROM write failure.
255 – NV Lockout verification failed.
F77
Secondary relay
fault
A secondary fault has occurred with the main 1, main 2, pilot,
vent or non-volatile lockout relays. If the fault persists for 23
hours, the burner will shutdown.
x
Contact
supplier
Subset : Failed relay number.
Summary of Contents for PPC6000 Series
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