15
Fault
Number
Cause
Description
F41
Boiler safety limit
exceeded
The boiler’s measured value has exceeded the
pressure/temperature safety limit.
Subset : 4 - safety limit exceeded
F44
Burner not OFF.
This fault will lock the burner out if the AUTO input (PA10 –
PA11) is made when the control thinks the burner should not be
firing. It will also occur if the AUTO input stays ON for three
seconds after this control has opened the ‘controlled shutdown
relay’ – i.e. tried to turn the burner off.
Subset : burner status.
F46
EEPROM memory
CRC fault
The EEPROM memory in the control has been corrupted. This
memory is used to store the option parameters,
x
Interrupt power to the control.
x
Erase the system using option parameter 45.1 = 5 and
re commission (or restore with option parameter 45.2).
x
This could be due to high levels of electrical interference
getting into the product. Check all cables are correctly
screened, and screens are terminated correctly. Ensure
the mains supply is not excessively noisy.
x
If this fault persists, the control must be returned to the
supplier.
Subset : Failed Page.
F50
Oxygen probe
heater fault
The probe heater has failed to heat to the correct temperature
after 30 minutes of system power up.
x
Is the probe heater wiring correct?
x
Is the probe cell thermocouple wiring correct?
Once the fault is rectified, it will be necessary to interrupt the
power to the oxygen probe interface to make it attempt to heat
the probe once more.
Subset: O2 probe status.
L52
Oxygen low limit
alarm
The oxygen level measured value is below the oxygen setpoint
low alarm value for the current profile.
Subset: 0 = Limit violation, 1 = Probe Failed.
Содержание PPC6000 Series
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