Part number 550-142-850/0716
85
FreeStyle
®
WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
32 Troubleshooting(continued)
Figure 1094ROUBLESHOOTINGSUGGESTIONSFORFreeStyle
®
BOILERS&AULTDISPLAYSANDDIAGNOSTICS(continued)
Fault
Code
Fault Condition Correction
A01
No burner ignition
No gas
the air has been eliminated from the pipes.
Ignition/detection electrode fault
Check the wiring of the electrode and that it is
correctly positioned and free of any deposits
Combustion incorrect
Natural gas & LP fuel
Perform combustion test for Natural gas & LP
fuel per chart section Figure 98, page 73 and
Figure 101, page 74.
Faulty gas valve Check the gas valve and replace it if necessary
Check the gas supply pressure
Trap blocked
Check the trap and clean it if necessary
Also inspect gas valve, blower, venturi, igniter,
and heat exchanger, and replace those with
signs of damage.
A02
Flame present signal
with burner off
Electrode fault
Check the ignitor electrode wiring
Electrode deformed/misaligned and/or im-
proper gap (5/32”)
Card fault Check the card
A03
Over temperature pro-
tection activation
Heating sensor damaged
Check the correct positioning and operation of
the heating sensor
No water circulation in the system Check the circulating pump
Air in the system/heat exchanger Vent the system/purge heat exchanger
A04
Exhaust duct safety
device activation
Fault F07 generated 3 times in the last
24 hours
See fault F07
A05
Fan protection activated
Fault F15 generated for 1 hour (con-
secutive)
See fault F15
A06
-
tion stage (6 times in 4
minutes)
Ignitor electrode fault
Check the position of the ignitor electrode and
replace it if necessary
Flame unstable Check the burner
Gas valve Offset fault Check the Offset adjustment at minimum power
Air/fume ducts obstructed
ducts and air inlet and terminals
Trap blocked
Check the trap and clean it if necessary
Also inspect gas valve, blower, venturi, igniter,
and heat exchanger, and replace those with
signs of damage.
F07
High exhaust tempera-
ture
Air trapped in boiler heat
exchanger
Combustion not correct
for Natural gas and LP
fuel
Boiler water piping and
circulator not providing
The exhaust probe detects an excessive
temperature
Check the exchanger
Purge out air in heat exchanger
Figure 98, page 73 and Figure 101, page 74.
Check piping sizes and required pump models
F10
Supply sensor 1 fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
F11
Return sensor fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
F12
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensorWiring shorted
Wiring disconnected
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