TFTN 085-199 Installation and Operation Manual
113
Error Code
Problem
Possible Remedy
Error
Type
Improper combustion settings
–
test combustion at Max
and Min Power as per section
Restricted air-intake or exhaust
–
check for restrictions
Dirty combustion chamber or burner
–
clean the
combustion chamber and burner
Dirty or fault flame sensor
–
clean the flame sensor with a
mild abrasive or replace the flame sensor.
Blocked condensate drain
–
ensure the condensate drain
is clear and drains freely
Damaged flame sensor cable
–
inspect flame sensor wire
for loose connections, shorts to ground or damage.
5P1
–
1st Ignition Failed
Flame signal did not
meet the minimum
threshold on the 1
st
ignition attempt
Normal operation
–
5P1 may be displayed momentarily if
there is a problem the boiler will lock out. Follow the
directions for the lockout
Warning
5P2
–
2nd ignition
attempt failed
Flame signal did not
meet the minimum
threshold on the 2
nd
ignition attempt
See lockout 501
Warning
5P6
–
3rd ignition
attempt failed
Flame signal did not
meet the minimum
threshold on the 3
rd
ignition attempt
See lockout 501
Warning
5P3
–
Detection of Flame
loss during
run
Flame signal was lost
during run
Wind
–
in some applications the flame will occasionally lift
during run due to excessive wind
Warning
Blocked venting
–
ensure nothing is obstructing the
venting
Combustion settings or Gas pressure
–
if the problem is
persistent a lockout will result, follow the trouble
shooting for the lockout. If the flame loss is bothersome
and does not result in a lockout, see error 504.
602
–
Flue sensor or flue
too hot
Exhaust temperature
exceeded 200°F (the
error can only be
cleared when the flue
temperature drops
below 190°F for 1
minute)
Inadequate water flow
–
ensure the boiler water is free of
air and pressurized to a minimum of 12 psi
Manual
Reset
Dirty Combustion chamber
–
ensure the combustion
chamber is cleaned regularly
Water scaling
–
if the error is accompanied by popping or
hissing, the boiler may have scale build-up preventing
proper heat transfer. Descale the heat exchanger if
needed.
Faulty wiring
–
check the wiring to the Flue sensor for
water or corrosion
Faulty sensor
–
check for proper readings from the Flue
sensor (see Table 18-2).
603 1
–
APS open
Blocked condensate
switch openned
Blocked Condensate
–
ensure the condensate is draining
freely and the tubing to the switch is clear
Manual
Reset
Blocked vent
–
check the exhaust and air-intake venting
for blockages.
Wiring problem
–
inspect the wires from the air switch to
the boiler control. Disconnect and reconnect each
connection
Air switch failure
–
replace the air switch
