NTI TFTN 085-399 Installation And Operation Manual page 113

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