NTI TFTN - Page 110

Installation and Operation Manual TFTN 085-199
110
Error Code
Problem
Possible Remedy
Error
Type
150 – Common flow
sensor overheat
System sensor reading >
210°F
Faulty wiring – check the wiring to the System sensor for
water or corrosion
Auto
reset
Faulty sensor – check for proper readings from the System
sensor (see Table 18-2).
1P1 1 – Flow check failed
(Supply Temp Change
Fast)
Outlet T-rise >
12.6°F/sec
Normal operation – In systems with high and low
temperature zones this message may be appear serval
times as zones turn off and on.
Warning
1P2 1 – Flow check failed
(Sensor Delta T Too
High)
Delta-T > 63°F
Normal operation – In systems with high and low
temperature zones this message may be appear serval
times as zones turn off and on.
Warning
1P3 1 – Flow check failed
(Supply Temp Too High)
Inlet > Outlet temp by
18°F
Normal operation – In systems with high and low
temperature zones this message may be appear serval
times as zones turn off and on.
Warning
1P4 – Low Water
Pressure
Water pressure reading
< 7 psi
Low water pressure – raise the water pressure to a
minimum of 12 psi
Warning
Faulty wiring – ensure the wire harness is connected to
the water pressure sensor. Check for broken wires
Faulty sensor – replace pressure sensor
203 – DHW Sensor
DHW tank sensor
reading is invalid
Incorrect setting – DHW Mode is set as “Tank Sensor”, but
a tank sensor is not being used. Change DHW Mode
setting to “Aquastat”
Warning
Tank sensor not connected – Connect IWH tank sensor to
DHW SWITCH/NTC
Faulty wiring – check the wiring to the Tank sensor for
water or corrosion
Faulty sensor – check for proper readings from the Tank
sensor (see Table 18-2).
209 – Storage tank
overheat
Tank sensor temp >
175°F
Plumbing problem – Boiler water is circulating through
the IWH coil during CH serving – correct piping; see Boiler
System Piping section
Warning
Tank sensor improperly installed – ensure the tank sensor
is fully inserted into the well of the tank in the proper
location.
Faulty wiring – check the wiring to the Tank sensor for
water or corrosion
Faulty sensor – check for proper readings from the Tank
sensor (see Table 18-2).
2P2 – Anti-legionella
function not finished
Anti-legionella function
is not complete (to
reset, switch the power
to the boiler off/on)
Anti-legionella Function turned on – if the anti-legionella
function is not wanted, then set Anti-Legionella Function
= Off (see DHW Setup)
Warning
Boiler setting to low – set DHW Modulation Setpoint =
180°F or higher (see User Menu)
Tank sensor improperly installed – ensure the tank sensor
is fully inserted into the well of the tank in the proper
location.
Faulty wiring – check the wiring to the Tank sensor for
water or corrosion
Faulty sensor – check for proper readings from the Tank
sensor (see Table 18-2).
Plumbing problem – verify that boiler water is circulating
to the IWH coil; see Boiler System Plumbing section