NTI 87740, Installation And Operation Manual

Page: 109 / 116

TFTN 085-199 Installation and Operation Manual
109
Error Code Problem Possible Remedy
Error
Type
Faulty sensor – check for proper readings from the boiler
Outlet and Inlet temp sensors (see Table 18-2).
109 – High pressure CH
Water pressure > Max
pressure setting
(parameter 24.3.3)
Water pressure to high – reduce water pressure. Confirm
correct functioning/installation of the pressure regulator
and expansion tank.
Warning
Max pressure setting to low – increase Max pressure
setting (parameter 24.3.3).
Faulty wiring
– ensure the wire harness is connected to
the water pressure sensor. Check for broken wires
Faulty sensor
– replace pressure sensor
110 1 – Supply Sensor
Outlet temp sensor
reads as an open or
closed circuit
Faulty wiring – check the wiring to the Outlet sensor for
water or corrosion
Auto
Reset
Faulty sensor – check for proper readings from the boiler
Outlet temp sensor (see Table 18-2).
112 1 – Return Sensor
Inlet temp sensor reads
as an open or closed
circuit
Faulty wiring – check the wiring to the Inlet sensor for
water or corrosion
Auto
Reset
Faulty sensor – check for proper readings from the boiler
Inlet temp sensor (see Table 18-2).
113 – Low water cut off
fault
LWCO circuit is open
Low water – ensure the boiler is free of air and
pressurized to at least 12 PSI. Take care to install the auto
air-vent on the outlet pipe above the LWCO
Auto
Reset
Blown 24V fuse – If the power light is not on at the LWCO,
check the 2A blade fuse on the Low Voltage Connection
PCB; see Figure 18-4.
Faulty wiring
– check the wiring to the LWCO for water or
corrosion
Faulty LWCO
– replace the LWCO
114 – Outdoor
temperature not
available
Outdoor temperature
reading is not available
Connect an outdoor sensor to OD NTC. If an outdoor
sensor is already connected, check the connections and
wiring…compare resistance to Table 18 -2.
Warning
If connected to WiFi, turn Internet Weather on; see
Connectivity section.
If using internet weather, make sure the boiler is
connected to WiFi and registered with an address; see
WiFi Connection section.
If not using outdoor reset, adjust AUTO Temperature
Control Mode accordingly, i.e., do not set to “Outdoor
Temp”, or set to “Not active” globally from the Home
Screen (press blinking house symbol)
115 – Common flow
sensor error
System sensor reading
is invalid
System sensor not connected – if using a system sensor, it
must be connected at AUX1 NTC.
NOTE : Cascade applications require a system sensor to be
connected to the Manager boiler.
Warning
Auxiliary Sensor 1 set as System Sensor – if NOT using a
system sensor, Auxiliary Sensor 1 setting (see Sensor
Configuration section) must NOT be set as System Sensor.
Faulty wiring – check the wiring to the System sensor for
water or corrosion
Faulty sensor
– check for proper readings from the System
sensor (see Table 18-2).
117 1 Supply Sensor