NTI FTV150 - Page 73

FTV I&O Manual │Display Menu Guide
73
Code
Description
Err 93
Appliance Type – the appliance type stored in the display does not match the appliance type stored in the
controller. Set the appropriate appliance type using the procedure described under “Controller
Replacement Instructions”; see page 77.
Err 94 & up
Controller Malfunction – contact NTI, check field wiring, replace controller.
Afro
Anti-Frost – indicates that the boiler is in Frost Protection. When the controller has sensed a supply or
return temperature below 50°F, the Boiler and CH Pumps are switched ON. If the temperature drops
below 41°F the burner is started and operates at minimum modulation until both the supply and return
temperatures reach 60°F.
Att 2
Outdoor Sensor Shorted – controller has sensed a short circuit at the Outdoor sensor; check wiring to
terminals 3 and 5 and outdoor sensor.
Att 3
DHW Sensor Open – controller has sensed an open circuit at the DHW tank sensor; check wiring to
terminals 3 and 6 and tank sensor. If no tank sensor is being used, set DHW Mode (setting 2-08) to the
appropriate setting; see Table 17-2.
Att 4
DHW Sensor Shorted – controller has sensed a short circuit at the DHW tank sensor; check wiring to
terminals 3 and 6 and tank sensor. If no tank sensor is being used, set DHW Mode (setting 2-08) to the
appropriate setting; see Table 17-2.
Att 6
Warm Weather Shutdown (WWSD) Active – when the outdoor temperature (menu reading 1-08)
exceeds the WWSD setting (menu setting 2-04), “Att 6” is displayed during central heat demands, and
the boiler only responds to DHW demands. To avoid this error, increase menu setting 2-04. If the
indicated temperature reading does not match the actual outdoor temperature, inspect the outdoor sensor
wiring. If wiring is fine, disconnect the outdoor sensor, menu reading 1-08 should indicate “OPEn,” if
not, replace the controller, if “OPEn” is indicated replace the outdoor sensor.
Att 7
Service Reminder – occurs every 365 days; service the boiler and clear the warning by adjusting menu
setting 2-16 to “OFF”.
FILL
Low Water Pressure – increase system water pressure to a minimum of 12 PSI. If water pressure reading
at the external pressure gauge exceeds 15 PSI, inspect water pressure sensor and cable; if water pressure
sensor is dirty, gently clean with a calcium/rust remover. If necessary, replace water pressure sensor
[see Figure 19-1(a), item 24].
Notes:
1
While displaying a lockout or blocking error, the User and Installer Menus can be accessed to view the status of boiler
sensors and settings.
2
Blocking errors (Err) and some lockouts (Loc) will not clear until the fault is correct.
3
Some lockouts (Loc) can only be cleared by holding the RESET button on the display console.