Display Menu Guide
│
FTV I&O Manual
72
Code
Description
Loc 28
Flame present before ignition
– check flame sensor (replace); check condensate drain for blockages;
increase post purge setting (Installer Menu setting 2-30).
Loc 29-30
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Loc 31
Flame lost three times during one demand –
see Loc 1.
Loc 32 up
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 45-51
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 52
Incorrect Field Wiring –
check electrical connections to field terminal strip; ensure the Thermostat is
connected to terminals 7 and 8.
Err 53
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 54
Flame detected out of sequence
– check/replace flame sensor; check flame sensor wiring; check
condensate drain for blockages; replace controller.
Water on control board
– if the controller got wet, replace controller.
Err 55-57
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 58-59
Water Pressure Error –
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].
Err 60
Flue Sensor Error –
flue temperature
reading had exceeded 205
⁰
F; the combustion fan remains operating
at minimum modulation rate until the error clears (when flue temperature drops below 153
°
F).
Occurrence of the error suggests that the combustion chamber needs cleaned or the heat exchanger
needs descaled. If the error persists after the flue has cooled, temporarily disconnect the electrical
connector from the flue sensor; if problem goes away replace flue sensor [see Figure 19-1(a), item 20];
if problem persists, replace the controller [see Figure 19-1(d), item 61].
Err 61
Return Sensor Error
– inlet temperature exceeded 203
⁰
F; error clears when inlet temperature drops below
190
⁰
F: (1) ensure there is water flow through the boiler, (2) check for correct return sensor reading
(menu reading 1-09), (3) check wiring to return sensor; replace sensor [see Figure 19-1(a), item 24].
Err 62-63
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 64
Faulty Grounding
– check appliance grounding to breaker panel, check internal ground connections.
Err 65
Incorrect Polarity
– controller has sensed reversed polarity of the 120VAC power supply; check field
wiring to L2 NEUTRAL (terminals 14 &15) and L1 120VAC (terminal 16). There should be 120VAC
potential between L1 120VAC and ground, and 0VAC potential between L2 NEUTRAL and ground.
Err 66
Incorrect Frequency –
the controller accepts a line voltage frequency of 60Hz ± 2%; if outside this range
the controller may be damaged or function incorrectly. If using a generator as a power source, install a
UPS (uninterruptible power supply) between the generator and boiler.
Err 67
Faulty Earth Ground
– check grounding of boiler and power supply; replace controller.
Err 68-71
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 72
Supply Sensor Open
– check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
Err 73
Supply Sensor Fault
– check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
Err 74-77
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 78
Flue Sensor Open –
check wiring to flue sensor; replace sensor [see Figure 19-1(a), item 20].
Err 79
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 80
Supply Sensor Shorted
– check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
Err 81
Supply Sensor Shorted
– check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
Err 82-85
Controller Malfunction
– contact NTI, check field wiring, replace controller.
Err 86
Flue Sensor Shorted
– see Err 60.
Err 87
Reset Button Error
– controller has sensed that the “Reset” button (see Figure 17.2) is stuck, inspect
button, try pressing and releasing it to “unstick” it, if necessary remove plastic overlay from display.
Turn power off and on, if problem persists, replace display.
Err 88-92
Controller Malfunction
– contact NTI, check field wiring, replace controller.
