NTI TFTN - Page 111

TFTN 085-199 Installation and Operation Manual
111
Error Code
Problem
Possible Remedy
Error
Type
301 – Display error
Eeprom
Power problem /
defective PCB
1.Test for proper voltage and grounding.
2.Switch the boiler OFF and ON at the main electrical
power supply. If the problem happens again replace the
main PCB
Auto
Reset
302 – Communication
error GP - GIU
Wiring between display and PCB issue:
1. Test for proper voltage and grounding.
2. Switch the boiler OFF and ON at the main electrical
power supply. If the problem happens again replace
the main PCB
Auto
Reset
Power problem – Check the wire connection between the
PCB and the display for damage, corrosion or other
problems.
303 – PCB internal error
PCB internal error (to
reset, switch the power
to the boiler off/on)
Water pressure sensor wiring damaged or shorted:
1. Check the water pressure switch wiring for damage or
shorts
2. Test for proper voltage and grounding.
Manual
Reset
Power problem – test for proper voltage and grounding.
Faulty PCB – if the problem persists, replace the PCB
304 – Too many resets
> 5 resets in 15 minutes
(to reset, switch the
power to the boiler
off/on)
Check error history (see Error section) and correct the
source of the respective fault codes.
Manual
Reset
305 – PCB internal error
PCB internal error (to
reset, switch the power
to the boiler off/on)
Power problem – test for proper voltage and grounding.
Manual
Reset
Faulty PCB – if the problem persists, replace the PCB
306 – PCB internal error
PCB internal error (to
reset, switch the power
to the boiler off/on)
Power problem – test for proper voltage and grounding.
Manual
Reset
Faulty PCB – if the problem persists, replace the PCB
307 – PCB internal error
PCB internal error (to
reset, switch the power
to the boiler off/on)
Power problem – test for proper voltage and grounding.
Manual
Reset
Faulty PCB – if the problem persists, replace the PCB
309 – flame detection
while burner is off
Damaged flame sensor or flame sensor wire – check flame
sensor and flame sensor wire for damage, replace flame
sensor
Manual
Reset
Water damage – check flame sensor and PCB for water
damage or corrosion
Flooded combustion chamber – If the condensate drain
was blocked and the chamber flooded, dry the chamber
and flame sensor
PCB internal fault – If the Flame sensor wire is good and
the flame sensor has been replaced, replace the PCB
3P9 – Sched.
Maintenance-Call for
Service
Months to next
maintenance time has
elapsed
Service the boiler and select RESET from the Setup ->
Diagnostics -> Service menu; see Diagnostics section.
Warning
411 – Room sensor
circuit open or short
circuit Zone 1
Room sensor circuit
open or short circuit
Zone 1
BUS wiring damaged – Inspect BUS wiring for bad
connections
Auto
Reset
Damaged PCB – If nothing is wired to the BUS
connections, replace the PCB.
412 – Room sensor
circuit open or short
circuit Zone 2
Room sensor circuit
open or short circuit
Zone 2
BUS wiring damaged – Inspect BUS wiring for bad
connections
Auto
Reset
Damaged PCB – If nothing is wired to the BUS
connections, replace the PCB.