Installation and Operation Manual
TFTN 085-199
114
Error Code
Problem
Possible Remedy
Error
Type
605
–
Flue sensor open
circuit
Flue sensor reading is
invalid
Faulty wiring
–
check the wiring to the Flue sensor for
water or corrosion
Auto
Reset
Faulty sensor
–
check for proper readings from the Flue
sensor (see Table 18-2).
612 1 Fan Speed Too
Low Blower
Fan speed did not
achieve the correct
speed
Faulty wiring
–
check the 4-wire harness between the fan
and PCB for damage and check it for continuity. On the 3-
wire harness, verify 120VAC between black and white.
Manual
Reset
Faulty fan
–
remove the 4-wire harness from the fan, if it
does not run at high speed replace the fan.
Faulty PCB
–
if the wiring and fan are ok, replace the main
PCB.
Unconfigured
–
It
’
s
needed to configure the
device, press OK to
proceed
Boiler is configured as a
Follower, but it does
not see a Manager
boiler connected to the
BUS
Faulty wiring
–
if the boiler is a Follower in a cascade
system, check the BUS wiring to each boiler. Note: BUS
wiring is polarity sensitive.
Missing Manager
–
configure one of the boilers in cascade
as Manager; see section
Incorrect setting
–
if application is a stand-alone boiler,
set Boiler Address = Single Boiler. Press OK and select
Single boiler under Available Configurations
Conflict
BUS conflict
Incorrect settings
–
two or more boilers in the cascade
have been set with the same Boiler Address. Disconnect
each from the BUS and set a unique Boiler Address at
each boiler.
Multiple zone controllers with dip switches set to on
–
there can only be two zone controllers connected to the
BUS, and only one can have the dip switches set to on; see
section
Table 18-2 Thermistor Resistance vs. Temperature
Temp °F (°C)
Resistance Ohms (Ω)
Temp °F (°C)
Resistance Ohms (Ω)
-22 (-30)
176,133
122 (50)
3,603
-4 (-20)
96,761
131 (55)
2,986
14 (-10)
55,218
140 (60)
2,488
32 (0)
32,650
149 (65)
2,083
41 (5)
25,390
158 (70)
1,752
50 (10)
19,900
167 (75)
1,481
59 (15)
15,710
176 (80)
1,258
68 (20)
12,490
185 (85)
1,072
77 (25)
10,000
194 (90)
918
86 (30)
8,057
203 (95)
789
95 (35)
6,531
212 (100)
680
104 (40)
5,327
230 (110)
506
113 (45)
4,369
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