NTI Trinity Tft399 Installation And Operation Manual page 69

Tft Series
Table 16-1 Troubleshooting Chart
PROBLEM
Lockout 113 – Flame circuit
timeout
Lockout 122 – Light off rate
proving failed
Alert 128 - Modulation rate
was limited due to IAS open
Hold 137 – ILK failed to
close
Lockout 138 – Flame too low
Lockout 173 - Pilot relay
feedback incorrect
Lockout 174 – Safety relay
feedback incorrect
Alert 206 – Lead Lag header
temperature was invalid
Alert 233 – Lead Lag outdoor
temperature was invalid
Alert 248 – CH outdoor
temperature was invalid
Alert 448 – Flame too low
Alert 449 – Modulation rate
was limited due to flame
strength
Inoperative CH and/or DHW
Installation and Operation Instructions
POSSIBLE CAUSE
A flame circuit shorted to ground
may show up as a flame circuit
timeout. High resistance shorts can
display as Lockout 113.
Blower is not turning on
Missing or incorrect blower
feedback signal
Blower is always on
Incorrect Sola controller.
See Hold / Lockout 67
Blocked venting
Fowled or faulty flame sensor
Incorrect combustion settings
External Electrical Noise
Failing Limit Switch in ILK circuit
Hardware failure of Sola controller
System Sensor not connected
See Alert 248
Outdoor sensor not connected
Outdoor sensor wiring
Faulty sensor
Blocked venting, dirty heat
exchanger, failing flame sensor,
poor combustion settings.
Normal operation
Blown fuse
CORRECTIVE ACTION
Check to ensure condensate drain is not blocked.
Check to ensure no voltage is applied to R & CH
terminals. If using 4-20mA input, check to ensure
current is not greater than 21mA.
See "Blower not operating" below.
See Hold 62 above.
See "Blower operating at high speed while burner
is off" below.
Replace control with correct model.
Check for blockage of the exhaust-vent, Air-inlet,
combustion blower, gas valve venturi, heat
exchanger etc.
Inspect flame sensor for cracks of fowling, clean
or replace as necessary.
Check combustion settings, correct accordingly.
Look for sources of electrical noise, i.e. a large
motor or multiple pieces of equipment starting at
the same time.
Check operation of internal LWCO, and/or
external limit (i.e. devise connected between "R"
and "LIM"); replace as necessary
Reset power, If problem persists replace Sola
controller.
If desired, install System Sensor and wire to
SENSOR input connections "SYSTEM" and
"COM". Otherwise ignore Alert 206
The Trinity Tft is factory set with Outdoor Reset
enabled. Connect outdoor sensor or disable
Outdoor Reset.
Check wiring of outdoor sensor. Wires should
connect to SENSOR inputs "OUTDOOR" and
"COM".
Check sensor. Should be free of ice and snow.
Check resistance of sensor and compare to
thermistor resistance chart, see Table 16-2.
Indicates that the burner had to shut down due to
insufficient flame signal. If Alert persists, refer to
Lockout 138.
Indicates that the minimum
modulation rate was temporarily increased due to
low flame signal strength. If Alert persists, refer
to Lockout 138.
" "
Check Fuse B .
│
Trinity
permissible
69