Tft Series Installation and Operation Instructions
│
Trinity
65
Table 16-1 Troubleshooting Chart
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Lockout 138 – Flame too low
Blocked venting
Check for blockage of the exhaust-vent, Air-inlet,
combustion blower, gas valve venturi, heat
exchanger etc.
Fowled or faulty flame sensor
Inspect flame sensor for cracks of fowling, clean
or replace as necessary.
Incorrect combustion settings
Check combustion settings, correct accordingly.
Lockout 173 - Pilot relay
feedback incorrect
Lockout 174 – Safety relay
feedback incorrect
External Electrical Noise
Look for sources of electrical noise, i.e. a large
motor or multiple pieces of equipment starting at
the same time.
Failing Limit Switch in ILK circuit
Check operation of internal LWCO, and/or
external limit (i.e. devise connected between “R”
and “LIM”); replace as necessary
Hardware failure of Sola controller
Reset power, If problem persists replace Sola
controller.
Alert 206 – Lead Lag header
temperature was invalid
System Sensor not connected
If desired, install System Sensor and wire to
SENSOR input connections “SYSTEM” and
“COM”. Otherwise ignore Alert 206
Alert 233 – Lead Lag outdoor
temperature was invalid
See Alert 248
Alert 248 – CH outdoor
temperature was invalid
Outdoor sensor not connected
The Trinity Tft is factory set with Outdoor Reset
enabled. Connect outdoor sensor or disable
Outdoor Reset.
Outdoor sensor wiring
Check wiring of outdoor sensor. Wires should
connect to SENSOR inputs “OUTDOOR” and
“COM”.
Faulty sensor
Check sensor. Should be free of ice and snow.
Check resistance of sensor and compare to
thermistor resistance chart, see Table 16-2.
Alert 448 – Flame too low
Blocked venting, dirty heat
exchanger, failing flame sensor,
poor combustion settings.
Indicates that the burner had to shut down due to
insufficient flame signal. If Alert persists, refer to
Lockout 138.
Alert 449 – Modulation rate
was limited due to flame
strength
Normal operation
Indicates
that
the
minimum
permissible
modulation rate was temporarily increased due to
low flame signal strength. If Alert persists, refer
to Lockout 138.
Inoperative CH and/or DHW
pump
Blown fuse
Check Fuse
"
B
"
.
Faulty Sola controller
If Fuse “B” not blown, and Sola controller is
operating, navigate to pump diagnostic on display.
Manually switch pump on, check for 120VAC at
pump connection terminal on line voltage barrier
strip. If 120VAC not detected, replace Sola
controller.
Faulty pump
If 120VAC supplied to pump, and pump does not
operate, replace pump.
Blower operating at high
speed while burner is off
Blower signal cable disconnected
Verify that the 5-position Molex connector on
the wiring harness is securely connected to its
mating connector on the blower.
Check that the 4-position Molex connector on
wiring harness is securely connected to its
mating connector on the Sola controller.
No 24VAC to Sola controller
Check Power LED on Sola controller.
Check Fuse
"
C
"
.
With an AC voltmeter measure voltage at
terminals J8 1 & 2, 24VAC should be present.
