NTI Trinity Tft399 Installation And Operation Manual page 70

│Installation and Operation Instructions
Trinity
Table 16-1 Troubleshooting Chart
PROBLEM
pump
Inoperative CH and/or DHW
pump
Blower operating at high
speed while burner is off
Blower not operating
Table 16-2 Thermistor Resistance vs. Temperature
Resistance Ohms (Ω)
Temp °F (°C)
-22 (-30)
-4 (-20)
14 (-10)
32 (0)
41 (5)
50 (10)
59 (15)
68 (20)
77 (25)
86 (30)
95 (35)
104 (40)
113 (45)
Table 16-3 Hold and Lockout Codes
Code Description
0
None
1
Unconfigured safety data
70
POSSIBLE CAUSE
Faulty Sola controller
Faulty pump
Blower signal cable disconnected
No 24VAC to Sola controller
Blower power disconnected
Blown fuse
Faulty blower
Temp °F (°C)
176,133 122 (50)
96,761 131 (55)
55,218 140 (60)
32,650 149 (65)
25,390 158 (70)
19,900 167 (75)
15,710 176 (80)
12,490 185 (85)
10,000 194 (90)
8,057 203 (95)
6,531 212 (100)
5,327 230 (110)
4,369 -
CORRECTIVE ACTION
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.
If 120VAC supplied to pump, and pump does not
operate, replace pump.
 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.
 Check Power LED on Sola controller.
 Check Fuse
" "
C .
 With an AC voltmeter measure voltage at
terminals J8 1 & 2, 24VAC should be present.
Verify that the 3-position Molex connector on the
wiring harness is securely connected to its mating
connector on the blower.
" "
Check Fuse A using the procedure described
" "
above. Fuse A protects the blower as well as the
ignition spark generator and appliance pump.
Measure voltage across pins 1 & 2 (black and
white wires) of 3-position connector on wiring
harness. If 120VAC detected, reconnect then and
remove 5-position signal connector. Blower
should rotate at high speed. If blower does not
rotate, replace blower.
Resistance Ohms (Ω)
3,603
2,986
2,488
2,083
1,752
1,481
1,258
1,072
918
789
680
506
-
Tft Series
Note
Hold / No lockout
Lockout