A
M-TRAC1
IOM-55
May 2019
17
M-TRAC1 LOCK OUT DESCRIPTION
Table 8
LED Code
Reasons
B Irregular
Faulty flame relay or wiring error. Ignition control and safety shut off valve
should be off (FR and CFR contact ‘open’, but receiving power to VFB120
indicating valve is still on.
Faulty flame relay or wiring error. FR and CFR contacts closes, but feedback
from safety shut off valve to VFB120 happening too fast.
B Slow
High limit open.
C Irregular
Air sensor self test. When the blower is off, the sensor reading should be below
0.7 Vdc.
Then the fan turns on, the air sensor reading should increase,
C Fast
Very low air flow. Sensed air flow is below 40%.
C Slow
Low air flow. Sensed air flow is below 60%.
C On
High air flow. Sensed air flow is over 120%.
D Fast
Ignition failure.
E Irregular
Open discharge air sensor. Sensor resistance should not exceed 1940, or 3450 Ω
for dual sensors.
E Fast
Low limit. Discharge temperature has fallen below 40°F (4°C).
SENSOR TABLE
Sensor Resistance Chart for TE 6100-960 and TE600EA3.
Table 9
˚C
˚F
Resistance Ω
˚C
˚F
Resistance Ω
˚C
˚F
Resistance Ω
-40
-40
597
4.4
40
877
48.9
120
1229
-34.4
-30
629
10
50
916
54.4
130
1279
-28.9
-20
661
15.6
60
958
60
140
1329
-23.3
-10
694
21.1
70
1000
65.6
150
1381
-17.8
0
728
26.7
80
1043
71.1
160
1433
-12.2
10
763
32.2
90
1088
76.7
170
1487
-6.6
20
800
37.8
100
1134
82.2
180
1542
-1.1
30
838
43.3
110
1181
87.8
190
1599
Note: Reference resistance is 1035 ohms at 77˚F. Resistance tolerances are ±0.05 to 0.15% at 77˚F.
