1. Clean or replace the flame sense rod or check all
connections and wire between the rod and the gas
furnace control.
2. Replace or reposition the igniter or check all con-
nections and wire between the igniter and the fur-
nace control.
3. Replace the furnace control.
4. Check the manifold pressure during ignition. For
natural gas it should be approx. 3.5” w.c. and for
LP gas it should be 11” w.c. If manifold pressure
is good, watch the burner during ignition. If the first
burner lights, but the second, third and so on do not
light, the burner may need to be replaced.
12.7
11 - Failed ignition
12.7.1
Description
The fault is displayed at the furnace control after the first
failed ignition attempt. It continues to be displayed un-
til successful ignition or the furnace control has failed to
ignite four consecutive times. After four attempts, the sta-
tus of the fault is elevated to “10” and the furnace control
reacts as described under description for the fault code
“10”.
12.7.2
Causes
There can be several causes for a failed ignition at-
tempt(s). The most common are:
1. The flame sense rod is unable to sense flame. It
may need cleaning or may not be properly con-
nected.
2. The gas valve may be turned off.
3. The igniter is not working properly. It may not be
properly connected.
4. The furnace control may not be working properly
and may need to be replaced.
5. The flame may not be properly spreading from the
first burner to the last.
12.7.3
Solutions
The solutions depend on the cause. Solutions to noted
causes (1) to (5) above are:
1. Clean or replace the flame sense rod or check all
connections and wire between the rod and the fur-
nace control. Make sure furnace ground is properly
connected.
2. Turn the valve on.
3. Replace or reposition the igniter or check all con-
nections and wire between the igniter and the fur-
nace control.
4. Replace furnace control.
5. Check the manifold pressure during ignition. For
natural gas it should be approx. 3.5” W.C. and for
LP gas it should be 8.6” W.C. If manifold pressure
is good, watch the burner during ignition. If the first
burner lights, but the second, third and so on do not
light, the burner may need to be replaced.
12.8
12 - Low Flame sense
12.8.1
Description
The flame sense current from the flame sense rod at the
furnace control is weak.
12.8.2
Causes
1. The most common cause for low flames sense dur-
ing heat operation is that the flame sense rod may
need cleaning or may not be properly connected or
wiring between the rod and the furnace control may
be shorted or opened.
2. Another cause for low flame may be an improperly
mounted or poorly grounded flame sensor.
3. The flame sensor is broke.
12.8.3
Solutions
1. Clean the flame sense rod and check all connec-
tions and wire between the rod and the furnace
control.
2. Reinstall sensor and check wiring and connections.
Also make sure the furnace is properly grounded.
3. Replace de flame sensor.
12.9
13 - Flame lost
12.9.1
Description
After a successful ignition trial, the flame (which was
properly sensed) is no longer sensed. This can happen
any time after successful ignition while a valid heat call is
present.
42
Содержание Chinook C105-M-V
Страница 24: ...Figure 10 Typical gas pipe arrangement 23...
Страница 27: ...Figure 11 Wiring Diagram 26...
Страница 39: ...Figure 14 Wiring Diagram Modulating t stat 38...
Страница 53: ...Table 17 CFM 52...
Страница 54: ...Figure 15 Dimensional Drawing 53...
Страница 55: ...14 PART LIST 54...
Страница 56: ...Figure 16 Exploded view 1 55...
Страница 57: ...Figure 17 Exploded view 2 56...
Страница 59: ...Table 19 Parts list continued 58...
Страница 60: ...Table 20 Parts list MS 59...
Страница 61: ...Table 21 Parts list MS continued 60...
