78
In
te
gr
at
ed
F
ur
na
ce
C
on
tro
l
INTEGRATED FURNACE CONTROL
PUSHBUTTON
15. PUSHBUTTON (S8)
Activation of IFC Status Menu
The status mode is entered when the pushbutton is
pressed for less than 2 seconds. While in the Status menu
at the seven segment displays, the
CATEGORY FIELD
is
displayed first for one second immediately followed by the
appropriate value for one second. This cycle repeats until
60 seconds has expired or the pushbutton has been
pushed again for less than two seconds. If the button is
pressed again for less than 2 seconds within the 60 sec-
ond period, the next
CATEGORY FIELD
will be displayed
and the 60 second timer will be reset. After displaying all
of the categories listed, the control will loop back to the
first category when the button is pressed again for less
than 2 seconds.
While in the
CATEGORY FIELD
, if the pushbutton is
pressed for more than 2 seconds but less than 5 seconds,
the display will exit the
CATEGORY FIELD
upon release
of the pushbutton. Otherwise, the status menu will auto-
matically exit if no activity is sensed on the pushbutton for
60 seconds.
The categories will be displayed in the following se-
quence:
Category
Information
FL
Up to six faults
(Example: = 22 - 46 - 30 =)
AF
IBM CFM
(Example: 1251 = 12-51, 745 = 7-45)
Fr
Fire rate
UI
Furnace size (in thousands of Btu)
tr
Temperature Rise in Degrees F
(example 55)*
*If the Supply Air Temperature Sensor is not available, the
category will not be displayed.
Fault history display (FL)
Up to 6 faults are stored in the buffer with the most recent
replacing the oldest fault.
Unless otherwise specified, when a fault becomes active it
is to be stored in non-volatile memory provided no more
than three occurrences of any given fault code are already
stored in the fault buffer. If a fault occurs and there are al-
ready 3 occurrences of the same fault in the buffer, the
current fault will replace the oldest of the same fault in the
buffer but will become the most recent fault displayed.
Before updating the fault history the history will be exam-
ined for the previous most recent record. If the most re-
cent record in the history is the same fault number but has
a lower fault level than the new fault, then instead of
adding the new fault to the buffer, the previous fault and
level are replaced with the new fault and level. The time
stamp will also be updated. This way, the existing fault will
be updated but a new fault will not be added.
2
0
30
2
1
93
2
2
d1
2
3
68
2
4
61
2
5
71
2
6
26
2
7
34
2
8
58
2
9
14
2
10
33
2
11
23
1,2
12
22
2
13
77
1,2
14
59
2
15
10
2
16
44
1,2
17
45
1,2
18
46
2
19
55
1,2
20
57
1
21
11
1
22
13
1
23
65
1
24
67
1
25
66
1
26
60
1
27
12
0
28
C
l
0
29
X
0
30
h
0
31
C
0
32
c
0
33
cd
0
34
C
d
0
35
hP
0
36
xP
0
37
dF
0
38
F
1
39
82
1
40
84
1
41
81
1
42
d4
1
43
d6
0
44
0
1
45
99
Note 1:
Fault level 0 = Status (No Fault), 1 = Warning, 2 = Critical Fault
Note 2:
Multiple fault scenarios are displayed by priority. A lower
number indicates a more critical fault. Most critical fault has priority=0.
DISPLAY CODES
F
a
u
lt
L
e
v
e
l
P
ri
o
ri
ty
F
a
u
lt
C
o
d
e
s
Description
Open Fuse
Internal Control Fault Detected
No Model Data
No Blower Communications
Blower Fault -Motor Can NOT Run
Inducer Fault
Line and Neutral Reversed or Poor Ground
IDM Overcurrent
Water Circuit Open
Flame Present With Gas Valve Off
Over Temperature Switch (RollOut) Open
Auxiliary Limit Switch Open
Main Limit Switch Open
No Gas Valve Feedback Signal
Water Sensed
One - Hour Lockout
Low Pressure Switch Closed, Should be Open
Low Pressure Switch Open, Inducer On High Speed
Low Pressure Switch Open, Inducer On Low Speed
High Pressure Switch Closed, Should Be Open
High Pressure Switch Open, Inducer on High Speed
Failed Ignition
Flame Lost after Established
Mid Pressure Switch Closed, Should be Open
Mid Pressure Switch Open, Should be Closed
Blower Cutback
Blower Fault -Blower Can Still Run
Low Flame Sense Current
Calibration Sequence Active (cold/warm/postpurge)
Call for High Heat
Call for Low Heat
Call for High Cooling Present
Call for Low Cooling Present
Low Cooling with Dehumidification Active
High Cooling with Dehumidification Active
Low Heat Pump Operation
High Heat Pump Heating Operation
Defrost Operation
Call for Fan Present
Supply Air Sensor Fault
Outdoor Air Sensor Fault
Return Air Sensor Fault
No valid Model Data On Memory Card
Horsepower Conflict On Memory Card
System Off, Standby Mode No Thermostat Call Or Errors
Remote Faults Resets Performed
92-104632-05-00
