22
8- MODULATING CHINOOK FURNACE FAULT CODES
Display code
Diagnostic Description
1
Long Run Time
2
System Pressure Trip
3
Short Cycling
4 (L4)
Locked Rotor
5 (L5)
Open Circuit
6 (L6)
Open Start Circuit
7 (L7)
Open Run Circuit
9
Low Secondary Voltage
11
Failed ignition
12
Low flame sense current
13
Flame lost after established
14
Flame present with gas valve off
21 (L21)
Low Pressure Switch Trip
22
Main limit switch open.
23
Auxiliary limit switch open
26
Line Neutral Reversed
27
Check Line Voltage
28
High Line Voltage
29 (L29)
High Pressure Switch Trip
30
Fuse Open
33
MRLC Open
44
Low pressure switch closed, inducer off
45
Low pressure switch open, inducer on high speed
46
Low pressure switch open, inducer on low speed
55
High pressure switch closed, inducer off
57
High pressure switch open, inducer on high speed
60
Blower Fault Run
61
Blower Fault No Run
66
RPM out of range (over 1200 RPM)
68
No Blower Communication
77
Servo circuit open
78
Servo control fault
79
No Gas Valve Feedback
80
Low Airflow
81
Return air sensor out of range
82
Supply air sensor out of range
83
Coil Temperature Sensor Fault
84
Outdoor Ambient Temperature Sensor Fault
93
Board Failure
P
Compressor Protector Fault
d1
No Shared Data
d3
Insufficient Indoor CFM
d4
Memory Card Invalid
d5
Card Hardware Conflict
d6
Blower Horsepower Conflict
d7
Blower Manufacturer Conflict
d8
Old Shared Data
