No 24 VAC
Power to control
Power -up veri fica ti on of LED
Control Faul t Detected Hard
Lock
Revers ed Li ne Voltage Pol ari ty RED No CFH required.
System Lockout - Retri es
Exceeded
Retries are defi ned as fai led igni ti on a ttempts,
i.e. no flame sense during the trial for ignition
peri od. Recycl es a re defined as l oss of fl ame
after flame has been established during the
trial for ignition period, and there is no limit to
the number of recycl es.
Pressure Sensor Null Error:
Inconsistent reading with
inducer off
Control wa i ts 5 s econds after CFH before
displaying fault. Fault is displayed until fault
condition corrects or CFH is removed.
Pressure Sensor Span Error:
Inconsistent reading with
inducer on
Span test maximum duration is 90 seconds.
Once the span test fails, the control continues
to attempt to start furnace and fault is
displayed until fault condition corrects or CFH
i s removed.
4 Fl ashes High Limit Switch Open RED
When an open limit is detected, the control
energizes the blower at cooling speed and the
inducer at the RUN setting - no CFH required.
Once the limit closes and the CFH is present,
the furnace returns to normal operation. Three
limit events in a single CFH results in a 1 hour
lockout.
Fl ame Pres ent with
Gas Valve OFF
When detected, the control energizes the
inducer at the "Run" setting, energize the
blower on Heat speed, and displays fault - no
CFH required. Control continues normal
operation when fault condition is corrected.
6 Fl ashes Auxiliary Limit Open RED
When detected, the control energizes the
inducer a maximum speed, the blower at
cooling speed and displays fault - no CFH
required. Control continues normal operation
when fault condition is corrected.
7 Fl ashes Gas Valve Circuit Shorted RED
Vol tage s ensed at the ga s va l ve termi nal wi th
the s afety rel ay i n the de-energized s tate. The
inducer is energized to maximum speed.
Lockout Notes
Power cycle will
reset a l l
lockout timers
Conti nuous Res et Cycl e Power
30 seconds
Operation continues after fault
correction
5 second lockout Unlimited
Retries
5 minute lockout Unlimited
Retries
5 minute lockout
1 hour lockout after three
faults in a single CFH
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