Single Stage Multi Position Furnace
Service
Manual
48
440 08 2001 02
HONEYWELL SV9541 “SMART VALVE” Trouble shooting continued
LED
STATUS
INDICATES CHECK/REPAIR
6 Flashes
+
3 Flashes
Soft Lockout.
Last failure was pressure switch
Maximum recycle count exceeded
Combustion air blower is de--energized, Circulating
blower is de--energized after the “OFF” delay.
After 5--minute delay time, control system will reset
and initiate a new ignition sequence,
Ignition system control switch must be in the ON position.
Pressure switches operation, tubing, and wiring.
Restrictions in furnace air intake or vent piping.
High winds blowing against vent.
6 Flashes
+
4 Flashes
Soft Lockout.
Last failure was limit circuit opened during run.
Combustion air blower is de--energized, Circulating
blower is de--energized after the “OFF” delay.
After 5--minute delay time, control system will reset
and initiate a new ignition sequence,
Main limit switch.
Limit and rollout switch wiring is in good condition and se-
curely
connected.
Restriction in duct work.
Dirty filte r
Overfire
7 Flashes
Soft Lockout.
Blower failure (typical)
Limit trip took longer than 2 minutes to reset.
System will start a new ignition sequence after 1 hour,
if call for heat still present.
Dead blower.
Blocked duct work.
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