ICP N9MP1 Service Manual page 50

Service Manual
HONEYWELL SV9541 "SMART VALVE" Trouble shooting continued
LED
INDICATES
STATUS
Soft Lockout.
Last failure was pressure switch
6 Flashes
Maximum recycle count exceeded
+
3 Flashes
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,
Soft Lockout.
Last failure was limit circuit opened during run.
6 Flashes
+
Combustion air blower is de--energized, Circulating
4 Flashes
blower is de--energized after the "OFF" delay.
After 5--minute delay time, control system will reset
and initiate a new ignition sequence,
Soft Lockout.
Blower failure (typical)
7 Flashes
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.
440 08 2001 02
Single Stage Multi Position Furnace
CHECK/REPAIR
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.
Main limit switch.
Limit and rollout switch wiring is in good condition and se-
curely
connected.
Restriction in duct work.
Dirty filter
Overfire
Dead blower.
Blocked duct work.
48