Table of Contents
Advertisement
DEFINITION
RECYCLE Lock Out = 10 recycles within a single
call for heat. Lockout period is for one hour.
Flame is sensed & then lost
Turn all gas
appliances on
Measure flame current. Is
flame current greater
than 0.75 micro-amp?
(0.75-3 µA = Normal)
NO
Possible Causes
Dirty Sensor
Dirty burners
Poor grounding
Sensor loca on
Wire connec ons
DEFINITION
st
1
Stage Gas Valve not energized when it should
be 10 mes within the same call for heat .
24VAC not sensed on MVL 10 mes
S8XB-SVX001-1C-EN
2.2 Fault Code
Disconnect electrical
power to furnace.
Connect manometer
to manifold pressure
connector
NO
Cycle power to
furnace and call for
st
1
stage heat
Is manifold pressure
~1.7"WC (NG)
YES
~6.0" WC (LP)
**
YES
Possible Causes
Plugs
Blower door
Wind gust
Power interrupt
Possible Causes
Plugs
Blower door
Wind gust
Power interrupt
2.3 Fault Code
Replace IFC
Adjust manifold gas pressure to
~1.7"WC (NG)
NO
~6.0" WC (LP)
Check opera on
**
Is minimum outlet
gas manifold
YES
pressure
maintained?
NO
Disconnect electrical
power to furnace.
Connect manometer to
inlet gas pressure
connector
Cycle power to
furnace and call for
st
1
stage heat
Is minimum inlet
gas manifold
YES
NO
pressure
maintained?
T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
S8B1/S8X1 manifold pressure
~3.5" WC (NG)
~10" WC (LP)
Correct incoming
gas supply pressure
63
Advertisement
Table of Contents
