American Standard UHMB060ACV3VB Series Service Facts page 50

Service Facts
DEFINITION:
The flame sense current is
less than 1 micro-amp dc
Correct flame
NO
sensor location
Replace flame
Check operation
sensor
50
8 Flash Fault LED
User Interface to
View number 1 of
User Interface
FLAME SNS?
electrical power to
Connect volt meter
leads in series with
Cycle power to
furnace and call
Is flame sensor
located correctly?
See figure
YES
Is flame current
measured less
YES
than 1.0 micro-
Flame sensor is
wiring and / or
Scroll through
Last 4 Faults
shows LO
Disconnect
the furnace
Meter must be set on
dc micro-amp scale
flame sensor
for heat
amp DC?
NO
good. Check
connections.
UHM-DHM-SF-1V-EN