SERVICING
41
MEMORY CHIPS (COMFORTBRIDGE™
FURNACE ONLY)
On a ComfortBridge™ furnace using the shared data
memory chip is a “last resort.” The CoolCloudHVAC™ App
should be used to populate shared data to the control via
the “Shared Data” menu under Furnace tab.
CHECKING FLAME SENSOR
A flame sensing device is used in conjunction with the
ignition control module to prove combustion. If proof of
flame is not present the control will de-energize the gas
valve and “retry” for ignition or lockout.
WARNING
High Voltage!
Disconnect all power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do
so may cause property damage, personal
injury or death.
1.
Disconnect the flame sensor wire from the sensor.
2. Connect a micro-amp meter in series with this wire and
the sensor terminal.
3.
Be sure the positive side of the meter is to the flame
sensor wire and the negative side of the meter is to
sensor terminal.
WARNING
Line voltage now present
4. Place the unit into a heating cycle.
5.
As soon as flame is established a micro-amp reading
should be evident once proof of flame (micro-amp
reading) is established, the hot surface ignitor will be
de-energized.
6. The Integrated Ignition controls will have 1 to 4 micro-
amps. If the micro-amp reading is less than the minimum
specified, check for high resistance wiring connections,
sensor to burner gap, dirty flame sensor, or poor
grounding.
7. If absolutely no reading, check for continuity on all
components and if good - replace ignition control module.
NOTE: Contaminated fuel or combustion air can
create a nearly invisible coating on the flame
sensor. This coating works as an insulator
causing a loss in the flame sense signal. If
this situation occurs the flame sensor must be
cleaned with steel wool.
