SERVICING
61
Status Light
Equipment Status
Check
On
Normal Operation
Off
No Power or
Internal Control Fault
Check Input Power,
Check Fuse on Control,
Replace Control
1 Blink
Ignition Failure,
Open Rollout Switch,
or Open Aux. Limit
Switch
Check Gas Flow,
Check Gas Pressure,
Check Gas Valve,
Check Flame Sensor,
Check Flame Rollout,
Check Aux. Limit.
2 Blinks
Pressure Switch Open Check Pressure Switch
3 Blinks
Pressure Switch
Closed
Check Pressure Switch
4 Blinks
Open Main Limit
Switch
Main Limit Switch Open
5 Blinks
False Flame Sensed
Sticking Gas Valve
6 Blinks
Compressor Output
Delay
3 Minute Compressor
Anti-Cycle Timer
B1809918 Ignition Board Fault Codes
NOTE:
The flash rate is 0.25 seconds on, 0.25 seconds
off, with a 2-second pause between codes.
S-314 CHECKING FLAME SENSOR
A flame sensing device is used in conjunction with the ignition
control module to prove combustion. If a microamp signal is
not present the control will de-energize the gas valve and
"retry" for ignition or lockout.
DSI Direct Spark Ignition Systems
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 terminal FS of the
ignition control module.
Flame
Sensor
Flame Sensor
2. Connect a microamp meter in series with this wire and
terminal FS.
3. Be sure the negative side of the meter is to the wire and
the positive of the meter is to terminal FS.
4. Turn on Power.
WARNING
Line Voltage now present.
5. With Power ON, Place the unit into a heating cycle.
6. As soon as flame is established a microamp reading
should be evident once proof of flame (microamp reading)
is established, the hot surface ignitor will be de-ener-
gized.
7. The nominal microamp reading is 4 microamps.
8. If the microamp current is less than 0.5 microamp the
control will lockout and flash a code of 1 flash after
attempting to reestablish flame sense.
9. If the microamp reading is less than the minimum speci-
fied, check for high resistance wiring connections, the
distance (3/16") between the sensor and burner, flame
sensor connections, dirty flame sensor or poor ground-
ing.
10. If 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. Do not use sand paper, the silicone
in sand paper will further contaminate the sensor.
