Integrated Control - Lennox ML193UH030XE36B Installation Instructions Manual

Integrated Control

INTEGRATED CONTROL
(Automatic Hot Surface Ignition System)
RED LED
RECALL BUTTON
FIGURE 60
RED LED Flash Code
Off
Heartbeat
1
Continuous Rapid Flash
1
2
3
4
5
6
7
8
9
10
11
12
13
Note - 1
Note - 2
Note - 3
BLOWER OFF DELAY
2
No power to control or board fault detected
Normal Operation - Idle, Continuous Fan, Cool
Call For Heat / Burner Operation
Reverse Line Voltage Polarity
Improper Earth Ground
Burner failed to light, or lost flame during heat demand
Low Flame Signal - check flame sensor
Watchguard - burner failed to light, exceeded maximum number of retries or
recycles.
Not Used
Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer
than 3 minutes
Rollout Switch Open
Pressure Switch failed to close or opened during heat demand
Watchguard - Pressure Switch opened 5 times during one heat demand
Pressure Switch stuck closed prior to activation of combustion air inducer
Flame Sensed without gas valve energized
Low Line Voltage
A "Heartbeat" is indicated by a "Slow Flash" - 1 sec on 1 sec off, repeating
Error codes are indicated by a "rapid flash" - the LED flashes X times at ½ second on ½
second off, remains off for 3 seconds then repeats.
Last 10 error codes are stored in memory including when power is shut off to the
unit. - To recall, press and release button, most recent will be displayed first, LED off for 3
sec, then next error code is displayed, etc. To clear error codes, depress and hold button
longer than 5 seconds.
1/4" QUICK CONNECT TERMINALS
120HUM
LINE
XFMR
CIRC
EAC
NEUTRAL
HUM24
3/16" QUICK CONNECT TERMINALS
COOL
HEAT
FAN
PARK (no power)
FLAME / FS
24 COM
Diagnostic Codes / Status of Furnace
Notes
Page 39
TABLE 10
Humidifier 120VAC
120VAC
Transformer 120VAC
Indoor blower 120VAC
Indoor air quality accessory 120VAC
Common 120VAC
Humidifier 24VAC
Cooling tap 24VAC
Heating tap 24VAC
Continuous blower 24 VAC
Park terminal for speed taps
Flame Sense
Common 24VAC