Integrated Control - Lennox MERIT Series Installation Instructions Manual

LED
PUSH BUTTON
TWIN
BLOWER OFF
DELAY JUMPER
DIAGNOSTIC CODES
LED Status
No power to control or control
LED Off
harware fault detected.
LED On Normal operation.
Flame present with gas vavle
1 Flash
de-energized.
Pressure switch closed with com-
2 Flashes
bustion air inducer e-energized.
Pressure switch open with com-
3 Flashes
bustion air inducer energized.
4 Flashes Primary limit switch open.
5 Flashes Rollout switch open.
6 Flashes Pressure switch cycle lockout.
7 Flashes Lockout, burners fail to light.
Lockout, buners lost flame too
8 Flashes
many times.
9 Flashes Line voltage polarity incorrect.

INTEGRATED CONTROL

(Automatic Hot Surface Ignition System)
FIGURE 54
Description
Page 38
TERMINAL DESIGNATIONS
Humidifier (120VAC)
HUM
Input (120VAC)
LINE
Transformer (120VAC)
XFMR
Indoor Air Qality Accessory Air Cleaner (120VAC)
EAC
Blower - Cooling Speed (120VAC)
COOL
Blower - Heating Speed (120VAC)
HEAT
Dead terminals to park alternate spd taps
PARK
Continuous blower
CONT
Neutral terminals (120VAC)
NEUTRALS
Twinning Terminal (24VAC)
TWIN
Note - This control is equipped with a push button switch
for diagnostic code recall. The control stores the last 5
fault codes in non-volatile memory. The most recent fault
code is flashed first, the oldest fault code is flashed last.
There is a 2 second pause between codes. When the
push button switch is pressed for less than 5 seconds, the
control will flash the stored fault codes when the switch is
released. The fault code history may be cleared by press-
ing the push button switch for more than 5 seconds.