Icm−2 With Two Stage Variable Speed Control - Lennox G61MPV Service Manual

ICM−2 WITH TWO STAGE VARIABLE SPEED CONTROL
120V to the motor must not be interrupted. All connections for check out will be from the volt-
age source below (battery or 24V) to plug J46, after disconnecting from blower control board.
REMOVE PLUG FROM BOARD
CHECK−OUT PROCEDURE USING BATTERY
An ordinary 9 volt battery with maximum DC
20volts is recommended. A 9 volt battery will
last for about one day of normal operation.
LOW
COOL
SPEED
1 Disconnect power to unit.
2 Disconnect plug J46 from P46 located on the blower control board.
3 Connect voltage source as shown above.
4 Turn on power to unit. Blower should operate at low cool speed.
HIGH
COOL
SPEED
5 Disconnect power to unit.
6 Connect voltage source as shown above.
7 Turn on power to unit. Blower should operate at high cool speed.
LOW
HEAT
SPEED
8 Disconnect power to unit.
9 Connect voltage source as shown above.
10 Turn on power to unit. Blower should operate at low heat speed.
HIGH
HEAT
SPEED
11 Disconnect power to unit.
12 Connect voltage source as shown above.
13 Turn on power to unit. Blower should operate at high heat speed.
1
J46
J46
J46
J46
16
CHECK−OUT PROCEDURE USING 24V SOURCE
Unit transformer T1 with a maximum AC 30 volts
may be used in lieu of a battery. If transformer T1
is used, double check all wiring connections be-
fore placing unit back in operation.
C
LOW
COOL
SPEED
1 Disconnect power to unit.
2 Disconnect plug J46 from P46 located on the blower control board.
3 Connect voltage source as shown above.
4 Turn on power to unit. Blower should operate at low cool speed.
C
HIGH
COOL
SPEED
5 Disconnect power to unit.
6 Connect voltage source as shown above.
7 Turn on power to unit. Blower should operate at high cool speed.
C
LOW
HEAT
SPEED
8 Disconnect power to unit.
9 Connect voltage source as shown above.
10 Turn on power to unit. Blower should operate at low heat speed.
C
HIGH
HEAT
SPEED
11 Disconnect power to unit.
12 Connect voltage source as shown above.
13 Turn on power to unit. Blower should operate at high heat speed.
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R
J46
R
J46
R
J46
R
J46