Icm2 Motor With Vsp2−1 - Lennox G32V Series Service Literature

3− Variable Speed Blower Motor
To check−out the VSM blower and the blower control board,
begin with the ICM2 motorand follow the check−out procedure
as outlined. The ICM2 consist of a control module and motor.
The control module can be replaced separately from the motor
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.
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 SPEED CHECK−OUT
1 2 3 4 5 6
J46
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 speed.
HIGH SPEED CHECK−OUT
1 2 3 4 5 6
J46
6− Disconnect power to unit.
7− Connect voltage source as shown above.
8− Turn on power to unit. Blower should operate
at high speed.
HEATING SPEED CHECK−OUT
1 2 3 4 5 6
J46
9− Disconnect power to unit.
10−Connect voltage source as shown above.
11−Turn on power to unit. Blower should operate
at heating speed.
A kit is available from the Lennox parts center to use in testing the variable speed motor. The kit 70J11 includes a test plug
harness to facilitate ICM−2 check−out. Follow testing procedures outlined in the instructions provided with the kit.
The testing procedures are different than those listed above.
ICM−2 WITH VSP2
J46
1
13
1
7 8 9 10 11 12 13
7 8 9 10 11 12 13
7 8 9 10 11 12 13
if necessary. However, if the motor fails the motor/module as-
sembly must be replaced. To verify proper operation of the
blower control board, check the board as outlined in the trou-
bleshooting flowcharts on the previous page.
13
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.
LOW SPEED CHECK−OUT
1 2 3 4 5 6 7 8 9 10 11 12 13
J46
C
R
1− Disconnect power to unit.
2− Disconnect plug J46 from P46 located on the
blower control board.
3− Disconnect C and R from control board.
4− Connect voltage source as shown above.
5− Turn on power to unit. Blower should operate
at low speed.
HIGH SPEED CHECK−OUT
1 2 3 4 5 6 7 8 9 10 11 12 13
J46
C
R
6− Disconnect power to unit.
7− Connect voltage source as shown above.
8− Turn on power to unit. Blower should operate
at high speed.
HEATING SPEED CHECK−OUT
1 2 3 4 5 6 7 8 9 10 11 12 13
J46
C
R
9− Disconnect power to unit.
10− Connect voltage source as shown above.
11− Turn on power to unit. Blower should operate
at heating speed.
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