Bard CH5S1 Manuel D’Utilisation

Manual 2100-455M 

Page  28 of 28

To replace the control module for the GE variable-speed indoor blower 
motor you need to take the following steps:
 

1.  You MUST have the correct replacement module.  The controls are 

factory programmed for specific operating modes.  Even though they look 
alike, different modules may have completely different functionality.

2.  Begin by removing AC power from the unit being serviced.  Do Not 

woRK oN tHE MotoR wItH AC PowER APPLIED.  To avoid 
electric shock from the motor’s capacitors, disconnect power and wait at 
least 5 minutes before opening motor.

 

3.  It is not necessary to remove the motor from the blower assembly, nor 

the blower assembly from the unit.  Unplug the two cable connectors to the 
motor control assembly.  There are latches on each connector.  Do Not 
PuLL oN tHE wIRES.  The plugs remove easily when properly released.

 

4.  Locate the screws that retain to the motor control bracket to the sheet 

metal of the unit and remove them.  Remove two (2) nuts that retain 
the control to the bracket and then remove two (2) nuts that retain sheet 
metal motor control end plate.  Refer to Figure 14.

 5. 

Disconnect the three (3) wires interior of the motor control by using 

your thumb and forefinger squeezing the latch tab and the opposite side 
of the connector plug, gently pulling the connector.  Do Not PuLL oN 
tHE wIRES, gRIP tHE PLug oNLy.  Refer to Figure 14.

 

6.  The control module is now completely detached from the motor.  

Verify with a standard ohmmeter that the resistance from each motor 
lead (in the motor plug just removed) to the motor shell is >100K ohms.  
Refer to Figure 15.  (Measure to unpainted motor end plate.)  If any 
motor lead fails this test, do not proceed to install the control module.  
tHE MotoR IS DEFECtIvE AND MuSt BE REPLACED.  
Installing the new control module will cause it to fail also.

 

7.  Verify that the replacement control is correct for your application.  

Refer to the manufacturer’s authorized replacement list.  uSINg tHE 
wRoNg CoNtRoL wILL RESuLt IN IMPRoPER oR No 
BLowER oPERAtIoN.  Orient the control module so that the 3-wire 
motor plug can be inserted into the socket in the control.  Carefully insert 
the plug and press it into the socket until it latches.  A SLIgHt CLICK 
wILL BE HEARD wHEN PRoPERLy INSERtED.

 

8.  Reverse the steps #5, 4, 3 to reconnect the motor control to the 

motor wires, securing the motor control cover plate, mounting the 
control to the bracket, and mounting the motor control bracket back 
into the unit.  MAKE SuRE tHE oRIENtAtIoN you SELECt 
FoR REPLACINg tHE CoNtRoL ASSuRES tHE CoNtRoL'S 
CABLE CoNNECtoRS wILL BE LoCAtED DowNwARD 
IN tHE APPLICAtIoN So tHAt wAtER CANNot RuN 
DowN tHE CABLES AND INto tHE CoNtRoL.

OvErtigHtEn tHE BOLtS.
 

9.  Plug the 16-pin control plug into the motor.  The plug is keyed.  

Make sure the connector is properly seated and latched.

 

10. Plug the 5-pin power connector into the motor.  Even though the 

plug is keyed, oBSERvE tHE PRoPER oRIENtAtIoN.  Do Not 
FoRCE tHE CoNNECtoR.  It plugs in very easily when properly 
oriented.  REvERSINg tHIS PLug wILL CAuSE IMMEDIAtE 
FAILuRE oF tHE CoNtRoL MoDuLE.

 11. 

Final installation check.  Make sure the motor is installed as follows:

 

 

a. Motor connectors should be oriented between the 4 o’clock   

 

 

and 8 o’clock positions when the control is positioned in its    

    final location and orientation.
 

 

b. Add a drip loop to the cables so that water cannot enter the    

 

 

motor by draining down the cables.  Refer to Figure 16.

The installation is now complete.  Reapply the AC power to the HVAC 
equipment and verify that the new motor control module is working 
properly.  Follow the manufacturer’s procedures for disposition of the 
old control module.

Motor

Motor OK when

R > 100k ohm

ECM 2.0

Only remove

Hex Head Bolts

Connector Orientation

Between 4 and 8 o'clock

Drip Loop

Back of

Control

Figure 5

Winding Test

Figure 4

Note:              

Use the shorter 

bolts and 

alignment pin 

supplied when 

replacing an 

ECM 2.0 

control.

Figure 3

ECM 

2.3/2.5

Power Connector

(5-pin)

Control Connector

(16-pin)

Hex-head Screws

Motor Connector

(3-pin)

Motor Connector

(3-pin)

Control Disassembly

Drip Loop

Push until

Latch Seats

Over Ramp

From Motor

Circuit

Board

Figure 15

Figure 14

Figure 16