Bard CH5S1 R-410A, Compressor Solenoid, Fan Blade Setting Dimensions, Removal Of Fan Shroud

COMPRESSOR SOLENOID

A nominal 24-volt direct current coil activates the internal compressor solenoid. The input control circuit voltage must be 18 to 28 volt ac. The coil power requirement is 20 VA. The external electrical connection is made with a molded plug assembly (PN 029-0311-00). This plug contains a full wave rectifier to supply direct current to the unloader coil.

Compressor Solenoid Test Procedure – If it is suspected that the unloader is not working, the following methods may be used to verify operation.

1.Operate the system and measure compressor amperage. Cycle the compressor solenoid on and off at ten-second intervals. The compressor amperage should go up or down at least 25 percent.

2.If step one does not give the expected results, shut unit off. Apply 18 to 28 volt ac to the solenoid molded plug leads and listen for a click as the solenoid pulls in. Remove power and listen for another click as the solenoid returns to its original position.

3.If clicks can’t be heard, shut off power and remove the control circuit molded plug from the compressor and measure the solenoid coil resistance. The resistance should be 32 to 60 ohms depending on compressor temperature.

4.Next, check the molded plug.

Voltage check: Apply control voltage to the plug wires (18 to 28 volt ac). The measured dc voltage at the female connectors in the plug should be around 15 to 27 vdc.

Resistance check: Measure the resistance from the end of one molded plug lead to either of the two female connectors in the plug. One of the connectors should read close to zero ohms, while the other should read infinity. Repeat with other wire. The same female connector as before should read zero, while the other connector again reads infinity. Reverse polarity on the ohmmeter leads and repeat. The female connector that read infinity previously should now read close to zero ohms.

Replace plug if either of these test methods does not show the desired results.

FAN BLADE SETTING DIMENSIONS

Shown in Figure 13 are the correct fan blade setting dimensions for proper air delivery across the outdoor coil.

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions below be checked and blade adjusted in or out on the motor shaft accordingly.

FIGURE 13

FAN BLADE SETTING

TABLE 6

FAN BLADE DIMENSION

Model	Dimension A
ALL	1.0

REMOVAL OF FAN SHROUD

1.Disconnect all power to the unit.

2.Remove the screws holding both grilles, one on each side of unit, and remove grilles.

3.Remove screws holding fan shroud to condenser and bottom. Nine (9) screws.

4.Unwire condenser fan motor.

5.Slide complete motor, fan blade, and shroud assembly out the left side of the unit.

6.Service motor/fan as needed.

7.Reverse steps to reinstall.

R-410A

REFRIGERANT CHARGE

The correct system R-410A charge is shown on the unit rating plate. Optimum unit performance will occur with a refrigerant charge shown on the unit serial plate.

If correct charge is in doubt, recover the refrigerant and recharge per the charge on the unit rating plate. See Table 7 for proper subcooling levels for evaluation of proper charge.

Manual	2100-455A
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