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Manual 2100-455M 

Page 

23 of 28

  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.

This unit was charged at the factory with the quantity of 
refrigerant listed on the serial plate.  AHRI capacity and 

efficiency ratings were determined by testing with this 
refrigerant charge quantity.

The following pressure tables show nominal pressures 

for the units.  Since many installation specific situations 
can affect the pressure readings, this information should 

only be used by certified technicians as a guide for 
evaluating proper system performance.  They shall not 
be used to adjust charge.  If charge is in doubt, reclaim, 
evacuate and recharge the unit to the serial plate charge.

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.

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.

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