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Manual 2100-455A
Page 22 of 25
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.
TABLE 6
FAN BLADE DIMENSION
ledoMAnoisnemiD
LLA0.1
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