S-15A Resistance Check; S-15B Capacitance Check - Amana AVXC20 Series Service Instructions Manual

SERVICING

S-15A RESISTANCE CHECK

HIGH VOLTAGE !
D ALL
ISCONNECT POWER BEFORE SERVICING OR
. M
INSTALLING ULTIPLE POWER SOURCES MAY BE
. F
PRESENT AILURE TO DO SO MAY CAUSE PROPERTY
,
DAMAGE PERSONAL INJURY OR DEATH
1. Discharge capacitor and remove wire leads.
D
ISCHARGE CAPACITOR THROUGH A
.
HANDLING
OHMMETER
TESTING CAPACITOR RESISTANCE
2. Set an ohmmeter on its highest ohm scale and connect the
leads to the capacitor -
A. Good Condition - indicator swings to zero and slowly
returns to infinity. (Start capacitor with bleed resistor will
not return to infinity. It will still read the resistance of the
resistor).
B. Shorted - indicator swings to zero and stops there -
replace.
C. Open - no reading - replace. (Start capacitor would read
resistor resistance.)

S-15B CAPACITANCE CHECK

Using a hookup as shown below, take the amperage and volt-
age readings and use them in the formula:
Capacitance (MFD) = 2650 X Amperage
D
ISCHARGE CAPACITOR THROUGH A
.
HANDLING
34
WARNING
.
WARNING
20 30 OHM
TO RESISTOR BEFORE
CAPACITOR
Voltage
WARNING
20 30 OHM
TO RESISTOR BEFORE
VOLTMETER
AMMETER
TESTING CAPACITANCE
AVPVC with AVXC20 Condenser and CTK04 Communicating
Themostat
The AVPVC air handler/modular blower matched with a AVXC20
condensing unit and CTK04 communicating thermostat constitute
a network. The three components, or subsystems, making up the
system communicate with one another with information passed
between all three components. This leads to a somewhat non-
traditional manner in which the system components receive com-
mands for system operation. All system commands are routed
from the component through the network to the appropriate desti-
nation component.
NOTE: The individual subsystems will cease operation if the
request for operation is NOT refreshed after 5 minutes. This is a
built-in safe guard to prevent the possibility of runaway opera-
tion.
1.0 Cooling Operation - Variable Speed Cooling
1.1 The CTK0* thermostat sends a request for cooling through
the network to the unitary (UC) control in the condenser.
The UC control receives the command and processes any
compressor and fan delays.
1.2 The UC control sends a request for fan speed to the air
handler/modular blower. The blower energizes the ECM
blower motor at the appropriate speed.
1.3 The condenser operates the compressor and condenser
fan motor at the appropriate speeds.
1.4 The system operates at cooling.
1.5 Once the thermostat demand is satisfied, the CTK0*
thermostat commands the UC control to end cooling
operation. The condenser stops the compressor and
condenser fan motor. The UC control continues providing
a fan request until any cooling blower OFF delays have
expired.
15 AMP
FUSE
CAPACITOR