Maytag AFD25BCZX Series, Руководство по обслуживанию

Страница: 7 / 71

Component Testing
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
©2006 Maytag Services
16026312 7
Component Description Test Procedures
Overload / Relay
When voltage is connected and relay is
cool, current passes through relay to start
winding.
After a short time, current heats the
resistor in relay and resistance will rise
blocking current flow through relay.
Start winding remains in the circuit through
run capacitor.
Solid state relay plugs directly on
compressor start and run terminals. Relay
terminals 2 and 3 are connected within
relay. Run capacitor is connected to relay
terminal 3. L2 side of 120 VAC power is
connected to relay terminal 2. 1. Disconnect power to the refrigerator.
2. Remove relay cover and disconnect leads.
3. Check resistance across terminals 2 and 3 with an ohmmeter:
Normal = 3 to 12 ohms
Shorted = 0 ohms
Open = infinite ohms
Control board
See “Control Board” section for
troubleshooting information.
Evaporator fan
motor
Evaporator fan moves air across
evaporator coil and throughout refrigerator
cabinet.
1. Use Control board testing to check operation of motor.
2. If fan motor does not operate, check for voltage at motor leads.
3. Replace motor if power is present.
4. Replace Control board if no power.
Ice Box fan motor
Ice Box fan moves air across Ice Maker
and throughout refrigerator cabinet.
1. Use Control board testing to check operation of motor.
2. If fan motor does not operate check for voltage at motor leads.
3. Replace motor if power is present.
4. Replace Control board if no power.
Right Refrigerator
& Freezer light
switch Single pole, single throw switch completes
circuit for light when door is open. Check resistant across terminals.
Switch arm depressed
“C“ and ”NC” terminals Open
Switch arm up
“C“ and ”NC” terminals Closed
Ice maker water
valve
Controls water flow to the ice maker.
Controlled by ice maker.
See “Control Board” section for further
testing information. Check resistance across coil windings.
Evaporator heater
(defrost)
Activated when defrost thermostat control
board completes circuit through heater. Check resistance across heater.
To check defrost system :
1. Use Control Board testing to check operation of defrost heater.
2. If heater does not operate, check defrost thermostat to see if closed.
3. If no power to heater, replace control board.
Left Refrigerator
Light Switch Single pole, double throw switch
completes circuit for light when door is
open. Check resistant across terminals.
Switch arm depressed
“C” and “NC” terminals Open
“C” and ”NO” terminals Closed
Switch arm up
“C” and “NC” terminals Closed
“C” and “NO” terminals Open