Sharp AY-A079E Service Manual page 20

Split system room air conditioners
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AY/AE-A079E
AY/AE-A099E
The room is not heated at all or not heated.
The compressor does not operate.
Select HEAT MODE with remote controller.
And then start operation.
Push the button of "TEST RUN" on the
indoor unit, and wait 3 minutes.
Using a tester, measure voltages at the
terminals on the terminal board.
between terminal "N" and
"1" of the terminal board the
power supply voltage ?
between terminal "N" and
"2" of the terminal board the
power supply voltage ?
between terminal "N" and
"3" of the terminal board the
power supply voltage ?
The control circuit board is normal.
Refrigerant may be leaked.
The running capacitor may be defective.
The outdoor fan motor may be defective.
The outdoor fan motor capacitor may be defective.
The compressor may be defective.
The thermistor may be defective.
Is the voltage
YES
Is the voltage
YES
Is the voltage
YES
NO
NO
NO
Replace the PWB ass'y with a new one.
20
NO

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