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AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
For AH-N56DP2 / AU-N56DP2
The room is not cooled at all
or not cooled.
The compressor does not operate.
Measure resistances of TH1 and TH2.
The control circuit is normal.
The compressor may be defective.
The running capacitor may be
defective.
Refrigerant may be leaked.
The outdoor fan motor may be
defective.
The outdoor fan motor capacitor
may be defective.
Push the button " AUX." on
the indoor unit, for more than 5 sec.
Is the voltage
between terminal of black
lead wire on the relay in the outdoor unit
and terminal "N" on the terminal board the
power suuply voltage ?
Are the resistances
conformed Fig. 1 ?
Replace the thermistor
ass'y with a new one.
NO
YES
YES
NO
Replace the PWB ass'y with a new one.
Using a tester, measure voltage at
the terminals on the terminal board.
Replace the relay in the outdoor unit with
a new one.
Is the voltage
between terminal " N " and
" 2 " in the outdoor unit
the power supply
voltage ?
YES
NO
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