I found the manual to be clear concise and complete. It was of immense assistance when removing the unit as the unit was over 22 years old and the wiring diagram was unobtainable from the manufacturer. The exploded drawings were clear as were the instructions and labels.
Very pleased with the quality of the scan. No complaints whatsoever.
Text excerpt from page 22 (click to view)
RI/RO-189W RI/RO-249W
For RI-189W/RO-189W
CHARACTERISTIC OF TH1 & TH2 K
The room is not cooled at all or not cooled. The compressor does not operate.
180 160 140
Push the button "TEST RUN" on the indoor unit, and wait 3 minutes.
120 100 80
Using a tester, measure voltage at the terminals on the terminal board.
60 40 20 0 -10 0 10 20 Fig. 1
10�C 30K
30 40�C
Is the voltage between terminal "N" and "1" of the terminal board the power supply voltage ?
NO
Replace the PWB ass'y with a new one. YES
Measure resistances of TH1 and TH2.
Are the resistances conformed Fig. 1 ?
NO
YES
Replace the thermistor ass'y with a new one.
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.
