2. Outdoor unit does not operate (but receives remote infrared signal)
Does LD303 switch off
several second after it lights?
Perform final operation check.
Check outdoor electrical parts,
and repair any defective parts.
Check outdoor electrical parts,
and repair any defective parts
(around the outdoor interface
transmitting circuit).
Check the indoor interface
transmitting circuit. Replace
IC801.
Check outdoor electrical parts,
and repair any defective parts
(around the outdoor interface
transmitting circuit).
Is the indoor transmitting signal
being generated at Q801
s
collector?
No
No
Yes
Yes
0V
Approx.
35V
38kHz Approx. 2Vp-p
Transmission waveform
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