– 99 –
3. The outdoor unit does not operate (remote control command can be received).
YES
YES
YES
NO
YES
YES
YES
NO
NO
NO
Does LD701 light when the heating
operation is done with the tempera-
ture set to 32¡C using the remote
controller?
Does LD701 light when the cooling
operation is done with the timpera-
ture set to 16¡C using the remote
controller
Are indoor/outdoor communication
signals superimposed on the DC 35V
of connection cable C, D?
Is an indoor transmiting signal gener-
ated at the collector of Q801?
Does LD301 of outdoor electrical
parts blink 9 times?
Is LD701 turned OFF within several
ten seconds after it is lit?
Perform a final check of operation.
Check the electrical parts in the out-
door unit and repair defective parts.
Check the electrical parts in the out-
door unit and repair defective parts
(around the outdoor interface trans-
mitting circuit).
Check the indoor interface transmit-
ting circuit and repair defective parts.
Check the electrical parts in the out-
door unit and repair defective parts
(around the outdoor interface trans-
mitting circuit).
Check the heat exchanger thermistor
and replace if it is defective.
〈Normal value〉 20¡C ➞ approx.12.5Ω
25¡C ➞ approx.10k Ω
30¡C ➞ approx. 8k Ω
Check the room temperature thermis-
tor and replace if it is defective.
〈Normal value〉 20¡C ➞ approx.12.5Ω
25¡C ➞ approx.10k Ω
30¡C ➞ approx. 8k Ω
NO
36kHz approx. 2Vp-p
Approx.
35V
0V
36kHz approx. 2Vp-p
transmitting
Approx.
4V
0V
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