AE-X15PU
3 – 7
5. Louvers do not move
6. There is noise in TV/radio
7. Malfunction occurs
8. Compressor does not start
Main cause
Inspection method
Normal value/condition
Remedy
Caught in sliding section.
Operate to see if louvers are
caught in place.
Louvers should operate smoothly.
Remove or correct catching sec-
tion.
Disconnected connector
Inspect connectors.
Connectors or pins should not be
disconnected.
Install correctly.
Contact of solder on PWB
(connector section on PWB)
Check visually.
There should not be solder con-
tact.
Correct contacting section.
Main cause
Inspection method
Normal value/condition
Remedy
Grounding wires not connected
properly.
Check grounding wire connec-
tions.
Grounding wires should be con-
nected properly.
Connect grounding wires prop-
erly.
TV/radio is placed too close to
outdoor unit.
Check distance between TV/radio
and outdoor unit.
If TV/radio is placed too close, it
may become affected by noise.
Move TV/radio away from outdoor
unit.
Other than above.
Check for radio wave interfer-
ence.
Main cause
Inspection method
Normal value/condition
Remedy
Malfunction caused by noise.
Check for radio wave interfer-
ence.
Main cause
Inspection method
Normal value/condition
Remedy
Erroneous inter-unit connection.
Check wiring between indoor and
outdoor units.
Terminal board 1-N: 230 VAC, 60
Hz
Terminal board 2: serial signal
Correct wiring.
.
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Dried-up electrolytic capacitor.
Check electrolyt
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ectrolytic capacitor.
Blown outdoor unit fuse.
Check 20-A fuse.
Fuse should not be blown.
Replace fuse/diode bridge.
Replace fuse.
Replace outdoor unit PWB
assembly.
Power supply voltage is too low.
Measure power supply voltage
during startup.
230
±
10 VAC, 60 Hz
Make sure that power supply volt-
age is 180 V or higher.
Compressor lock.
Supply current and touch com-
pressor cover (sound absorbing
material) to check if operation
starts.
Compressor should start nor-
mally.
Apply external impact to com-
pressor.
Replace compressor.
9. Operation stops after a few minutes and restarts, and this process repeats
CAUTION: If fuse FU1/FU5 (outdoor unit control circuit board) is blown, be careful of charging voltage in inverter electrolytic capacitor C8, C9.
To discharge stored electricity, unplug the power cord and connect the plug of a soldering iron (230VAC, 30W) between the positive and
negative terminals of inverter electrolytic capacitor C8, C9.
Main cause
Inspection method
Normal value/condition
Remedy
Dried-up electrolytic capacitor.
Measure 290-VDC line voltage.
250 V or higher.
Replace electrolytic capacitor.
Layer short-circuit in expansion
valve coil.
Measure resistance.
46
±
3
Ω
in each phase (at 20
℃
)
Replace coil.
