24
Troubleshooting
The following symptoms do not indicate malfunction.
Symptom
Cause
POWER indicator blinks before the unit is
switched on.
• This is a preliminary step in preparation for the
operation when the ON timer has been set.
• When ON Timer is set, the unit may start earlier (up
to 30 minutes) before the actual set time in order to
achieve the desired temperature on time.
TIMER indicator is always on.
• The timer setting repeats daily once set.
Operation is delayed a few minutes after
restarting.
• The delay is a protection to the unit’s compressor.
Indoor fan stops occasionally during automatic
fan speed setting.
• This helps to remove the surrounding odour.
The room has a peculiar odour.
• This may be due to damp smell emitted by the wall,
carpet, furniture or clothing.
Cracking sound during operation.
• Changes of temperature caused the expansion/
contraction of the unit.
Water fl owing sound during operation.
• Refrigerant fl ow inside the unit.
Mist emerges from indoor unit.
• Condensation effect due to cooling process.
Outdoor unit emits water/steam.
• Condensation or evaporation occurs on pipes.
Discoloration of some plastic parts.
• Discoloration is subject to material types used in plastic
parts, accelerated when exposed to heat, sun light, UV
light or environmental factor.
Check the following before calling for servicing.
Symptom
Check
Operation in COOL mode is not working
effi ciently.
• Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the fi lters.
• Clear any obstruction at the air inlet and air outlet
vents.
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• Close the front panel properly.
Remote control does not work.
(Display is dim or transmission signal is
weak.)
• Insert the batteries correctly.
• Replace weak batteries.
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• Check if timers have been set.
The unit does not receive the signal from the
remote control.
• Make sure the receiver is not obstructed.
• Certain fl uorescent lights may interfere with signal
transmitter. Please consult authorised dealer.
C8041-3890 24
Summary of Contents for RS-U9YW
Page 2: ...2 8 O PE N 2 3 1 1 2 AAA R03 3 A 1 2 SET C8041 3890 2...
Page 4: ...4 C8041 3890 4...
Page 5: ...ON Ni Cd ELCB RCD ELCB BS C8041 3890 5 5...
Page 10: ...19 C8041 3890 10 10 9 19 15 8 30 1 20 1 2 3 2 21 9...
Page 11: ...POWER ON ON 30 TIMER COOL C8041 3890 11 11...
Page 12: ...5 OFF ON COOL 15 COOL 8 C 14 4 F C8041 3890 12 12 5...
Page 14: ...Pb C8041 3890 14 14...
