Owner`s manual

High Wall Type
Owner’s Manual
–27–
10 Troubleshooting
For contents of the outdoor unit, combinations or other details, refer to the owner’s manual supplied with
the outdoor unit.
CAUTION
If any of the following conditions occur, stop the air conditioner immediately, set to off the main power
switch and contact the dealer:
• Switch operation are erratic.
• The main power fuse often blows out, or the circuit breaker is often activated.
• Foreign matter or water has fallen inside the air conditioner.
• Any other unusual condition is observed.
• Abnormal display appears on the remote control display while using wired remote control.
Before you ask for servicing or repairs, check the following points.
▼ Recheck
Inoperative
• The power main switch is turned off. (Indoor)
• The circuit breaker is activated to cut off the power supply.
• The main power fuse has blown out.
• The batteries in the remote control are exhausted.
• ON TIMER is set.
• Signal is sent to the follower indoor unit with the remote control. (See page
14)
• Operation of the indoor unit is limited by the wired remote control that is
controlling some other system.
(When signal is transmitted, warning sound (5 beeps) will be heard.)
• Disagreement in operation mode occurred.
(When the operation mode disagrees, the “ OPERATION” lamp lights
up, and the “ TIMER” and “ Preheat/Defrost” lamps blink
alternately with an alarm sound.) (see page 9)
Poor cooling or heating performance
• Doors or windows are opened.
• The air filter is clogged with dust.
• The louver is not at the correct position.
• The fan speed is set to low.
• The air conditioner is set in the QUIET or DRY mode.
• The set temperature is too high. (In cooling operation)
• The set temperature is too low. (In heating operation)
• (Only when the air is not cooled even during cooling operation)
When another indoor unit in the same system is heating.
▼ These are not failures.
The back of indoor unit is dewed.
• Dewdrops on the back of the indoor unit are automatically collected and drained out.
Indoor unit or outdoor unit makes a strange noise.
• When temperature sharply changes, the indoor or outdoor unit occasionally makes a strange noise
because of expansion/contraction of parts or change of refrigerant flow.
The room air is smelly.
A bad odour comes from the air conditioner.
• Smells impregnated in the wall, carpet, furniture, clothing, or furs, are coming out.
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