Troubles And Causes - Toshiba MMK-AP0074MHP-E Owner's Manual

High-Wall Type
SMMS High-Wall Type
13.

Troubles and Causes

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 controller display while using wired remote controller.
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.
• Stoppage of electric current.
• The batteries in the remote controller are exhausted.
• ON TIMER is set.
• Signal is sent to the follower indoor unit with the remote controller.
(see page 16)
• Operation of the indoor unit is limited by the wired remote controller 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 "
up, and the "
alternately with an alarm sound.) (see page 10)
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 ECO or
• 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.
31-EN
TIMER" and " Preheat / Defrost" lamps blink
OPERATION" lamp lights
DRY mode.
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Owner's Manual