Troubles And Causes - Toshiba Carrier MMK-UP0071HP-UL Owner's Manual

TROUBLES AND CAUSES

For contents of the outdoor unit, combinations, etc., refer to the owner's manual supplied with the outdoor
unit.
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 1 )
• 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 "
" TIMER" and "
an alarm sound.) (see page 11)
Poor cooling or heating performance
• Doors or windows are opened.
• The air lter 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
• 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.
29-EN
Carrier 1121250221.indb 29 Carrier 1121250221.indb 29
CAUTION
OPERATION" lamp lights up, and the
Preheat/Defrost" lamps blink alternately with
DRY mode.
– 29 –
Owner's Manual
9/26/22 11:16 AM 9/26/22 11:16 AM