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18
Troubleshooting
Before requesting repair work
Check out the following points before requesting repair
work.
The scheduled operation is not performed even
though the set time is reached.
• The scheduled operation has not been set.
• A special holiday has been set.
The current clock time setting is blinking.
• There has been a prolonged power outage. Re-set
the current clock time and current day of the week.
There is no response when the keys are operated.
• The restriction has been set for the key operations.
Check the program.
The clock is not displayed when the power is turned
on.
• The timer operation function or follower remote
controller has been set.
• The setting for not displaying the clock has been
established.
Trouble diagnosis
<<Checks and inspections>>
• When trouble has occurred in the air conditioner, an
inspection code and the number of the indoor unit
concerned blink on the numeric display.
• Inspection codes are displayed only during operation.
• If the display has gone off, check the trouble by
following the steps in “Checking the trouble history”
below.
<<Checking the trouble history>>
• When trouble has occurred in the air conditioner, the
trouble history can be checked by following the steps
below. (Up to four events are stored in the trouble
history.)
• The trouble history can be checked whether the air
conditioner is running or shut down.
1 Push the button (42) and button (43)
together for at least 4 seconds.
• The numeric displays blink, and the servicing
display and inspect display light.
2 Push the TEMP or button (49).
• Each time one of these buttons is pushed, the
trouble history events are displayed in numerical
order.
• The “01” code on the numeric display indicates the
latest event, and “04” the earliest event.
* Do not push the button (41) since all the
trouble history events of the indoor units will be
deleted.
3 After checking the events, push the button
(43) to return to the original screen.
Concerning trouble occurring in the remote
controller
“ ”, “ ” and “ ” blink at the same time.
• This means that trouble has occurred on the remote
controller’s circuit board. Contact your dealer.
• Normal air conditioner operations are still possible, but
no scheduled operations can be performed.
<Caution> If the problem persists even after
checking out the above points, stop operating the air
conditioner, set the ground fault interrupter to off, and
give the model number and details of the symptoms to
your dealer. Do NOT attempt to remedy the
problem yourself due to the dangers involved.
Inspection code Address of indoor unit
where the trouble has
occurred
Inspection code
Address of indoor unit where
the trouble has occurred
Numerical order of
trouble history events
MB FRIGO Grupa d.o.o., Bani 81, 10010 Zagreb, www.toshiba.hr, e-mail: toshiba@mbfrigo.hr