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Toshiba RAS-07YA-E RAS-10YK-E Manual

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9. TROUBLESHOOTING CHART
TROUBLESHOOTING PROCEDURES :
• Following details of “What to be pre-checked first”, make sure of the basic items.
• When there is no trouble corresponding to above, check in detail the faulty parts following “How to judge
faulty parts by symptoms” later.
9-1. What to be Prechecked First
9-1-1. Power Supply Voltage
The line voltage must be AC 220–240V (220V for RAS-07YKX-T, RAS-10YKX-T).
If the line voltage is not within this range, this air conditioner may not work normally.
9-1-2. Incorrect Cable Connection between Indoor and Outdoor Units
The indoor unit is connected to the outdoor unit with 3 cables. Make certain that the indoor and outdoor units
have been connected properly, with terminals assigned the same numbers wired to each other. If the connectors
are not connected as specified, the outdoor unit will not operate normally.
9-1-3. Misleading but Good Operations (Program Controlled Operation)
The microcomputer performs the operations listed in Table 9-1-1 to control the air conditioner. If a claim is made
on the operation, check whether it corresponds to the contents in the Table 9-1-1. If it does, it is an indispensable
operation for the control and maintenance of the air conditioner: it is not a failure of the unit.
Table 9-1-1
No. Operation of air conditioner Description
1
When the power plug or the power
cord of the indoor unit is inserted,
the OPERATION lamp on the
setting indication part blinks.
The OPERATION lamp blinks, indicating that power is turned on.
If this happens, push the START/STOP button once to cause the lamp to stop
blinking. A power outage also causes the lamp to blink.
2
Fan speed remains unchanged in
the dry mode.
Fan speed is automatically controlled in the dry mode.
3
The compressor will not switch on
or off even when the thermo. control
is operated in the dry operation.
In the dry mode, the compressor goes on and off at regular intervals,
independent of the thermo. control.
4
Compressor does not work though
room temperature is in the range of
turning the compressor on.
Compressor does not work while the compressor restart delay (3-min.) timer
is active. The same is true after power is turned on, as the time is still active.
5
During automatic operation, the
operation mode changes.
After selection of the cooling and dry operation, the operation mode is
selected again when the compressor off mode continues for 15 min.
according to the room temperature. And after selection of the dry operation,
the condition of the room temperature which is Room temp. >Set temp.+1
and which is Room temp.<Set temp.–4 continues for 15 min., the operation
mode is selected again.
6
When the power is turned on, the
operation starts automatically.
When the auto restart controlling is selected, the operation is performed
automatically in the previous operation mode after the power supply has
been turned on.
… 33 …


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