Toshiba RAV-M242A, Service Manual

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Description

The OPERATION lamp blinks, indicating that power is turned
on.  If this happens, press the START/STOP button once,
and blink will stop.
Power failure also causes the same lamp to blink.

The compressor will not start while the compressor restart
prevention timer (three-minute timer) is actuated.
This applies also when power is turned on.

Fan speed is fixed at Low in the dry operation.

The compressor will not stop while the compressor on-hold
timer (two-minute timer) is actuated.

In the dry operation, the compressor goes on and off at
regular intervals, independent of the thermostat control.

• Operations which are not Deemed Trouble

Table 7-1

Operation of air-conditioner

When the POWER plug of the indoor unit is
inserted, the OPERATION lamp blinks.

Room temperature is in the range under which
the compressor is turned on, but the compressor
will not start.

Fan speed remains unchanged when the fan
speed button is operated in the dry operation.

Room temperature is in the range under which
the compressor is turned off, but the compressor
will not stop.

The compressor will not switch on or off even
when the thermostat control is operated in the
dry operation.

7.  TROUBLESHOOTING CHART

For RAS-13SK-E/RAV-M242A-E (or RAS-13SKX/RAV-M242A)

Troubleshooting Procedures :

• Following details of “What to be prechecked 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.

7-1. What to be Prechecked First

7-1-1. Power Supply Voltage

The power supply voltage must be from AC 198V to
264V.  If the power voltage is not within this range,
the air conditioner may not work normally.

7-1-2. Incorrect Cable Connection between

Indoor and Outdoor Units

The indoor unit is connected to the outdoor unit with
three cables.

Make certain that the terminals of indoor and outdoor
connectors have been connected properly by the same
numbers.

If not connected as specified, the outdoor unit won’t
operate normally.

7-1-3. Operations not Regarded as Failure

(Program operation)

In terms of the control of air-conditioner, the opera-
tions shown in Table 7-1 are made as a program op-
eration incorporated in a microcomputer.

If a claim is made about the operation, check it corre-
sponds to the contents in the table.

If it does, it is an indispensable operation for the con-
trol and maintenance of the air-conditioner but not a
failure of the units.