Toshiba RAV-M242A, Service Manual

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3) The self-diagnosis by the check codes is con-
ducted with procedures shown below.
a) Enter the service mode and make sure the
off timer display of the remote control shows
.
b) Operate the “ON/OFF” key and make sure
the timer lamp on the display section is
blinking (5Hz).
c) At the same time, also make sure the OP-
ERATION lamp is also blinking.
This shows that the protection circuit on the
indoor P.C. board is working.
2) Remote control key operation under the ser-
vice mode is conducted by ON/OFF or TEMP.
The remote control display by each key op-
eration is varied as shown below.
Two digit number is displayed in a hexadeci-
mal number.
<Self-diagnosis by check codes>
1) The self-diagnosis by the check codes is con-
ducted under the block displays of item b)-e).
Indication after operation
1 is added to data before operation.
(Example)
1 is subtracted from data before operation.
(Example)
10 is subtracted from data before operation.
(Example)
Data before operation is directly transferred.
(Example)
Operating key
ON/OFF
TEMP. (Up)
TEMP. (Down)
“AUTO” LOUVER
“SET” LOUVER
Table 7-4
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d) Operate the TEMP. key and make sure
the remote control display shows and
blinking of the OPERATION lamp.
If the operation lamp is blinking, it shows
the protection circuits for connecting cable
is working or thermal fuse is blown.
e) In the same way, operate the TEMP. key
so that the display is increased one by one
to continue checks by the self-diagnosis
as shown in the next table.
From up to check operations
of protection circuits for each block, and
to check operations of the typi-
cal protection circuits.
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