Toshiba RAV-M242A-E Service Manual page 13

<Self-diagnosis by check codes>
1) The self-diagnosis by the check codes is con-
ducted under the block displays of item b)-e).
Operating key
ON/OFF
TEMP . (Up)
TEMP . (Down)
"AUTO" LOUVER
"SET" LOUVER
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.
Table 7-4
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)
– 13 –
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.
Indication after operation
"
"
d) Operate the TEMP .
the remote control display shows
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 .
so that the display is increased one by one
to continue checks by the self-diagnosis
as shown in the next table.
From " "
of protection circuits for each block, and
" " to "
cal protection circuits.
key and make sure
"
up to " " check operations
" check operations of the typi-
"
and
key