Toshiba RAV-M240A-E Service Manual page 17

<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
(5 Hz).
c) At the same time, also make sure the OP-
ERATION lamp is also blinking. This shows
that the protection circuit on the indoor PC
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 hexadecimal num-
ber.
Table 8-4
Indication after operation
1 is added to data before operation.
(Example)
1 is subtracted from data before operation.
(Example)
10 is added to data before operation.
(Example)
Data before operation is directly transferred.
(Example)
d) Operate the TEMP.
remote control display shows "
ing of the OPERATION lamp. If the operation
lamp is blinking, it shows the protection cir-
cuits for connecting cable is working or ther-
mal fuse is blown.
e) In the same way, operate the TEMP .
that the display is increased one by one to
continue checks by the self-diagnosis as
shown is the next table. From "
check operations of protection circuits for each
block, and "
the typical protection circuits.
– 17 –
key and make sure the
" and blink-
key so
" up to "
" to " " check operations of
"