Toshiba RAS-07EKH Service Manual page 35

<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 flashing
(5 Hz).
c) At the same time, also make sure the opera-
tion lamp is also flashing. 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 9-4
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)
d) Operate the TEMP.
remote control display shows "
ing of the operation lamp. If the operation lamp
is flashing, 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 is the next table. From "
check operations of protection circuits for each
block, and "
typical protection circuits.
– 35 –
key and make sure the
" and flash-
" up to "
" to " " check operations of the
key
"