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<Self-diagnosis by check codes>
1. The self-diagnosis by the check codes is conducted under the block displays.
2. Remote controller key operation under the service mode is conducted by ON/OFF or TEMP. The remote
controller display by each key operation is varied as shown below. Two digit number is displayed in a hexa-
decimal number.
3. The self-diagnosis by the check codes is conducted with procedures shown below.
1) Enter the service mode and make sure the off timer display of the remote controller shows
“ ”
.
2) Operate the “ON/OFF” key and make sure the timer lamp on the display section is flashing (5 Hz).
3) At the same time, also make sure the operation lamp is also flashing. This shows that the protection
circuit on the indoor P.C. board is working.
4) Operate the TEMP.
key and make sure the remote controller display shows
“ ”
and flashing 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.
5) 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 typical protection circuits.
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Operating key
ON/OFF
TEMP. (Up)
TEMP. (Down)
“AUTO” LOUVER
“SET” LOUVER
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)