Toshiba MMU-AP0072H2UL-1 Service Manual page 75

LED display on P.C. board (MCC-1570, 4-Way Casstte Type only)
1. D501 (Red)
• D501 goes on at the same time when the power supply is turned on.
(Goes on with operation of the main microprocessor)
• D501 flashes with 1-second interval (every 0.5 second) : When there is no EEPROM or write-in trouble
• D501 flashes with 10-seconds interval (every 5 second) : In DISP mode
• D501 flashes with 2-seconds interval (every 1 second) : During setting of function exchange
2. D403 (Red)
• D403 goes on when power is supplied to the remote control. (ON in hardware)
3. D503 (Yellow): Indoor/Outdoor central control
• D503 goes on for 5 seconds at the first half during communication with the central control.
• D503 flashes for 5 seconds with 0.2-second interval at the latter half during communication with
outdoor unit. (Goes on for 0.1 second, goes off for 0.1 second)
4. D504 (Green): Remote control communication
• D504 goes on for 5 seconds at the first half during communication with remote control.
(Header unit of group)
• In the group indoor unit, D504 flashes for 5 seconds with 0.2-second interval at the latter half during
communication between header and follower unit. (Goes on for 0.1 second, goes off for 0.1 second)
High wall type wireless remote control A-B selection>
Using 2 wireless remote controls for the respective air conditioners, when the 2 air conditioners are closely
installed.
Wireless remote control B setup
1. Push button on the indoor unit to turn the air conditioner ON.
2. Point the wireless remote control at the indoor unit.
3. Push and hold
CHK
"00" will be shown on the display.
4. Push during pushing
"B" will be shown on the display and "00" will be disappear and the air conditioner will turn OFF.
The wireless remote control B is memorized.
NOTE
• Repeat above step to reset wireless remote control to be A.
• The wireless remote controls do not display "A".
• The factory default of the wireless remote controls is "A".
button on the wireless remote control by the tip of the pencil.
.
CHK
"B" Display
"00" Display
(EEPROM)
PRESET FAN
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