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Check At Main Power-On - Toshiba MMY-MUP0801HT8P-TR Service Manual

Air conditioner multi type, super modular multi system-u smms-u, outdoor
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7-3. Check at Main Power-on

After turning on the main power of the indoor units and outdoor unit in the refrigerant line to conduct a test
operation, check the following items in each outdoor and indoor unit.
(After turning on the main power, be sure to check in order: indoor unit outdoor unit.)
<Check on the outdoor unit>
(1) Check that all the rotary switches, SW01, SW02, and SW03, on the interface PC board of the header unit
are set to "1."
(2) If another check code is displayed on the 7-segment display [B], remove the cause of the problem referring
to Section, "8. TROUBLESHOOTING".
(3) Check that "L08" is displayed on the 7-segment display [B] on the interface PC board of the header unit.
(L08: Indoor address not set up)
(If the address setup operation has already been completed during servicing, etc., the above check code is
not displayed, and only "U1" is displayed on the 7-segment display [A].)
Interface P.C. board
Push switch
SW04
7-segment
display [A]
SW01
Rotary switches
- 119 -
SW05
SW06
7-segment
display [B]
SW02
SW03

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