Toshiba MMU-P0121H Service Manual page 72

Check code
[8d]
Reduction of No. of
connected outdoor units
Is backup of outdoor unit
at server being completed?
NO
Is source power of outdoor unit
at server turned on?
YES
Is communication
cable connected correctly
between outdoor units?
YES
Is BUS communication
connector (CN601) of outdoor
unit at server connected?
YES
Check interface P.C. board.
( 1) How to clear the alarm
*
Set SW01/SW02/SW03 on interface P.C. board of the master outdoor unit to 2/16/1 respectively, and
push SW04 for 5 seconds.
(Display on the 7 segment display : [Er.] [CL])
1. Outdoor unit backup set up
2. Outdoor unit power supply
3. Connection error of communication cable between outdoor units
4. Connection error of BUS communication
5. Interface P.C. board error
YES
NO
NO
NO
3-69
Operation cause
Clear the alarm,and the operation starts. (
Turn on the power supply.
Modify connection of communication cable.
Modify connection of connector.
(BUS communication connector : CN601)
1)
*