PACD011001C2 Test Operation
Test Operation UM Combination “MA1R Series” Using R-407C 471
1.8 Sequential Start
„
Separates path timing of commercial power supply compressors by 3 seconds each in order to prevent
overcurrent when more than 1 compressor are to be started at the same time.
„
Wiring system enables sequential start of up to 10 outdoor units.
If you want to carry out sequential start, connect outdoor unit - outdoor unit transmission wiring as shown
below.
The outdoor unit PC board (EC) is factory set to “sequential start ON.”
In the case of power supply in the same line
(8. 10HP outdoor unit)
Power supply
Power supply
Power supply Power supply
(System 8)
(System 1)
(System 7) (System 6) (System 5) (System 4) (System 3)
Power supply
MX1R Series
MA1R Series
Master Sub
Power supply
(System 2)
Master Sub
Wiring between outdoor unit
(VL123)
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