Multi-Zone Technical Overview

REFERENCES
PAGE 115
ENGLISH
FLOW CHARTS
NO
YES
YES
YES
NO
Check the indoor main
board
Test the outdoor power
supply
If 230VAC is available but
310VDC is not, the power
module is damaged.
Replace it.
Measure the voltage between
Jumpers 3 and 4 of IC1 on the indoor
main board with a multimeter
Is the voltage a consistent
value of 0VDC to 5VDC?
The indoor mainboard is
damaged. Replace it.
Test the outdoor power
supply
The outdoor main board is damaged.
Replace it.
If the value varies between 0 and 80VAC, the outdoor
main board is damaged. Replace it.
Measure the AC voltage between pins 1
and 3 on the terminal of the outdoor unit
with a multimeter
If both 230VAC and 310VDC
are available, measure +12V
If the value is constant at about 30V, the main
board is damaged. Replace it.
NO
(A)
NO