Troubleshooting by Remote Controller
Si20-701_B
413
Troubleshooting
Cool / heat
selection is unified.
Is
there
any broken
wire or erroneous
wire connection in the
communication wiring
of multi outdoor
unit system?
NO
YES
YES
NO
Check
and see if the
following items are
normal.
Fix the problem.
NO
C/H
SELECT is set to
"MASTER."
NO
NO
YES
Replace the
outdoor unit PCB
(A1P).
NO
Set C/H SELECT
to "IND."
YES
The cool / heat
unified address
for outdoor units
in outdoor -
outdoor unit
transmission is
duplicated. Set
the address
correctly.
YES
Fix the outdoor
units multi
connection
transmission
wiring and reset
power.
C/H
SELECT is set to
"IND".
C/H
SELECT is set to
"SLAVE."
A
B
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.