8 Troubleshooting
213
SMGB0064 rev.0 - 08/2011
8
*1)
Is DSW5-1P (terminal
resistance on PCB1) ON?
Set it correctly
No
Yes
Is the voltage
between the terminal
"1" and "3" of PCB1
220V or 240V? *2)
No
No
Yes
No
Replace the fuse
Yes
Yes
Connect CN8 of
PCB1
Yes
Faulty PCB1
Yes
No
Yes
Is LED1 (red) on
PCB1 ON?
Yes
No
Check the fuses of the
outdoor unit power supply
Yes
Remove CN8 of
PCB1
Is LED2 (green)
on PCB1 ON?
Is PCB1’
setting non-pole
operating?
Is connector
(PCN2, CN1) for the
transformer loosened?
Plug PNC2 and CN11
correctly
Is the fuse for
PCB1 blown out?
No
Set correctly
Is LED3 on PCB1’
ON?
Is LED 3 (yellow) on PCB1’
flickering more than once in 10
seconds?
Does the alarm occur with all
the indoor units?
Faulty PCB1
Yes
Is LED3 (yellow) ON, even
if CN2 of PCB1’ is removed?
Yes
Faulty PCB1
Check other indoor units
No
Check the wiring between the
outdoor unit and the indoor
units or the fuse (EF1) for
PCB1
Set correctly
Faulty PCB1’
*1) In case that terminal resistance
(DSW5-1P) is OFF when H-Link II
connection is performed.
– Set the terminal resistance to
ON when CN8 is removed.
– Set the terminal resistance
to OFF when CN8 is
reconnected.
*2) Check item
Power supply Faston terminal
380-415V/50Hz between 1 and 3 of
PCN1 on PCB
Outdoor unit
Indoor unit
Does the refrigeration
system setting between
DSW4+RSW1 on PCB1
and DSW5+RSW2 on
PCB1’ match?
Is LED3 (yellow) on
PCB1 flickering
more than once in
10 seconds?
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