Is LED3 (yellow) on
PCB flashing more than
once in 10 seconds?
Is PCB setting
Non-pole operating.
No
Is LED3 (yellow)
on PCB ON?
Yes
Yes
Does Alarm occur with
all indoor units?
Yes
Yes
Faulty PCB(1)
Set it correctly.
Faulty PCB.
Check wiring between
CH unit and indoor units
or fuse (EF1) for PCB.
No
Does refrigeration system
setting between DSW1
on PCB1 and DSW5
on PCB correspond?
No
Indoor
Unit
No
Check other indoor units.
Set correctly.
No
Faulty PCB.
Is LED3 (yellow)
ON even if #1 and #2
on TB2 is removed?
Y
esYes
No
*1) In the case that terminating resistance (DSW10, contact 1) is in the OFF when the H-LINK connection is performed.
Set terminating resistance to ON when #1 and #2 on TB2 is removed.
Set terminating resistance to
OFF when #1 and #2 on TB2 is reconnected.
* Check item
Power supply Faston terminal
400V 50Hz N1
8 Troubleshooting
178
SMGB0065 rev. 1 - 12/2010
To Next Page
Loading...
