Hitachi RAS-(3-6)HVNC1(E) - Page 239

8 Troubleshooting
225
SMGB0087 rev.0 - 12/2013
8
Set it correctly
No
No
No
Yes
No
Yes
Yes
No
Yes
Yes
No
Check power source
for outdoor unit
Yes
No
Yes
Yes
No
Outdoor unit
Indoor unit
Remove connector “CN8” of PCB1.
*1)
Reconnect connector “CN8” of OU
PCB1
Failure of IU PCB
Set correctly
Check wiring between
OU and IU or fuse for
IU PCB and PCB1.
Replace fuse is failed.
Check other indoor
units
Failure of IU PCB
Set it correctly
Failure of PCB1
Replace fuse
Yes
Is DSW5-1P
(terminating
resistance) OU on PCB1
ON?
Is LED1 (red) on
OU PCB1 ON?
Is LED3 (yellow)
on OU PCB1 ON?
Is LED3 (yellow)
on PCB1 ashing
more than once in 10
seconds?
Is IU PCB setting
Non-pole operating. *2)
Is LED3 (yellor)
on IU PCB1 ON?
Is LED 3
on PCB1’ ickering
more than once in 10 sec-
onds?
Does the refriger-
ant system number
setting between OU and
IU correspond?
(OU: DSW4 and RSW1. IU:
DSW5 and RSW2) *4)
Is LED3 (yellow)
ON even if connector
“CN2” of IU PCB
is removed?
Is 230 V
between L1, N on
TB1?
Does the fuse on
OU PCB1 blow out?
No
No
Does alarm occur
with all indoor units?
No
Yes
Yes
Yes
Failure of IU PCB
No
RPK-FSN(H)3M, RPC-FSN3, RCIM-FSN3, RCI-FSN3 only