Hitachi RAS-(3-6)HVNC1(E) - Page 242

8 Troubleshooting
228
SMGB0087 rev.0 - 12/2013
Is DSW5-1P (Terminating
Resistance) on O.U PCB1
ON?
Set it correctly
O.U.: Outdoor unit
I.U.:Indoor unit
Check power source
for outdoor unit
Is LED4 (red) on O.U.
PCB1 ON?
Is LED1 (red) on O.U.
PCB1 ON?
Is LED3 (yellow) on
O.U. PCB1 ON?
Is LED3 (yellow) on I.U.
PCB1 ON?
Is LED3 (yellow) ON even
if connector “CN2” of I.U.
PCB is removed?
Does alarm occur with
all indoor units?
Failure of O.U. PCB
Failure of I.U. PCB
Check other indoor
units
Check wiring between
O.U. and I.U. or fuse
for I.U PCB and PCB1.
Replace fuse if failed
Is LED3 (yellow) on I.U.
PCB ashing more than
once in 10 seconds
Does refrigerant system
No. setting between O.U.
and I.U. correspond?
(O.U.:DSW4 and RSW1)
(I.U.: DSW5 and RSW2) *4)
Is LED3 (yellow) on
O.U. PCB1 ashing
more than once in 10
seconds?
Reconnect connector
“CN8” (red) of O.U. PCB1
Is I.U. PCB setting Non-
pole operating *2)
Set it correctly
Set it correctly
Failure of I.U. PCB
RPK-FSN(H)3M, RPC-FSN3, RCIM-FSN3, RCI-FSN3 only
Remove connector
“CN8” (red) of PCB1*1)
Is there 230V between L1/
L2(N) (For 1~ models) or
between L1/L2/L3/N (For
3N~ models)?
Does the fuse EF1 on
O.U. PCB1 blow out?
Does the fuse EF1 (and
EF2 for 3~ models) blown
out?
Do the fuses for prevention of
rush current (RS1/RS2) blown
out?
Failure of DC Fan Motor *5)
Failure of PCB1 *6)
Is DC fan motor
faulty?
Does the fuse EF1 (for 1~
models) or EF331 (for 3~
models) of the inverter PCB
blown out?
Do the fuses EF2/EF3
(for fan motor protec-
tion blown out?
Is LED201 (red) on
inverter PCB ON?
Failure of Inverter PCB
Outdoor
unit
Indoor
unit
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
NoNo
No
No
No
No