Hitachi Utopia RPI-2.5HRG Service Manual page 54

Alarm
Code
# This alarm code is indicated only when remote control switch PC-2H2 is used being connected to
indoor unit.
# This alarm occurs in the case of incorrect connection like that TL terminal is connected to Vc terminal
as below when indoor units are wired.
I.U.1
CN13 (Blue)
Vc T
Vc T
Remote Control
Switch (Yellow)
The unit No. and unit code are as below regardless of the indoor unit.
00
Unit No.
00
Cycle System
E.00
Unit Code
Is wiring among indoor
units right?
Yes
Turn off the main power
switch and cut the wire JP4
at remote control switch,
then turn on the main power
switch again.
Phenomenon
Wiring Trouble
Incorrect Wiring Among Indoor Units
CN12 (Yellow)
T Vc T T
G L G L
T
Remote
G L
Control
Switch
No
Cause
Incorrect Wiring
CN13 (Blue) CN12 (Yellow)
Vc T T Vc T
G L G
Incorrect Wiring
Check Item
Check the wiring No.
TROUBLESHOOTING
T
L
Repair the wiring among
indoor units.
JP4
Action
(Turn OFF Main Switch)
Repair the wiring
correctly.
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