Hitachi UTOPIA R32 Series Installation And Operation Manual page 72

Code Category
b0
b1
b2
Indoor Unit
b5
b6
C1
Incorrect indoor unit connection
C2
CH-Box
(Change-Over
C3 Box)
C4
C5 Incorrect connection port setting
EE Compressor
PMEN0654 rev.0 - 12/2023
Content of Abnormality
Incorrect setting of unit model
code
Incorrect setting of unit and
refrigerant cycle number
Abnormality of EEPROM
Incorrect indoor unit number
setting
Abnormal communication
between indoor PCB and indoor
fan controller
Incorrect CH-Box connection
number
Incorrect indoor unit refrigerant
number setting
Incompatible outdoor unit
connection (CH-Box)
Compressor protection alarm
(It can not be reset from wired
controller)
Leading Cause
Incorrect setting of indoor unit model
64 or more number is set for address or refrigerant cycle
EEPROM failure, incorrect data of EEPROM
There are 17 or more non-corresponding to H-LINK II
units are connected to one system.
Communication failure, disconnected communication
cable, abnormal connection
2 or more CH-Box are connected between outdoor unit
and indoor unit
9 or more indoor units connected to single branch type
CH-Box
7 or more indoor units connected per a branch of
multiple branch type CH-Box
Indoor units of different refrigerant cycle number are
connected to CH-Box
This outdoor unit is not compatible with this CH-Box.
Indoor unit is connected to a port that is set to not used
for multiple branch type CH-Box
This alarm code appears when the following alarms*
occurs three times within 6 hours
*02, 07, 08, 39, 43 to 45, 47
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