Hitachi UTOPIA R32 Series Technical Catalogue page 130

11 Troubleshooting
Alarm codes
Code Category
b0 Incorrect setting of unit model code
Incorrect setting of unit and refrigerant
b1
cycle number
Wrong combination of indoor unit and
b3
remote control switches
b2 Abnormality of EEPROM
Incorrect indoor unit connection number
Indoor Unit
b5
setting
Abnormal communication between indoor
b6
PCB and indoor fan controller (**)
Transmission abnormality between the
b7
indoor and the PCB for 2 fans
Abnormality in the number of connected
bF
sub-PCB
Compressor protection alarm
EE Compressor
(it can not be reset from wired controller)
?
N O T E
• (*) n the case of RPI-16/20, the fan motor of both units is stopped immediately upon occurrence of an alarm at either of the units (upper
or lower side). The remote control switch indicates the cause of alarm (codes 1, 11, 12, 13, 14, 19) for the unit where the alarm has
occurred, while alarm code 19 (Fan motor stoppage) is indicated for the other unit. Therefore it is necessary to check both units only
in case of occurrence of alarm 19.
• (**)When the RUN indicator flashes every 4 seconds, there is a transmission failure between the indoor unit and the remote control
switch (Loose connector, Incorrect Wiring, Disconnected Wire, Broken Wire).
122 TCGB0136 rev.1 - 05/2021
Content of Abnormality Leading Cause
Incorrect setting of indoor unit model
The setting number of the indoor units is over 64 or the
indoor unit address not correct
Wrong combination of indoor unit and remote control
switches
EEPROM failure, incorrect data of EEPROM
There are more than 17 units not corresponding to H-LINK II
connected to one system
Communication failure, disconnected communication cable,
abnormal connection
Transmission abnormality between the indoor unit and the
PCB for 2 fans
Abnormality in the number of connected sub-PCB
This alarm code appears when the following alarms* occurs
three times within 6 hours
*02, 07, 08, 39, 43 To 45, 47