11 Troubleshooting
Alarm codes
TCGB0136 rev.1 - 05/2021
122
Code Category Content of Abnormality Leading Cause
b0
Indoor Unit
Incorrect setting of unit model code Incorrect setting of indoor unit model
b1
Incorrect setting of unit and refrigerant
cycle number
The setting number of the indoor units is over 64 or the
indoor unit address not correct
b3
Wrong combination of indoor unit and
remote control switches
Wrong combination of indoor unit and remote control
switches
b2 Abnormality of EEPROM EEPROM failure, incorrect data of EEPROM
b5
Incorrect indoor unit connection number
setting
There are more than 17 units not corresponding to H-LINK II
connected to one system
b6
Abnormal communication between indoor
PCB and indoor fan controller (**)
Communication failure, disconnected communication cable,
abnormal connection
b7
Transmission abnormality between the
indoor and the PCB for 2 fans
Transmission abnormality between the indoor unit and the
PCB for 2 fans
bF
Abnormality in the number of connected
sub-PCB
Abnormality in the number of connected sub-PCB
EE Compressor
Compressor protection alarm
(it can not be reset from wired controller)
This alarm code appears when the following alarms* occurs
three times within 6 hours
*02, 07, 08, 39, 43 To 45, 47
? NOTE
• (*) 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.
• (**)WhentheRUNindicatorashesevery4seconds,thereisatransmissionfailurebetweentheindoorunitandtheremotecontrol
switch (Loose connector, Incorrect Wiring, Disconnected Wire, Broken Wire).
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