8 Troubleshooting
Alarm codes displayed in the remote control switch
SMGB0137 rev.0 - 05/2021
285
8
Code
Category
Content of Abnormality
Leading Cause
57
Fan Controller
Activation of fan controller protection
Driver IC error signal detection (protection for overcurrent,
voltage decrease, short circuit), instantaneous overcurrent,
disconnected wire or incorrect wiring between control PCB
and inverter PCB, incorrect wiring or fan motor abnormality.
58
Abnormal fan controller
Abnormal operation speed
88
Alarm for abnormality of fan or
compressor driver
The fan or the compressor driver do not transfer an
identification code
5A
Abnormal fan controller fin temperature
Fin thermistor fault, heat exchanger clogging, fan motor fault
5b
Activation of overcurrent protection
Fan motor failure
5C
Abnormality of fan controller sensor
Failure of current sensor (instantaneous overcurrent,
increase of fin temperature, low voltage, grand fault, step-
out)
A1
External input
Detection of external abnormality
Input signal by external abnormality detection setting
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
C1
CH-Box
Incorrect CH-Box connection
2 Or more CH-Box are connected between outdoor unit and
indoor unit
C2
Connection number of the indoor unit
incorrectly set
There are 9 or more indoor units connected to CH-Box
C3
Incorrect Indoor Unit Refrigerant Number
Setting
Indoor units from different refrigerant cycles have been
connected to CH-Box
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
?
N O T E
(*) In 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.
