ENGLISH
Code
number
Category
Abnormality
Cause
53
Inverter
Protection activation of inverter module Inverter module abnormality.
Failure of compressor, clogging of heat exchanger.
54
Inverter fin temperature increase
Abnormal inverter fin thermistor, clogging of heat exchanger, abnormal
outdoor fan.
55
Inverter module abnormality
Failure of inverter module.
56
Outdoor fan
Abnormal detection of fan motor
position
Abnormal of fan motor position detection circuit, disconnected wiring
57
Fan motor abnormality
Disconnected wire of incorrect wiring between control PCB, and inverter
PCB.
Incorrect wiring or fan motor abnormality.
Fan controller protection activation
Controller IC error signal detection (overcurrent, low-voltage and short-circuit
protection), instant overcurrent).
58
Fan controller
Abnormal fan controller
Abnormal operation speed
5A
Abnormal fan controller fin temperature
Fin thermistor fault, heat exchanger clogging, fan motor fault
5b
Overcurrent protection activation
Fan motor fault
5C
Abnormal fan controller sensor
Current sensor fault (instant overcurrent, increased fin temperature, low
voltage, earthing 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 the unit and the
refrigerant cycle number.
Over 64 indoor units setting by number or indoor unit address.
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
C1
CH box
Incorrect change-over box connection
2 or more change-over boxes 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 Change-Over Box
C3
Incorrect indoor unit refrigerant number
setting
Indoor units from different refrigerant cycles have been connected to
Change-Over 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
OTHER INDICATIONS
PMML0496 rev.1 - 12/2020
75