4
1
38
Abnormality of Picking up Circuit for
Protection in Outdoor Unit
Failure of Protection Detecting Device
(Incorrect Wiring of Outdoor PCB)
3E
Combination Problem between Inverter
PCB and Outdoor PCB
Incorrect Combination between Inverter PCB and Outdoor
PCB
43
Activation of Pressure Ratio Decrease
Protection Device
Defective Compression (Failure of Compressor of Inverter,
Loose Power Supply Connection)
44
Activation of Low Pressure Increase
Protection Device
Overload at Cooling, High Temperature at Heating,
Expansion Valve Locking (Loose Connector)
45
Activation of High Pressure Increase
Protection Device
Overload Operation (Clogging, Short-Pass), Pipe Clogging,
Excessive Refrigerant, Inert Gas Mixing
47
Activation of Low Pressure Decrease
Protection Device (Vacuum Operation
Protection)
Insuff cient Refrigerant, Refrigerant Piping, Clogging,
Expansion Valve Locking at Open Position (Loose
Connector)
48
Activation of Inverter Overcurrent
Protection Device
Overload Operation, Compressor Failure
51
Problem with Inverter Current Sensor
Current Sensor Failure
53
Inverter Error Signal Detection
Driver IC Error Signal Detection (Protection for Overcurrent,
Low Voltage, Short Circuit)
54
Abnormality of Inverter Fin Temperature
Abnormal Inverter Fin Thermistor,
Heat Exchanger Clogging, Fan Motor Failure
55
Inverter Failure
Inverter PCB Failure
57
Activation of Fan Controller Protection
Driver IC Error Signal Detection (Protection for Overcurrent,
Low Voltage, Short Circuit), Instantaneous Overcurrent
5A
Abnormality of Fan Controller Fin
Temperature
Fin Thermistor Failure, Heat Exchanger Clogging, Fan Motor
Failure
5b
Activation of Fan Controller Overcurrent
Protection
Fan Motor Failure
5C
Problem with Fan Controller Sensor
Failure of Current Sensor (Instantaneous Overcurrent,
Increase of Fin Temperature, Low Voltage, Ground Fault,
Step-Out)
（
b0
）
Indoor models and capacity is set
incorrectly
（
b1
）
Incorrect Outdoor Unit Address No. or Unit
Number Setting
Over 64 Number is Set for Address or Refrigerant Cycle.
（
b2
）
Abnormality of EEPROM
(b3)
Incorrect of Outdoor Unit Combination
Outdoor unit, indoor machine different Tier, brand exception
combination
b5
Incorrect Indoor Unit Connection No.
Setting
More than 18, Non-Corresponding to H-LINK II Units are
Connected to One System.
（
b6
）
Indoor fan controller communication error
（
b7
）
Indoor -2 fan with controller communication
error
（
bF
）
The number of software control board
connections is abnormal
EE
Compressor Protection Alarm (It is cannot
be reset from remote Controller)
If the alarms (02; 07; 08; 43; 44; 45; 47) occur three times
within 6 hours, the alarm code appears.
A1
Noise Filter Board is abnormal
Noise Filter Board is abnormal
When the alarm codes in the brackets have been appeared, they are presented that the
malfunctions
are from the indoor unit.