63
31
Circulatory
System
Indoor and outdoor unit capacity set,
capacity combination error
The outdoor unit capacity is set incorrectly, or the
total capacity of the indoor unit is too large.
35
The indoor unit address is incorrect
The same indoor unit number setting appears in
the same system.
36
Incorrect indoor unit / misconfigured brand
The indoor unit is J-type (R22) or the brand is
misconfigured.
38
Outdoor protection detection circuit
abnormalities
Outdoor unit protection circuit is abnormal (outdoor
unit board wiring error).
3A
The Outdoor Unit
Abnormal capacity of outdoor unit
The total capacity of outdoor unit is greater than
96 HP.
3b
The outdoor unit is set incorrectly
Outdoor units (Master/slave), combination type,
voltage setting error.
3d
Abnormality between outdoor units
Wrong wiring, no wiring, broken wire or PCB board
failure.
43
Protective Device
Compression ratio too low protection acts
Poor compressor (compressor frequency converter,
power failure).
44
Low pressure is too high protection action
Refrigeration indoor overload, outdoor temperature
is too high when heating, expansion valve lock
(loose wiring).
45
High pressure is too high to protect the
action
Overload operation (heat exchanger blockage,
return air short circuit), pipeline blockage,
excessive refrigerant, mixed with non-condensable
gas.
46
High pressure is too low to protect the
action
Lack of refrigerant, four-way valve gas blow-by
47
Low pressure too low protection action
(vacuum operation protection)
Insufficient refrigerant, pipe clogged, expansion
valve locked in the open position (loose wiring).
48
Overload operation protection action
Overload operation, compressor abnormalities.
51
Sensor
Inverter current sensor is abnormal
Current sensor failure.
53
Frequency
Converter
The inverter signal detection is incorrect
IC driver program detects errors (over-current, low
voltage, short circuit protection).
54
Inverter radiator temperature anomalies,
protection device action
Variable frequency radiator thermistor failure, heat
exchanger dirty block, fan motor failure.
55
Inverter fault
Frequency conversion board failure.
57
Fan Control
Substrate
Fan control board protection action
IC driver program detects errors (over-current, low
voltage, short circuit protection), instantaneous
over-current.
5A
Fan control board radiator temperature
anomalies
Base board radiator thermistor failure, heat
exchanger dirty block, fan motor failure.
5b
Over-current protection action
Fan motor failure.
5c
Fan control board current sensor is
abnormal
Current sensor failure (over current, radiator
temperature is too low, low voltage, so on.)
EE
Compressor
Compressor alarm
Compressor damage alarm occurred three times
within 6 hours
b1
Outdoor Unit
Address Setting
Address code. Cooling system setting
error (outdoor unit)
Address, the number of refrigeration cycle set more
than 64.
b5
Indoor Unit
Address Setting
Setting error on number of connected
indoor units
In a system connected to 17 or more non-H-LINK II
indoor unit.
3E
Protective Device
Frequency control board combination
exception
In a system connected to 17 or more non-H-LINK II
indoor unit.
A1
Active filter abnormal
When the active filter detects an abnormal signal.