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Failure code
Digital tube
Indication
indication
on wired
on master
controller
unit
(hex)
110
110
111
111
112
112
114
114
116
116
117
117
118
118
119
119
121
121
122
122
When there is no failure, if the starting condition can not be met, digital tube on master unit will display stand-by code:
Standby state of capacity
555.0
overmatch
Outdoor ambient temperature
555.1
too high (heating)
Outdoor ambient temperature
555.3
too high or too low (cooling)
The running mode of outdoor
555.b
unit does not match with the
indoor units.
Failure code
Failure description
definition
IPM modular
IPM modular over current, in short circuit, over heat, voltage
protection (F0)
too low of control circuit.
Compressor out of
In the course of compressor startup or running, the unit can
control
not detect the rotor position, or not connecting compressor.
Radiator of
transducer temp.
Radiator temp. too high
too high
Voltage too low
of DC bus line of
Voltage of power source is too low
transducer
Communication
abnormal between
Communication is disconnected
transducer and
control PCB
Compressor startup fails for 5 times continuously, or
Transducer over
compressor is running down till stops caused by over
current (software)
current or over heat
Compressor
The sensor used for current detecting of transducer is
startup failure
abnormal, disconnected or incorrectly connection
Detecting circuit of
Current detection sensor of frequency controller is abnormal
transducer current
or unconnected or connected wrongly.
is abnormal
Power supply of
inverter board is
Power supply of inverter board is broken down instantly
abnormal
Radiator temp.
sensor of
Resistor of temp.sensor abnormal or temp.sensor
transducer
disconnected
abnormal
When the ratio of indoor horse power and outdoor horse power is
less than 50% or more than 130%, the system is in standby mode.
Ta>27°C, Standby
Ta>54°C or Ta<-20°C, Standby
The outdoor unit maybe setted to cooling only or heating only.
21
Remarks
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
Resumable
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
Resumable
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