Airwell VVFA Series Service Manual page 47

Digital tube Indication
indication on wired
on master controller
unit (hex)
Module over current
117 75
(software)
Compressor startup
118 76
failure
Detecting circuit of
119 77 transducer current is
abnormal
Power supply of
120 78 inverter controller
abnormal
Power supply of
121 79 inverter board is
abnormal
Radiator temp.sensor
122 7A
of module abnormal
Transient over
current of IPM
123 7B
module rectifier side
hardware
When there is no failure, if the starting condition can not be met, digital tube on master unit will display stand-by
code:
555.1 Outdoor ambient temperature too high (heating)
Outdoor ambient temperature too high or too low
555.3
(cooling)
555.4 Oil temp. preheat
Note:
1, The data in [ ] stores in EE
2, The PCB display failure method:
A. Digital display board: if the fault is 26-0, then display [26] first, and then display [-0]. If is 555.0, the first display [555],
and then display [. 0]. Failure code display is 1 second, failure display interval is 2 seconds.
B. LED light: the red light LED1 on behalf of ten digits, green light LED3 on behalf of the unit digit.
If it is 26-0, first LED1 flashes 2 times , then LED3 flashes 6 times. So circularly display.
If is 111-1, first LED1 flashes 11times, then LED3 flashes 1 time, and then LED1 normally on the LED3 flashes 1
time at the same time. So circularly display.
If is 555.0, the LED1 and LED3 normally on.
If is 555.4, the LED1 and LED3 flash 4 times at the same time. So circularly display.
Flash frequency of LED lights is 2Hz, interval time is 2 seconds.
Failure code
Failure description
definition
Module over current (software)
Compressor continuously startup 5 times all failed.
Current detection sensor of inverter controller is abnormal or
unconnected or connected wrongly.
Power supply of inverter controller is broken down instantly
Power supply of inverter controller is broken down instantly
Resistor of temp. sensor abnormal or temp. sensor
disconnected
Transient over current in IPM module rectifier side hardware
Ta>27°C, Standby
Ta>54°C or Ta<-15°C, Standby
The oil temperature does not meet the system start-
up conditions
45
Remarks
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
3 times in an
hour, confirm
failure; once
confirmation,
un-resumable
Resumable