Airwell YEVFD Series, Service Manual

Page: 61 / 92

Digital
tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description Remarks
116 74
Abnormal
communication
between the
inverter module
and the control
PCB
If no communication signal is detected for 30
seconds, , failure alarm.After detection, inverter
module will recover immediately.
Resumable
117
75
The inverter
module over
current (software)
Module rectifier side software instantaneous
overcurrent
Resumable
Inverter Module overload Resumable
Module software over current Resumable
118 76
Compressor
startup failed
The compressor failed to start continuously for 5
times.
Resumable
119 77
Current detection
circuit failure
The module rectifier side current detection circuit is
abnormal.
Resumable
The sensor used for current detection of inverter
controller is abnormal, disconnected or connected
incorrectly.
Resumable
121 79
Power supply of
inverter module
board is abnormal
Power supply of inverter board is broken down
instantly.
Resumable
122 7A
The temp. sensor
of inverter module
is abnormal.
The resistance of inverter temperature sensor is
abnormal or not connected.
Resumable
124 7C
Inverter module
power supply
failure
inverter power supply failure Resumable
In case of no failure, if the starting conditions of the system are not met, the digital tube of the outdoor unit will
display the standby code of the air conditioner:
555.0
Standby state of capacity over-
matched
The ratio of indoor capacity to out-
door capacity is over 130%.
Resumable
555.1 Heating at high ambient temp.
Ta>27°C, the indoor units standby
when they are running in heatling
mode.
555.3
Cooling at ambient temp. too high
or too low
Ta>54°C or Ta<-10°C, the indoor
units standby when they are running
in cooling mode.
555.b
The running mode of outdoor unit
does not match with the indoor
units.
The outdoor unit maybe setted to
cooling only or heating only.
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