60
Failure code
LD
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
116
74
Abnormal
communication
with module
If failed to detect the communication
signal for 30 secs, error alarms. INV
control board will promptly resume when
detecting that.
Four times
an hour,
then failure
confirmed.
Once
confirmation,
un-
resumable
117
75
Module
software: over
current
Module software over current
118
76
Module: start up
failed
Compressor startup failed for 5
consecutive times
119
77
Inverter
controller
current
detection: circuit
abnormal
Malfunction of INV controller current
detecting sensor
Non connection or wrong connection
120
78
Inverter
controller
power supply
abnormal
INV controller power supply suddenly cut
off when supplying power
121
79
Power supply
of inverter
board is
abnormal
Power supply of inverter board is broken
down instantly
3 times in an
hour, confirm
failure;
once
confirmation,
un-resumable
122
7A
Radiator temp.
Sensor of
transducer
abnormal
Resistor of temp. sensor abnormal or
temp. sensor disconnected
125
7D
Compressor
frequency
unmatch
(Current frequency≥INV; target
fr3Hz) or (target frequency>0 &
actual frequency=0) continues 2 mins
Resumable
127
7F
MCU reset
abnormal
If master unit inspects that MCU of
slave unit is reset, and the slave unit
is running, master unit will alarm MCU
reset failure, then the whole system will
stop; if in heating mode, when restart up,
4-way valve will not be electrified, the
whole system will execute 4-way valve
reversing operation again. if it occurs
three times in an hour, alarm and confirm
the failure.
Once
confirmation,
un-
Resumable
128
80
MCU requires
upgrade
VRF system program version is
incompatible. Prompt to upgrade the
program.
Once
confirmation,
un-
Resumable
