59
LD
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
77
4D
Oil equalization
protection
among
outdoors
ToilpB-ToilpA≤10°C, unit alarms and
stops. No detection in and 10 mins after
the startup, defrosting and oil return
control. Resume automatically after
170 secs. Two times an hour, failure
confirmed.
Once
confirmation,
un-
resumable
78-0
4E
Refrigerant
shortage alarm
in cooling
Compressor running in cooling mode,
Ps<0.1MPa continues for 30 mins
--
78-1
4F
Refrigerant
shortage alarm
in heating
Compressor running in heating mode,
Ts1-ET>20 & Ts1-ET>20 & LEV are
fully opened for 60 mins. Alarm signal is
output without stopping the unit.
80
50
Unmatch
combination of
outdoors
In VRF system, alarm if the capacity
difference between slave and master
units is larger than 6Hp.
83
53
Outdoor DIP
switch setting
failure
According to PCB special No., outdoor
model DIP switch errors are detected.
99-X
63
Program errors
self-check
X=0~5
Once
confirmation,
un-
resumable
110
6E
IPM module
protection (FO)
There are over current(hardware type),
short circuit, over heat and under voltage
of IPM module
Four times
an hour,
then failure
confirmed.
Once
confirmation,
un-
resumable
111
6F
Inverter
compressor out
of step
when for 6 times of failed detection
of rotor position in startup or running
process, INV control board will
automatically recover after 5 secs of stop
112
70
Module cooling
fin temp. too
high
Temp>94°C, alarm for error
Temp≤94°C, auto INV control board will
automatically resume
113
71
Inverter
controller:
overload
Inverter controller outputs too high
current
114
72
Module DC
under voltage
Power supply voltage < DC420V, error be
alarmed Voltage ≥ DC420V, INV control
board automatically resume
115
73
Module DC
over voltage
Power supply voltage > DC642V, error be
alarmed
Voltage ≤ DC642V, INV control board
automatically resume
Failure code
