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LED
Indication
indication
on wired
Failure code
on master
controller
unit
(hex)
76-0
Incorrect
outdoor unit
4C
quantity,
76-1
address or
capacity setting
76-2
Oil equalization
protection
77
4D
among outdoor
units
Lack of
78-0
4E
refrigerant
alarm in cooling
Lack of
78-1
4E
refrigerant
alarm in heating
Capacity not
80
50
match to the
outdoor units
Dip switch for
outdoor unit
83
53
model selection
setting wrong
The program
99-x
63
self-checking
fault
DC fan driving
100
64
board IPM
alarm
DC fan driving
101
65
board detecting
out of control
DC fan driving
102
66
board EEPROM
faulty
DC fan driving
board over
103
67
current or
current detector
damaged
definition
Submachine quantity setting are not in conformance with
data in EEPROM of the host.
Submachine address setting are not in conformance with
data in EEPROM of the host.
Submachine capacity setting are not in conformance with
data in EEPROM of the host.
If ToilpB-ToilpA≤10°C, alarm and stop. Not detecting in
the course of startup, defrosting and oil return and in 10
minutes after oil return finishes.170 seconds later, resume
automatically. If it occurs 2 times in an hour, lock the
failure.
When cooling compressor runs, Ps<0.1MPa for 30
minutes.
When heating compressor runs, Ts1-ET>20 & Ts1-ET>20
& LEV open fully for 60 minutes, output the lack of gas
alarm signal and not stop.
In VRF system, the difference of capacity between slave
unit and master unit is more than 6HP, confirm the failure.
According to the PCB code, detect the dip switch for
outdoor unit model selection setting wrong.
x=0~5
DC fan driving board IPM alarm because of over current
or too high temp. of modular.170 seconds later, resume
automatically. If it occurs 4 times in an hour, confirm the
failure.
DC fan driving board detecting is out of control. 170
seconds later, resume automatically. If it occurs 4 times in
an hour, confirm the failure.
DC fan driving board Eeprom data is wrong. 170 seconds
later, resume automatically. If it occurs 4 times in an hour,
confirm the failure.
DC fan driving board over current is over 5A, then
alarm.170 seconds later, resume automatically. If it occurs
4 times in an hour, confirm the failure.
Failure description
144
Remarks
Reset
Once
confirmed,
unresumable
Resumable
Unresumable
Unresumable
Resumable
Once
confirmed,
unresumable
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