DC Inverter Multi VRF System
33
Content
symbol
Division
symbol
6
7
8
9
A
H
Indoor
L Mode shock
No main IDU
Power supply
is insufficient
1-to-more:
number of IDU
is inconsistent
1-to-more:
IDU series
is
inconsisten
t
Alarm due to
bad air
quality
(Fresh air
unit)
d
Malfunction
of exit-tube
temperature
sensor
Malfunction
of humidity
sensor
Malfunction of
jumper cap
Web
address of
IDU is
abnormal
PCB of wired
controller is
abnormal
J
Gas-mixing
protection of
4-way valve
High pressure
ratio
protection of
system
Protection
due to
abnormal
pressure
b
Malfunction
of inlet temp
sensor of
gas-liquid
separator
Malfunction
of outlet
temp sensor
of gas-liquid
separator
Malfunction of
heat exchanger
temperature
sensor
Clock of
system is
abnormal
P
Drive IPM
module
protection of
compressor
Malfunction
of drive
temperature
sensor of
compressor
Drive IPM
high
temperature
protection of
compressor
Desynchronizin
g protection of
inverter
compressor
High-voltage
protection of
compressor’
s drive DC
bus bar
Debuggin
g
U
Alarm
because
valve is
abnormal
Short-circuit
malfunction of
IDU
Malfunction of
pipe-line for
ODU
C
Rated
capacity is
too high
Status
A
Heat pump
function
setting
Quiet mode
setting
Vacuum pump
mode
IPLV test
EU AA
level EER
test mode
Heating
n
Malfunctio
n inquiry of
unit
Paramete
r inquiry
of unit
Engineerin
g No.
inquiry of
indoor unit
Heat pump
unit
Heating only
unit
