DC Inverter Multi VRF System
34
Content
symbol
Division
symbol
C
L
E
F
J
P
Indoor
L
Models for
IDU and
ODU are not
matched
d
Abnormal
setting for
capacity
button
Malfunction of
air-outlet
temperature
sensor(Fresh
air unit)
Malfunction of
indoor CO
2
sensor (fresh
air unit)
E
Drop
protection of
discharge
temperature
sensor of
compressor
1
F
Malfunction
of DC motor
J
High-pressure
protection
P
Drive current
detection
circuit
malfunction
of
compressor
Low-voltage
protection of
compressor’s
drive DC bus
bar
Phase-lacking
of inverter
compressor
Drive
charging
circuit
malfunction
of
compressor
Failure
startup of
inverter
compressor
AC current
protection of
inverter
compressor
H
Drive current
detection
circuit
malfunction
of fan
Low-voltage
protection of
fan’s drive DC
bus bar
Phase-lacking
of inverter fan
Drive
charging
circuit
malfunction
of fan
Failure
startup of
inverter fan
AC current
protection of
inverter fan
Debugging
U
Setting of
main IDU is
successful
Wrong
button-dial
Charging of
refrigerant is
invalid
C
Malfunction
of lack of
main control
unit
Rated capacity
is too low
Malfunction
of multiple
main control
units
Malfunction
of multiple
main wired
controllers
Malfunction
of multiple
main wired
controllers
Status
A Cooling
Charging
refrigerant
automatically
Charging
refrigerant
manually
Fan
Alarm for
cleaning
filter
Debugging
confirmation
for startup of
unit
n
Cooling only
unit
Negative sign
code
Fan model