Heat Recovery DC Inverter Multi VRF Unit
62
Content
symbol
Division
symbol
6
7
8
9
A
H
compressor
sensor of
compressor
compressor
compressor
compressor
drive DC bus bar
H
Drive IPM
module
protection of
fan
Malfunction of
drive
temperature
sensor of fan
Drive IPM high
temperature
protection of fan
Desynchronizing
protection of
inverter fan
Malfunction of
drive storage
chip of inverter
outdoor fan
High-voltage
protection of
fan’s drive DC
bus bar
Deb
u
g
g
in
g
U
Alarm
because valve
is abnormal
Malfunction of
pipeline for IDU
Malfunction of
pipeline for ODU
C
Alarm
because ODU
quantity is
inconsistent
Abnormal
communication
of converter
Emergency
status of
compressor
Emergency
status of fan
Emergency
status of module
Rated capacity is
too high
Sta
tu
s
A
Heat pump
function
setting
Quiet mode
setting
Vacuum pump
mode
Heating
n
Inquiry of
malfunction
Inquiry of
parameters
Inquiry of project
code of IDU
Check quantity of
IDU on line
Heat pump unit Heating only unit
Content
symbol
Division
symbol
C
L
E
F
J
P
Indoor
L
IDU is not
matching with
outdoor unit
Malfunction of
water flow
switch
Rotation speed
of EC DC water
pump is
abnormal
Malfunction
of shunt
valve setting
Setting of
functional DIP
switch code is
wrong
Zero-crossing
malfunction of PG
motor
d
Setting
capacity of
DIP switch
code is
abnormal
Malfunction of
air outlet
temperature
sensor
Malfunction of
indoor CO2
sensor
Malfunction
of upper
water
temperature
sensor of
water tank
Malfunction of
backwater
temperature
sensor
Malfunction of
inlet tube
temperature
sensor of
generator
Outdoor
E
F
Current
sensor of
compressor 2
is abnormal
Current
sensor of
compressor 3
is abnormal
Current sensor
of compressor
4 is abnormal
Current
sensor of
compressor
5 is
abnormal
Current
sensor of
compressor 6
is abnormal
Malfunction of DC
motor
J
Water flow
switch
protection
Protection
because high
pressure is
too low
Oil-return pipe
is blocked
Oil-return
pipe is
leaking
b
Protection
because the
temperature
sensor at the
top of
compressor 1
is loose
Protection
because the
temperature
sensor at the
top of
compressor 2
is loose
Malfunction of
inlet tube
temperature
sensor of
condenser
Malfunction
of outlet
tube
temperature
sensor of
condenser
High-pressure
sensor and
low-pressure
sensor are
connected
reversely
Malfunction of
temperature
sensor of
oil-return 2
P
Malfunction
of current
detection
circuit drive of
compressor
Low voltage
protection for
DC bus bar of
drive of
compressor
Phase-lacking
of inverter
compressor
Malfunction
of charging
loop of
driven of
compressor
Failure
startup of
inverter
compressor
AC current
protection of
inverter
compressor
H
Malfunction
of current
detection
circuit of fan
Low voltage
protection of
bus bar of fan
drive
Phase-lacking
of inverter fan
Malfunction
of charging
loop of fan
drive
Failure
startup of
inverter fan
AC current
protection of
inverter fan