Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 108 / 240

Ultra Heat GMV VRF Technical Service Manual MAINTENANCE
103
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
O
u
td
o
o
r
E
F
Limited
frequency
reduction for
power
protection
Limited
frequency
reduction for
IPM
temperature
protection
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
drive
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
Deb
u
g
g
in
g
U
Setting of
main IDU is
succeeded
Emergency
operation DIP
switch code of
compressor is
wrong
Charging of
refrigerant is
invalid
Identification
malfunction of
IDU of mode
exchanger
C No main unit
The matching
ratio of rated
capacity for
IDU and ODU
is too low
Communication
malfunction
between mode
exchanger and
IDU
Malfunction of
multiple main
control units
Address DIP
switch code of
system is
shocking
Malfunction of
multiple wired
controller
Sta
tu
s
A Cooling
Charge
refrigerant
automatically
Charge
refrigerant
manually
Fan
Cleaning
reminding of
filter
Debugging
confirmation
when starting
up the unit
n
Cooling only
unit
Negsative code Fan model
High
temperature
prevention
when heating
Content
symbol
Division
symbol
U b d n y
In
d
o
o
r
L
Indoor unit’s branch
is not inconsistent
for one-to-more unit
of heat recovery
system
d
Malfunction of
drainage pipe
temperature sensor
of generator
Debugging status
Malfunction of
solar power
temperature
sensor
Malfunction of
swing parts