Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 106 / 240

Ultra Heat GMV VRF Technical Service Manual MAINTENANCE
101
CHAPTER 4 MAINTENANCE
PART 1 FAILURE CODE TABLE
1 SYSTEM FAILURE CODE TABLE
Content
symbol
Division
symbol
0 1 2 3 4 5
In
d
o
o
r
L
Malfunction of
IDU
Protection of
indoor fan
Auxiliary
heating
protection
Water-full
protection
Abnormal
power supply
for wired
controller
Freeze
prevention
protection
d
Indoor PCB is
poor
Malfunction of
lower water
temperature
sensor of
water tank
Malfunction of
ambient
temperature
sensor
Malfunction of
entry-tube
temperature
sensor
O
u
td
o
o
r
E
Malfunction of
ODU
High-pressure
protection
Discharge
low-temperatur
e protection
Low-pressure
protection
High discharge
temperature
protection of
compressor
F
Main board of
ODU is poor
Malfunction of
high-pressure
sensor
Malfunction of
low-pressure
sensor
Malfunction of
discharge
temperature
sensor of
compressor 1
J
Protection for
other modules
Over-current
protection of
compressor 1
Over-current
protection of
compressor 2
Over-current
protection of
compressor 3
Over-current
protection of
compressor 4
Over-current
protection of
compressor 5
b
Malfunction of
outdoor
ambient
temperature
sensor
Malfunction of
defrosting
temperature
sensor 1
Malfunction of
defrosting
temperature
sensor 2
Malfunction of
liquid
temperature
sensor of
sub-cooler
Malfunction of
gas
temperature
sensor of
sub-cooler
P
malfunction of
driving board
of compressor
Driving board
of compressor
operates
abnormally
Voltage
protection of
driving board
power of
compressor
Reset
protection of
driving module
of compressor
Drive PFC
protection of
compressor
Over-current
protection of
inverter
compressor
H
Malfunction of
driving board
of fan
Driving board
of fan operates
abnormally
Voltage
protection of
driving board
power of fan
Reset
protection of
driving module
of fan
Drive PFC
protection of
fan
Over-current
protection of
inverter fan
Deb
u
g
g
in
g
U
Preheat time
of compressor
is insufficient
Wrong setting
of OD
U’s
capacity
code/jumper
cap
Power supply
phase
sequence
protection
Refrigerant-lac
king protection
Wrong
address for
driving board
of compressor
C
Communicatio
n malfunction
between IDU,
ODU and
IDU’s wired
controller
Communicatio
n malfunction
between main
control and
inverter
compressor
driver
Communicatio
n malfunction
between main
control and
inverter fan
driver
Malfunction of
lack of IDU
Alarm
because
project code
of IDU is
inconsistent
Sta
tu
s
A
Unit waiting for
debugging
Refrigerant
recovery
operation of
after-sales
Defrosting Oil-return
n
SE operation
setting of
system
Compulsory
defrosting
Limit setting
for max.
capacity/outpu
t capacity
Compulsory
excursion of
engineering
code of IDU