Gree GMV-120WM/B-F Service Manual

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
175
Fa
ult
co
de
Fault
Possible reasons
Solution
Primary reason
Secondary reason
Tertiary reason
Descr
iption
Confir
mation
metho
d
Descrip
tion
Confirmation method
Description
Confi
rmati
on
meth
od
E3
Low-p
ressu
re
Prote
ction
4.
The
press
ure
senso
r is
faulty.
——
4.2 The
high
pressur
e and
low
pressur
e
sensors
are
connect
ed
reverse
ly.
Connect the stop valves of
the module high- and
low-pressure gas pipes to
the high and low pressure
gauges and transform the
readings into
corresponding
temperatures. Compare
them to the high- and
low-temperatures tested
by the system. If the
difference is larger than
5°C （9℉）, it is
exceptional.
——
——
Reconnect
the high-
and
low-pressur
e sensors.
5.
The
fan is
not
worki
ng
prope
rly.
A. The
IDU's
fan
does
not
work
in the
coolin
g
mode.
B. The
ODU's
fan
does
not
work
in the
heatin
g
mode.
5.1 The
IDU's
fan is
faulty.
Manual check
6.1.1 The power cable
connecting the motor
and main board is
loose.
Manu
al
check
Reconnect
the motor
with the
power
cable.
6.1.2 The electric
capacity is not
connected or is
damaged.
Manu
al
check
Connect or
replace the
electric
capacity.
6.1.3 The motor is
damaged.
Other
reaso
ns
Replace the
motor.
5.2 The
ODU's
fan is
faulty.
Manual check
6.2.1 The fan motor is
not properly connected
with the control board
of the motor.
Manu
al
check
Reconnect it
properly.
6.2.2 The fan motor is
not properly connected
with the control board of
the motor with the
communication
feedback cable.
Manu
al
check
Reconnect it
properly.
6.2.3 The control board
of the fan's motor is
damaged.
Manu
al
check
Replace the
control
board of the
motor.
6.2.4 The main board
of the fan's motor is
damaged.
Other
reaso
ns
Replace the
motor.
6. Not
enou
gh
refrig
erant
Other
reason
s
Incorre
ct
quantity
of
refriger
ant is
injected
.
——
——
——
Check the
necessary
amount of
refrigerant
and inject
refrigerant
slowly via
the stop
valve of the
low-pressure
gas pipe.

Gree GMV-120WM/B-F Specifications

General

Brand	Gree
Model	GMV-120WM/B-F
Category	Inverter
Language	English