Gree GMV5E Series Service Manual page 143

GREE
Fault
Primary reason
Fault
code
Description
5. The high
pressure
switch is
faulty.
6. The fan is
not working
properly.
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Possible reasons
Secondary reason
Confirmation
Description
method
sensors are
connected
reversely.
5.1 The high
pressure
switch is not
E1 protection
connected to
is displayed
the main
on the unit
board.
when it is
powered on.
5.2 The high
pressure
switch is
damaged.
A. The
6.1 The
ODU's fan
does not IDU's fan is
work in the faulty.
cooling
mode. B. The
IDU's motor
does not
work in the
heating
mode.
6.2 The
ODU's fan is
faulty.
Tertiary reason
Confirmation
Description
method
and air pipe 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, it
is exceptional.
5.1.1 The
pressure
switch is not
——
connected
to the main
board.
5.1.2 The
connect
wire
between the
——
pressure
switch and
main board
is faulty.
—— ——
6.1.1 The
power cable
connecting
the motor
and main
board is
loose.
6.1.2 The
Manual check electric
capacity is
not
connected
or is
damaged.
6.1.3 The
motor is
damaged.
6.2.1 The
fan motor is
not properly
Manual check
connected
with the
control
139
Solution
Confirmation
method
——
Reconnect it.
Reconnect them with
——
the wire.
Replace the pressure
——
switch.
Manual Reconnect the motor
check with the power cable.
Manual Connect or replace
check the electric capacity.
Other
Replace the motor.
reasons
Manual Reconnect it
check properly.