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