Gree GMV-224WM/B-X, Service Manual

Page: 110 / 375

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
107
IDUs and ODUs.
db On 05 On OC On
The system completes
detection and
automatically enters the
next step.
06_Internal
component
detection for
basic
modules
db On 06 On
Corresponding
fault code On
The system detects
component failure of
ODU.
db On 06 On OC On
The system detects that
no ODU component fails
and automatically enters
the next step.
07_Compon
ent detection
for IDU
db On 07 On
XXXX/
Corresponding
fault code On
The system detects
component failure of
IDU. "XXXX" indicates
the project number of the
faulty IDU. The
corresponding fault code
is displayed after three
seconds. For example, if
a d5 fault occurs on IDU
100, LED3 will circularly
display "01", "00" (two
seconds later), and "d5"
(two seconds later).
db On 07 On OC On
The system detects that
no IDU component fails
and automatically enters
the next step.
08_Compres
sor
preheating
confirmation db On 08 On U0 On
The system gives a
prompt if the compressor
preheating period is less
than eight hours.
db On 08 On OC On
The system detects that
the compressor
preheating period is
more than eight hours
and automatically enters
the next step.
09_Pre-start
up refrigerant
detection
db On 09 On U4 On
The system detects
insufficient refrigerants
and stops to balance the
pressure lower than 0.3
MPa.
db On 09 On OC On
The system detects that
refrigerants are normal
and automatically enters
the next step.
10_Pre-start
up ODU
valve status
detection
db On 10 On ON On
Outdoor unit valves are
being opened.
db On 10 On U6 On
Outdoor unit valves have
not been completely
opened.
db On 10 On OC On
Outdoor unit valves have
been properly opened.
11_Manually
calculated
refrigerant
perfusion
status
db On 11 On AE On
The refrigerant perfusion
status is manually
calculated (appended
refrigerants must be
accurately calculated).
12_Unit
commissioni
ng startup
confirmation
db On 12 On AP Blinking
The system waits for a
unit commissioning
startup command.
db On 12 On AE On
The unit is set to
manually-calculated