GMV DC Inverter VRF
52
Description of each stage of debugging progress
10_Status
judgments of
outdoor valves
before startup
Outdoor valves are being turned on.
Outdoor valves are not fully turned on.
Outdoor valves are turned on normally.
11_Calculate
refrigerant
quantity
manually
Calculate the refrigerant quantity
manually and confirm the perfusion
status of refrigerant (the quantity of
refrigerant added into the system must
be recorded accurately).
12_Confirm
debugging
startup
Ready for units to start debugging.
Manual calculation of refrigerant
quantity is set up.
Debugging is enabled in cooling mode
(debugging mode, auto-selected by
system).
Error occurs during debugging in
cooling mode.
Error of other modules occurs during
debugging in cooling mode.
Outdoor pipeline and valves are not
normal.
System detects error in indoor pipeline.
XXXX is the project no. of the faulted
IDU. 3s later, error code U8 is
displayed. For example, IDU no. 100
has U8 error, then LED3 displays like
this: 01 (2s later) 00 (2s later) U8, and
repeat again.
Debugging is enabled in heating mode
(debugging mode, auto-selected by
system).
Error occurs during debugging in
heating mode.
Error of other modules occurs during
debugging in heating mode.
Outdoor pipeline and valves are not
normal.
System detects error in indoor pipeline.
XXXX is the project no. of the faulted
IDU. 3s later, error code U8 is
displayed. For example, IDU no. 100
has U8 error, then LED3 displays like
this: 01 (2s later) 00 (2s later) U8, and
repeat again.
Debugging is finished. System is on
standby condition. LED1 displays
module address. LED2 and LED3
display “OF”.