GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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the main board of ODU. The other is to perform commissioning on a PC through professional software.
Parameters of the ODU and IDU can be simultaneously displayed and historical data can be stored and
queried with the second method. (For details about these methods, refer to respective instructions.)
(1) Commissioning Through the Main Board of ODU
When unit commissioning is performed through the main board of ODU, the main board provides
the following commissioning operation functions:
Step 1: Completely cover the front panel of ODU and open commissioning windows of all basic
modules.
Step 2: In power-off status of ODU, set the ODU to a corresponding static pressure mode according
to static pressure design requirements for outdoor engineering. For details about the setting method, see
the "Outdoor Fan Static Pressure Setting DIP Switch (SA6_ESP_S)" section. If there are not static
pressure requirements, retain the factory settings.
Step 3: In power-off status of ODU, set one module of ODU to master unit and other modules to
sub-modules. For details about the setting method, see the "Master Unit Setting DIP Switch
(SA8_MASTER-S)" section.
Step 4: If centralized control is required, set the centralized control address in power-off status of
ODU. For details about the setting method, see the "Centralized Control Address DIP Switch
(SA2_Addr-CC)" section. If centralized control is not required, retain the factory settings.
Step 5: Power on all outdoor and IDUs. If LED3 displays ―A0‖ on main boards of all modules of ODU
and the wired controller of each IDU displays ―A0‖, it indicates that the unit is in non-commissioning
status.
Step 6: Find the module with its address being ―01‖, which is the master unit. On the master unit,
press and hold "SW7" for more than five seconds to enter unit commissioning.
Step 7: Wait for the unit to automatically operate commissioning steps 01 and 02.
Exception 1: If the master unit is incorrectly set in step 01, the following faults are displayed in step
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