GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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If this fault occurs, the number of the new AP1 is identical to that of a unit within the network. Manually
change it to the original number of the faulty AP1 or a unique number. There are three methods to
change project number:
Method 1: If the IDU is configured with wired control, set P42 to a new project number.
Method 2: If the IDU is configured with lamp board, use the special control YV1L1 to set P42 to a new
project number.
Method 3: If the IDU is configured with the Debugger, configure a new project number through this
software.
Tip:
If there are N units within the network, the units should be numbered from N+1.
Special situation:
In some cases, the created project number is identical to that of a unit within the network. In this case,
you can use the ―one-key IDU project number reset‖ function. However, this function will cause the
project number of the entire system to be re-distributed; thus, original number will be changed. If you do
not expect this result, forbid the use of this function and replace the AP1 again.
Methods to use the ―one-key IDU project number reset‖ function:
Method 1: If the IDU is configured with wired control, set P45 to reset IDU project number through one
key function.
Method 2: If the IDU is configured with lamp board, use the special control YV1L1 to set P45 and reset
IDU project number through one key function.
Method 3: On the AP1 of the master ODU, press and hold SW5 for 10 seconds at least to clear all
project numbers of the IDUs and then redistribute project numbers. Other parameters are kept
unchanged.
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