GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
135
04_Indoor unit quantity confirmation
It is very important to correctly confirm the number of IDUs. If the confirmed quantity is
inconsistent with the actual quantity, the system may improperly run.
Step 9: Unit commissioning step 05 is internal communication detection.
If no exception is detected, the main board is displayed as follows and the unit automatically enters
the next commissioning step.
05_Internal
communication
detection
The system
completes detection
and automatically
enters the next step.
If an exception is detected, the unit retains the current status and waits for manual troubleshooting.
Corresponding faults include:
05_Internal
communication
detection
The system detects
communication
failure between
master unit and
inverter compressor
driver.
The system detects
communication
failure between
master unit and
inverter fan driver.
The rated capacity
ratio is over-high
between indoor and
ODUs.
The rated capacity
ratio is over-low
between indoor and
ODUs.
For details about the above troubleshooting method, refer to the "Troubleshooting Method" part.
Step 10: Unit commissioning step 06 is component detection for ODU.