GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
112
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.
If no exception is detected, the main board is displayed as follows and the unit automatically enters the
next commissioning step.
06_Component
detection for
ODU
The system detects
that no ODU
component fails 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:
06_Component
detection for
ODU
The system detects
component failure
of ODU.
For details about the above troubleshooting method, refer to the "Troubleshooting Method" part.
Step 11: Unit commissioning step 07 is component detection for IDU.
If no exception is detected, the main board is displayed as follows and the unit automatically enters the
next commissioning step.
07_Component
detection for
IDU
The system detects
that no IDU
component fails
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:
07_Component
detection for
IDU
XXXX/Corresponding
fault code
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).
For details about the above troubleshooting method, refer to the "Troubleshooting Method" part.
Step 12: Unit commissioning step 08 is compressor preheating confirmation.
If it is detected that the compressor preheating period is more than eight hours, the main board is
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