GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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Note: During commissioning, users must listen to the operating sound of outdoor and indoor fans and
compressors to check for exceptions.
3.4 Operations after Commissioning
Sort and save data. Make detailed records of exceptions and troubleshooting methods during
commissioning for later maintenance and query. At last, make a commissioning report and hand it over
to users.
3.5 Precautions to Let Users Know after Commissioning
Let users know where the master IDU is located and stick a label to the master IDU. Tell users that
modes of other IDUs are limited by the mode of master IDU.
An ODU that has been in power-off status for more than 24 hours should be preheated for more than
eight hours before startup to prevent damaging compressors.
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