Gree GMV5 Series Service Manual page 107

10 Is the total length of pipes less than 1000 m?
Is the spacing between the ODU and the first disperse pipe larger than 90 m? If
11 yes, is the corresponding pipe diameter increased?
Is the spacing between the IDU and the nearest disperse pipe larger than 10 m?
12 If yes, is the corresponding pipe diameter increased?
13 Does the wall thickness of copper tubes meet design requirements?
14 Are disperse pipes horizontal or vertical?
Does the diameter of cables connected with IDUs and ODUs comply with unit
15 design requirements?
16 Do the circuit breaker and leakage switch comply with unit design requirements?
17 Is the spacing between the power cable and the TV set larger than 1 m?
18 Do communication cable materials comply with unit design requirements?
19 Are all communication cables of IDUs and ODUs serially connected?
Is the last-communicating IDU installed with a communication-matched
20 resistance?
21 What is the load of the selected IDU model?
Is the foundation of ODU firm? Do shock absorption and water drainage comply
22 with requirements?
23 Are basic modules installed on the same horizontal line?
24 Does the drainage pipe of IDU retain a 1/100 ratio of slope?
25 Is the raised height of drainage pipe of IDU less than 85 cm?
26 Is the drainage of IDU smooth?
27 Does a U-shaped trap exist in the drainage pipe of IDU?
Are the air outlet and air return vent of IDU connected with soft connectors? Is a
28 plenum chamber installed for air return?
29 Is the water pipe of IDU installed with an air exhaust vent?
30 Is "MASTER" stuck to the wired controller or panel of the master IDU?
31 Does appending refrigerants to the system comply with requirements?
32 Does the ODU run with static pressure? Has a static pressure value been set?
33 Has the ODU been preheated for more than eight hours before commissioning?
Step 3: Commissioning Operation
3.1 Precautions
1) Before starting commissioning, make sure that the unit compressor has been preheated for more than
eight hours and check whether preheating is normal by touching. Commissioning can be started only
when preheating is normal. Otherwise, the compressor may be damaged. Commissioning must be
performed or guided by professional personnel.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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