Gree GMV5E Series Service Manual page 105

GREE
SN
22 Are basic modules installed on the same horizontal line?
23 Does the drainage pipe of IDU retain a 1/100 ratio of slope?
24 Is the raised height of drainage pipe of IDU less than 85 cm?
25 Is the drainage of IDU smooth?
26 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 plenum
27
chamber installed for air return?
28 Is the water pipe of IDU installed with an air exhaust vent?
29 Is "MASTER" stuck to the wired controller or panel of the master IDU?
30 Does appending refrigerants to the system comply with requirements?
31 Does the ODU run with static pressure? Has a static pressure value been set?
32 Has the ODU been preheated for more than eight hours before commissioning?
3.3.3 Step 3: Commissioning Operation
3.3.3.1 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.
2) When unit commissioning is started, the system automatically selects an operation mode
according to the environment temperature:
Cooling mode when the outdoor environment temperature is higher than 20° C.
Heating mode when the outdoor environment temperature is lower than 20° C.
3) Before starting commissioning, make sure again that stop valves of all basic modules of the ODU
have been completely opened.
4) During commissioning, the front panel of ODU must be completely covered. Otherwise,
commissioning accuracy may be affected (as shown in the following figure).
5) Before commissioning, make sure that appending refrigerants to pipes has finished completely or
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Spot Check for Commissioning
Spot Check Item
101
Qualified