GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
105
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 for
more than 70%.
Has the compressor
been preheated for
more than eight
hours?
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