GMV DC Inverter VRF 
54 
4.2 Notices for Unit Debugging 
(1)  Before conducting the debugging, please ensure that the compressor has been preheated 
for more than 2 hours, and check whether the preheating is normal by hand. Debugging can 
be started up only when the preheating is normal, otherwise the compressor may be 
damaged.   
 
Fig. 4.2.1   
(2)  When starting up the debugging, the system automatically selects the operating mode 
according to the current ambient temperature. 
(3)  When debugging, the front panel of the outdoor unit must be completely closed, otherwise it 
will affect the accuracy of debugging (as shown in the Fig. as below). 
 
Fig. 4.2.2