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DC Inverter Multi
VRF Service Manual
Step 4: Make sure that the communication is normal, and then record each parameter. Finally, start one indoor unit
every 5 min.
Step 5: According to reference value of parameter, check if there is any abnormal parameter. If there is, nd the cause
and solve it. Then, start the debugging again and if everything is normal, measure and record each parameter after 30min.
Step 6: Record each parameter when the capacity is just shifted and after 30min, measure and record these parameters
again. Finally, save the data of monitoring software and the debugging is nished. If there is any abnormality, nd the
cause and solve it. Then, start the debugging again
Note: during debugging, listen carefully for the sound from indoor and outdoor fans as well as the compressor to
check if they are normal.
Abnormal sound?
Indoor unit
Outdoor unit
3�5 Running of Heating Mode
If environmental conditions are proper, after the debugging of cooling mode has been nished, the system can be
shifted to heating mode directly. The system will run with max capacity of indoor unit and with min. capacity of indoor
unit separately. The debugging method is as cooling mode.
Note: if the environmental conditions are not proper for running of cooling mode, start the debugging of heating
mode directly which is as the debugging of cooling mode.
3.6 When the debugging is nished, sort out and save the data. Record the trouble and troubleshooting during the
debugging for future reference� Then, make a debugging report and turn over it to users�
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