Test Running - Chigo CHV Mini Series Service Manual

CHV Mini VRF 50/60Hz

5. Test Running

5.1 Inspection and confirmation before debugging
(1) Check and make sure the refrigerating pipeline and communication line connecting with the indoor and outdoor units are
connected with the same refrigerating system. Otherwise, some running faults occur.
(2) The power supply voltage is within the rated voltage of ±10%.
(3) Check and make sure the power supply line and the control line are correctly connected.
(4) Before power-on, make sure there is no short circuit.
(5) Check if all units have passed 24-hour nitrogen pressure-maintaining (40kgf /cm2) test.
(6) Make sure the debugged system is fully vacuumized, dried and filled with the refrigerant as specified.
5.2 Preparation before debugging
(1) Prepare the required refrigerant. Calculate the refilling volume of refrigerant for each set of units according to the
length of on-site liquid pipe.
(2) Prepare the system plan, system piping diagram and control wiring diagram. Mark the set address codes on the system
plan.
(3) Turn on the power supply switch of the outdoor unit in advance, and make sure it is power-on for more than 12 hours,
so that the heater heats the compressor oil.
(4) Fully open air pipe check valve, liquid pipe check valve and oil balance valve of the outdoor unit. If they are fully opened,
the machine may be damaged.
(5) Check if the power supply phase sequence of the outdoor unit is correct. Check if all dialing switches of the indoor and
outdoor units are set according to the technical requirements of the product.
(6) When the multiple indoor units are arranged, in order to distinguish the connecting systems of indoor and outdoor units,
all systems shall be named respectively and recorded on the nameplate on the electronic control box cover of the outdoor
unit.
78
Indoor unit type
Room name
Example: 2nd floor, first
system, indoor unit (A)
Remark: -2F-1A
201908