CHIGO VRF System Commissioning

Content 01 Check before start 02 Check Operation

Power wire / Signal wire 1.Check before start Power wire / Signal wire All the electric wiring is finished? Wire specification are correct? Power wire are well insulation? Well connection? Refrigerant pipe & insulation Gastight & vacuum dry Additional refrigerant charge Check valves

Power wire / Signal wire 1.Check before start Power wire / Signal wire Refrigerant pipe & insulation Pipes diameters are correct? Pipes are well insulation? Gastight & vacuum dry Additional refrigerant charge Check valves

Power wire / Signal wire 1.Check before start Power wire / Signal wire Refrigerant pipe & insulation Gastight test has been passed? Vacuum dry has been done? Gastight & vacuum dry Additional refrigerant charge Check valves

Power wire / Signal wire 1.Check before start Power wire / Signal wire Refrigerant pipe & insulation Refrigerant has been charged correctly? Gastight & vacuum dry Additional refrigerant charge Check valves

Power wire / Signal wire 1.Check before start Power wire / Signal wire Refrigerant pipe & insulation Outdoor valves are opened? All the fans rotate normally? Gastight & vacuum dry Additional refrigerant charge Check valves

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat At least 24 hours Error check Trial operation Operation test Hand to user

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat Check if there’s any error code display on the PCB of IDU or ODU? Check if the Qty. of IDUs on the ODU LED display is same with actual Qty. or not? Error check Trial operation Operation test Hand to user

Power on whole system ，Check address and capacity code 2.Check Operation Power on whole system ，Check address and capacity code The master ODU LED display the total amount of online indoor units If display No. is not equal to the real Qty. ->Some indoor units have same address or communication wire have problem.

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat Turn-on all indoor units Error check Trial operation Operation test Hand to user

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat Check indoor units: Setting 17℃ in cooling model High speed Running more than 4 hours Check Temp. -> Temp. difference between air intake and outlet of each indoor unit should be bigger than 10℃。 Error check Trial operation Operation test Hand to user

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat Check for outdoor unit: Discharge and suction temperature of compressors Pressure of systems Running current Any abnormal noise, vibration Record the operation parameter Error check Trial operation Operation test Hand to user

System pressure and temperature check 2.Check Operation System pressure and temperature check Inverter VRF system at Cooling mode ( reference data) R410A OD20 OD30 OD35 OD43 High pressure (MPa) 2.0~2.5 2.3~2.7 2.8~3.0 3.4~3.8 Low pressure (MPa) 0.8~0.95 0.85~1.0 1.0~1.45 Discharge temp.(℃) 65~70 68~73 70～80 75~90 Suction temp.(℃) 10~14 11~14 11～14 15~25 Indoor air outlet (℃) 12~15 degree (T1 is around 21~27) temp. difference between return and outlet (ΔT) 9~12

2.Check Operation When press the check button, the LED will display operating parameters: LED display Check button

2.Check Operation Press “check” button, outdoor PCB LED will displays operation information Sequence System operation parameters Remarks 1st This outdoor unit address 0, 1, 2, 3, 4 2nd This outdoor unit capacity 8HP, 10HP, 12HP, 14HP, 16HP 3rd Number of online outdoor units Available for master unit only 4th Total capacity of outdoor units 5th Total capacity demand of indoor units 6th Amended capacity demand for the master unit 7th Running mode 0:OFF/ FAN ONLY 2:COOLING 3:HEATING 4:FORCED COOLING 8th Capacity output of this outdoor unit Displays in % 9th Fan speed 0 1 2 3 4 5 6 7 8 9 10th Average temperature of evaporators Actual value 11th Temperature of condenser outlet

2.Check Operation Sequence System operation parameters Remarks 12th Ambient temperature Actual value 13th Discharge temperature of inverter compressor 14th Discharge temperature of fixed compressor 1 15th Discharge temperature of fixed compressor 2 16th Current of inverter compressor 17th Current of fixed compressor 1 18th Current of fixed compressor 2 19th Open angle of EXV_A Actual value = Display value × 8 20th Discharge gas pressure Actual value = Display value × 0.1Mpa 21st Transformer output current 22st Transformer output voltage 23nd The running mode 0 Heating prior 1Cooling prior 2Start prior 3Only heating 4Only cooling 24rd Number of connected indoor units 25rd The last error code or protection code Displays ‘00’, if no error or protection 26rd -- Ends

Preheat Error check Trial operation Operation test Hand to user 2.Check Operation Preheat Daily operation and maintenance explanation Error check Trial operation Operation test Hand to user

Thank you