1. CHIGO VRF System
Commissioning

2. Content
01 Check before start
02 Check Operation

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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.

11. 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

12. 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

13. 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

14. 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

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

16. 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
10th
Average temperature of evaporators
Actual value
11th
Temperature of condenser outlet

17. 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

18. 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

19. Thank you