8. TEST OPERATION 8-1. Procedure and Summary of Test Operation A test operation is executed in the following procedure. When a trouble or an error occurs in each step, remove causes of a trouble or an error referring to the section “9. Troubleshooting”. Check before test operation Check the basic items, mainly the installation work. Be sure to enter the check results in the check list 1 and 2. Check the main power supply is turned on. It is the check after the power has been turned on. Check the refrigerant circuit system is normally turned on. Start the address setup in the outdoor/indoor units. (NOTE) The operation does not start by only power-ON. Set up the addresses. Carry out a test operation. Check air blowing and cooling/heating operation in the indoor unit. Test operation END 8-2. Check Items before Test Operation 2 Prior to the test operation, check the following items so that there is no trouble in the installation work. <Main check items for electric wiring> 4 Header unit (A) 3 Follower unit (B) U3 U4 1 The communication system differs from that of R22 or R407 refrigerant “Modular Multi system” air conditioner. Check again cautious points on wiring. Outdoor unit 1. In case that a center control system is not connected: 3-phase 380-415V Leak interception U1 U2 Follower unit (C) U3 U4 U5 U6 U1 U2 U3 U4 U5 U6 U1 U2 U5 U6 Earth 5 5 Main switch U1 U2 Indoor unit A B U1 U2 U1 U2 A B A B U1 U2 A B 1-phase 230V Leak interception Main switch No. Remote controller Main check items Check Are indoor and outdoor communication lines of the header unit connected to U1/U2 terminals? Is the relay connector between U1/U2 terminal and U3/U4 terminal removed? (Set up at shipment from the factory) Is the communication line between each outdoor units connected to U5/U6 terminal? Is the terminal resistance (SW30-2) on the interface P.C. board of the header unit turned on? (Set up at shipment from the factory) Is the end terminal of the shield cable grounded? NOTE) The above figure does not show all the electric cables. For details, refer to the installation manuals for outdoor unit, indoor unit, remote controller, or optional devices. 88 2. In case that a central control system is connected (Before address setup) Central control units U1 U2 U3 U4 4 Other refrigerant line 2 5 Header unit (A) U3 U4 Other refrigerant line 3 Follower unit (B) U3 U4 Follower unit (C) U3 U4 U3 U4 Outdoor unit U1 U2 U5 U6 U1 U2 1 U5 U6 U1 U2 U5 U6 U1 U2 U5 U6 Earth To indoor unit 3-phase 380-415V Leak interception 6 6 Main switch U1 U2 U1 U2 U1 U2 U1 U2 Indoor unit A B A B A B Remote controller Remote controller Remote controller A B 1-phase 230V Leak interception Main switch No. Main check items Are indoor and outdoor communication lines of the header unit connected to U1/U2 terminals? Is the relay connector between U1/U2 terminal and U3/U4 terminal removed? (Set up at shipment from the factory) (Before address setup, remove the relay connector.) Is the communication line between outdoor and indoor units connected to U5/U6 terminal? Is the communication line of the central control system connected to the header unit U3/U4 terminals of each refrigerant line? (The communication line of the central control system may be connected to the communication lines of the indoor/outdoor communication lines.) Check Is the terminal resistance (SW30-2) on the interface P.C. board of the header unit turned on? (Set up at shipment from the factory) (After address setup, turn off SW30-2 of the header unit except the smallest unit after check of trial operation.) Is the end terminal of the shield cable grounded? When the refrigerant line and the central control system of the custom air conditioner are connected: → Are TCC-LINK adaptors correctly connected? → When the digital inverter air conditioner operates with group operation, twin, or triple operation, are the adopters connected to the header unit of the indoor unit? NOTE) The above figure does not show all the electric cables. For details, refer to the installation manuals for outdoor unit, indoor unit, remote controller, or optional devices. 89 <Check list 1> • Using the “Check list 1”, check there is no trouble in the installation work. Is capacity of the leak breaker appropriate? Outdoor total capacity XXXX A Is diameter of the power cable correct? Is control communication line correct? Header unit (A) XXXX A Follower unit (B) XXXX A Follower unit (C) XXXX A Follower unit (D) XXXX A Header unit (A) XXXX mm² Follower unit (B) XXXX mm² Follower unit (C) XXXX mm² Follower unit (D) XXXX mm² Indoor unit XXXX A Indoor unit XXXX mm² Indoor –outdoor connection terminals (U1, U2) XXXX Outdoor–outdoor connection terminals (U5, U6) XXXX Central control system connection terminals (U3, U4) XXXX Is power of indoor units supplied collectively? Is earth grounded Is insulation good? Is the main power voltage good? XXXX V Is diameter of connecting pipe correct? Is the branch kit correct? Is drain water of the indoor unit arranged so that it flows without accumulation? Is thermal insulation of pipes good? (Connecting pipes, Branch kit) Is not short-circuit of discharge air in indoor/outdoor units? After airtight test for pipes, are vacuuming and adding of refrigerant executed? Are valves of all the outdoor units fully opened? Gas side Liquid side Balance side Header unit (A) XXXX XXXX XXXX Follower unit (B) XXXX XXXX XXXX Follower unit (C) XXXX XXXX XXXX Follower unit (D) XXXX XXXX XXXX 90 • Check the additional amount of refrigerant. <Check list 2> Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diameter at liquid side and the pipe length to be connected and the corrective amount of refrigerant (C) by the system capacity. Additional amount Actual liquid Additional amount of Corrective amount of = × + of refrigerant pipe length refrigerant per liquid pipe 1m refrigerant by system capacity (A) (C) Firstly enter the total length for each liquid pipe in the following table, and then calculate the additional amount of refrigerant by pipe length. <Additional amount of refrigerant by pipe length> Pipe dia at liquid side Standard amount of refrigerant kg/m Total pipe length at each liquid side Additional amount of refrigerant pipe dia at each liquid side kg Ø6.4 0.025 × = kg Ø9.5 0.055 × = kg Ø12.7 0.105 × = kg Ø15.9 0.160 × = kg Ø19.0 0.250 × = kg Ø22.2 0.3505 × = kg Additional amount of refrigerant by pipe length (A) kg Next, refer to the following table for the corrective amount of refrigerant (C) by system capacity. <Corrective amount of refrigerant by system capacity> System horse power HP Normal type Unit 1 Unit 2 Unit 3 Unit 4 Corrective amount of refrigerant (C) kg System horse power HP Normal type Unit 1 Unit 2 Unit 3 Unit 4 Corrective amount of refrigerant (C) kg 5 5 0 28 10 10 8 –2.0 6 6 0 30 10 10 10 0 8 8 1.5 32 8 8 8 10 10 2.5 32 12 10 10 12 12 3.5 34 10 8 8 14 8 6 0 34 12 12 10 16 8 8 0 36 10 10 8 18 10 8 0 36 12 12 12 20 10 10 3.0 38 10 10 22 8 8 6 0 40 10 22 12 10 5.0 42 24 8 8 8 –4.0 44 24 12 12 7.0 26 10 8 –4.0 8 8 –6.0 1.0 8 –6.0 3.0 8 –6.0 10 8 –6.0 10 10 10 –5.0 12 10 10 10 –4.0 12 12 10 10 –2.0 46 12 12 12 10 0 48 12 12 12 12 2.0 4.0 Lastly add the additional amount of refrigerant by pipe length (A) to the corrective amount of refrigerant by system capacity (C). It is the final additional amount of refrigerant. As the result, If minus sign is indicated, do not add the refrigerant (=0kg). <Additional amount of refrigerant> Additional amount of refrigerant by pipe length (A) kg Corrective amount of refrigerant by system HP (C) kg Additional amount of refrigerant kg 91
