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Performing final checks and trial operation
1 Before supplying the power, use DC 500V (AM****XV*J*)
or DC 600 V (AM****XV*F*) insulation resistance tester to
measure the power (3 phase: R, S, T/ 1 phase: L, N) terminal
and the outdoor unit grounding.
–
2 Before supplying the power, use a voltmeter and phase tester
to check the voltage and the phase.
– R, S, T terminal: Check the 460V (AM****XV*J*) or 230V
(AM****XV*F*) between wires (R-S, S-T,
T-R)
CAUTION
• Never measure the communication terminal since
communication circuit may get damaged.
• Check for short-circuit of the communication terminal with a
general circuit tester.
Installation work
Refrigerant pipe work
Drain pipe work
Electrical wiring work
Setting address
Option
58
English
• Have you checked the external surface and the inside of the outdoor unit?
• Is there any possibility of short-circuit caused by the heat of an outdoor unit?
Outdoor unit
• Is the place well-ventilated and ensures space for service?
• Is the outdoor unit fixed securely to withstand any external force?
• Have you checked the external surface and the inside of the indoor unit?
Indoor unit
• Is there enough space for service?
• Have you checked if the center of the indoor unit is ensured and it is installed horizontally?
• Have you selected correct pipes?
• Are the liquid and gas valve open?
• Is the total number of connected indoor units within the allowable range?
• Are the length and the height difference between the refrigerant pipes within the allowable range?
• Are the branch joints properly installed?
• Did you check the connection of liquid and gas pipes?
• Have you selected correct insulator for pipes and insulated them correctly?
• Did you insulate the pipes and connection part correctly?
• Is the quantity of the additional refrigerant correctly weighed in? (You must record the amount of
additional refrigerant on the service record paper placed inside of the outdoor unit.)
• Have you checked if the drain pipes of the indoor and outdoor unit are connected together?
• Have you completed the drain test?
• Is the drain pipe properly insulated?
• Are the power cable and communication cable tightened firmly on the terminal board within the
range of rated tightening torque?
• Have you checked for cross-connection of the power and communication cables?
• Have you performed the earthing work 3 to the outdoor unit?
• Did you make sure to use 2-core cable (not multi-core cable) for the communication cable?
• Is the length of the wire within allowed range?
• Is the wiring route correct?
• Did you set the address of the indoor and outdoor units properly?
• Did you set the address of the indoor and outdoor units properly? (When using multiple remote
controllers)
• If there is a possibility of the outdoor unit from vibrating, check whether the anti-vibration frame is
correctly installed.
[AM****XV*J*]
T
460V 460V
S
460V
R
[AM****XV*F*]
T
230V 230V
S
230V
R
3 Check if the R-410A indoor units are connected.
4 When N phase is not correctly connected to R, S and T phase,
over-voltage protection control will be in effect and it will cut-
off the power of the PCB. Check the power cable connection of
the N phase if the PCB is not turned on.
5 Check the following after the installation is completed.
< ELB >
< ELB >
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