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14. Check and test
14-1. Test run
¢ Pre-test run check items
Check
column
Is the outdoor unit securely installed?
Have you performed gas leakage inspection?
(Connection joints of various pipes (flange connection, brazing))
Is the heat insulation done completely?
(Gas pipe, liquid pipe, drain hose extension on indoor unit side etc)
Is the water discharging from drain without any problems?
Are the cables connected correctly?
Are the cables as per specifications?
Is the earth wire connected accurately?
Are there any obstacles blocking the suction gate, and outlet of the indoor/outdoor units?
Have you filled the specified amount of refrigerant?
Are the stop valves of gas pipe and liquid pipe fully open?
Has the power been supplied to crankcase heater for more than 6 hours?
¢ Test operation method
Be sure to configure test run settings only when the outdoor unit has stopped operating.
Notices:
• Depending on the communication status between the indoor and outdoor units, it may take
several minutes for the system to start operating after settings for the test run are complete.
• After the test run settings are complete, the outdoor units and the connected indoor units will
start operating. Room temperature control will not activate during test operation (continuous
operation).
• If a knocking sound can be heard in the liquid compression of the compressor, stop the unit
immediately and then energize the crank case heater for a sufficient length of time before
restarting the operation.
Test operation setting method (It can be performed in the following two ways)
• Set with test operation setting (refer to installation instructions manual of indoor unit for further
details) available in the remote controller.
• "Cooling operation" and "Heating operation" can be set using SELECT button and ENTER but-
ton available on the board of display unit.
(*Make sure to perform the first test operation with cooling operation.)
Set as per the procedure given below.
Symbols in the following table indicate LED status.
"○": Lights off, "●": Lights on
1. Turn on the power of the outdoor unit and enter standby mode.
"POWER/MODE" Lamp lights up.
PUMP
POWER
ERROR
DOWN
MODE
(L1)
○
○
●
- 78 -
Check item
LOW
PEAK
NOISE
CUT
(L2)
(L3)
(L4)
(L5)
○
○
○
○
(L6)
○
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