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25
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12. Test run
12.1. Typical unit operation
Items to be checked before a test run
• Measure the insulation resistance between the power supply terminal block and the ground with a 500 V ohmmeter, and check that it reads at least 1.0 MΩ.
-
If the insulation resistance is 1.0 MΩ or below, turn on the main power to the unit and energize the compressor for at least 12 hours.
Warning:
• The compressor is energized when the main power to the unit is turned on. Make sure to turn off the power before disconnecting the compressor power
source cable from the terminal block to measure the insulation resistance.
• If the insulation resistance is 1.0 MΩ or below, do not operate the unit.
•
Turn on the power at least 12 hours before performing a test run.
- Doing so will energize the compressor and evaporate the refrigerant in the compressor.
Caution:
• Insufficient energizing may result in compressor damage.
The events listed in the table below are normal occurrences and do not represent operation problems.
Events
Display on
remote controller
Cause
Auto vane automatically switches air flow
direction.
Normal display
The auto vane may switch over to horizontal air flow operation from vertical air flow operation
in cooling mode if the vertical air flow operation has been running for 1 hour. At defrost in
heating mode or immediately after heating start-up/shutdown, the auto vane automatically
switches to horizontal air flow for a short time.
Indoor unit remote controller displays “HO”
or “PLEASE WAIT” for about 5 minutes after
turning on the universal power supply.
“HO” or
“PLEASE WAIT”
flashes
System is performing the initial operating sequence. Remote controller will be operable again
after “HO” or “PLEASE WAIT” stops flashing and disappears.
Drain pump continues to operate even after
the unit has been turned off.
No display
After turning off the cooling operation, unit continues to operate the drain pump for 3 minutes,
then shuts it off.
Unit also continues to operate drain pump if condensate has been generated.
Immediately after startup, the indoor unit emits
the sound of the refrigerant flow.
Normal display
Unstable flow of the refrigerant emits a sound. This is temporary and does not imply a
problem.
12.2. Outdoor unit function setting
Function settings can be made by setting SW6 on the outdoor unit control board.
<SW6 setting item list>
Item
Switch
Setting content
SW6 setting
Switch setting timing
OFF
ON
Setting
SW6-1
–
–
–
–
SW6-2
–
–
–
–
SW6-3
–
–
–
–
SW6-4
High static pressure setting (unit model selection)
Standard static pressure
High static pressure
Before being energized (*1)
SW6-5 High static pressure setting (selection of 60 Pa or 30 Pa)
60 Pa
30 Pa
Before being energized (*1)
SW6-6
–
–
–
–
SW6-7
Low-noise mode selection
Performance priority
Low-noise priority
Any time after being energized (*2)
SW6-8
Selection of Low-noise or Demand
Low-noise (Night)
Demand
Before being energized (*1)
SW6-9
–
–
–
–
SW6-10 Selection of Diagnostic display or Function detail setting
Diagnostic display
Function detail setting Any time after being energized (*2)
*1 The DIPSW setting can be made before the unit is energized.
*2 The DIPSW setting can be made any time after the unit is energized.
Note:
• Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.