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9
9
. Test Run
1
1
Before a Test Run
2
2
Test-Run Method
Run a test by using DIPSW3-1, 2 on the controller board in the outdoor unit controller box.
1
Check for refrigerant leak and loose power supply/transmission connections.
2
Make sure that the resistance between the power supply terminal block and the ground exceeds 1.0M
Ω
by measuring it with
a DC500V megger.
Notes: 1. Do not run a test if insulation resistance is under 1.0M
Ω
.
2. Do not use megger on transmission terminal block, as it will damage the main board.
3. Immediately after installation or when left without being powered for an extended period of time, insulation resist-
ance between the power supply terminal block and the ground may drop near 1M
Ω
due to an accumulation of re-
frigerant in the compressor.
4. If insulation resistance is at least 1M
Ω
, by supplying power to the crankcase heater for no less than 12 hours, re-
frigerant in the compressor will evaporate, and the resistance will go up.
3
Make sure that the ball valves on both gas and liquid sides are fully open.
Notes: Be sure to keep the cap on.
5
Make sure that the three power supply wires are connected correctly, and also check the voltage between each phase.
Notes: Error codes 4102 or 4103 will be displayed if improper connections are made (absent or reverse phase).
6
Turn on the main switch to power the crankcase heater at least 12 hours before test run.
Notes: Shorter powering time will cause compressor problems.
4
Make sure that gas pipes and liquid pipes in a 2-refrigerant circuit are not cross-connected.
Turn on the power at least 12 hours before test run.
→
It will take approximately one minute until the unit is operable.
Leave the unit on for 12 hours (to power the outdoor unit compressor crankcase heater).
Run an individual test on each of the refrigerant circuit to make sure that pipes or wires are not cross-connected.
1
First, run a test on No.1-side refrigerant circuit.
2
Set the Normal/Maintenance Switch of the indoor unit to Maintenance.
3
While the unit is stopped, set Slide SWA on
the address board of No.2-side
refrigerant circuit to 3. (See Note 1).
4
Run a
test
, using the remote controller for the indoor unit.
→
Indoor fan will start, and outdoor unit of only No.1 refrigerant circuit will start operating. During this time, the outdoor unit
on No.2-side refrigerant circuit will remain at a halt.
→
Confirm that indoor fan and outdoor unit in the No.1-side refrigerant circuit operate normally.
→
Confirm that pipes or wires are connected correctly.
5
Stop the operation with the remote controller for the indoor unit.
→
End of No.1 refrigerant circuit test run.
6
Run a test on No.2-side refrigerant circuit.
7
While the unit is stopped, set the slide switch SWA on
the controller board of No.1-side refrigerant circuit
to 3, and slide
switch SWA on the controller board of No.2-side refrigerant circuit to 1.
8
Run a
test
by using the remote controller in the indoor unit.
→
Indoor fan will start, and only the outdoor unit in No.2-side refrigerant circuit will start. During this time, the outdoor unit in
No.1-side refrigerant circuit is stopped.
→
Confirm that indoor fan and outdoor unit of No.2-side refrigerant circuit are operating normally.
→
Confirm that pipes and wires are connected correctly.
9
Stop the test, using the remote controller for the indoor unit.
→
End of No.2 refrigerant circuit test run.
0
While the unit is stopped, set the slide SWA on
the address board of No.1-side refrigerant circuit
to 1.
1
Finally, run simultaneous
tests
in both No.1- and No.2-side refrigerant circuit.
2
Indoor fan will start, and outdoor units in both No.1- and No.2-side refrigerant circuit will start.
→
Confirm that indoor fan and both outdoor units operate normally.
3
Stop the test, using the remote controller in the indoor unit
→
End of test
4
Switch the Normal/Maintenance switch inside indoor unit back to Normal.
→
Be sure to set the Normal/Maintenance switch back to Normal and SWA on the address boards of both No.1 and No.2
units back to 1.
Procedures
