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6. TEST RUN
6.1. PRE-TEST RUN CHECK ITEMS
Before performing a test run, check the following items by refer-
ring to the Fig. 6-1.
1
Is there a gas leakage? (At pipe connections {flange connec-
tions and brazed areas})
2
Is the system charged with the specified volume of refrigerant?
3
Is the refrigerant circuit address correct?
4
Is a breaker installed at the power supply cable of every out-
door unit?
5
Are the wires connected to the terminals without looseness,
and in accordance with the specifications?
6
Are the DIP switches set up properly for the outdoor and in-
door units?
(Outdoor unit: silent operation mode, pipe length, etc.
Indoor unit: flow rate setup, temperature correction, etc.)
7
Is the 3-way valve of the outdoor unit open?
(Single unit installation: gas and liquid pipe
Multiple connections: gas, liquid and oil pipe)
8
Is power supplied to the crankcase heater for at least 12 hours
(during winter)?
After checking the above, if there are no problems, perform a test run by referring to “6-2. TEST RUN
METHOD”. If there is any problem, correct it immediately and check it again.
Perform a test run in accordance with the following procedure. The test run method consists of the following 2 patterns. Use one or the
other depending on the conditions. If an error is displayed, see “7. ERROR DISPLAY”.
1. To test run and check all the units of the refrigerant system:
Set up the DIP switches on the outdoor unit board in accordance with the specifications shown below. Check the outdoor and indoor
units to make sure they are operating normally.
DIP switch setup:
Cooling run: DIP SW 1-1: OFF
→
ON
(Heating run: DIP SW 1-2: OFF
→
ON)
* This setup is unnecessary on the slave units.
After completing the test run, restore the DIP switch to the original setup. (ON
→
OFF)
FOR YOUR INFORMATION
If multiple refrigerant systems are connected together, perform a test run by operating the DIP switch of the outdoor unit board for
every refrigerant system.
• Check that all indoor and outdoor units, which are connected by piping to the same refrigerant system, run properly.
• If there is an indoor or outdoor unit that does not run, or if an indoor or outdoor unit of some other refrigerant system runs, the
indoor or outdoor unit address or the DIP switch for the slave unit connection number is set up improperly.
• If you continue to run the system with the improper DIP switch setup, the system will malfunction. Therefore, immediately stop the
system and recheck the DIP switch setup.
2. To test run the indoor units individually:
The control method varies by remote controller. Therefore, refer to the installation instruction sheet for the respective remote controller.
6.2. TEST RUN METHOD
6.3. CHECKLIST
Criteria
Cooling: low pressure approx. 0.8 MPa
Heating: high pressure approx. 3.0 MPa
—
—
LED 3 of outdoor unit board: blinking
Temperature difference 10 degrees
No error LED flashes.
1
2
3
4
5
6
Check description
High and low pressure values are
normal.
Drain water is discharged smoothly
through the drain hose.
Indoor and outdoor unit fans are
operating.
Compressor operates after the indoor
unit operates.
Difference between inlet and outlet
temperatures is normal.
No error is displayed.
Check method
Check it with a pressure gauge.
Check it by pouring water.
Check them visually.
Check the operating sound and the
LED on the outdoor unit board.
Measure the inlet and outlet tempera-
tures.
Check the LED lamp.
Fig. 6-1
Outdoor
unit
(Slave 2)
Outdoor
unit
(Slave 1)
Outdoor
unit
(Master)
Indoor
unit
12345678
45
45
45
4567
Indoor
unit
3ø 50 Hz
400 V
1ø 50 Hz 230 V
1ø 50 Hz
230 V
Central
remote
controller
Wired remote controller
Transmission line
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