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18
8. Electrical work
Function table 1
Select unit number 00
Function table 2
Select unit numbers 01 to 04 or all units (AL [wired remote controller]/07 [wireless remote controller])
*1 When the power supply returns, the air conditioner will start 3 minutes or 1 minute later (hinge on Outdoor unit).
*2 Power failure automatic recovery initial setting depends on the connecting outdoor unit.
9. Test run
9.1. Before test run
After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of one phase in the
supply.
Use a 500-volt megohmmeter to check that the resistance between the
power supply terminals and ground is at least 1.0 MΩ
Do not carry out this test on the control wiring (low voltage circuit)
terminals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
Insulation resistance
After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 MΩ due to refrigerant accumulating
in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
2. If the insulation resistance is below 1 MΩ, the compressor is faulty or the resistance
dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm up
after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
4. If the insulation resistance rises above 1 MΩ, the compressor is not faulty.
Caution:
• The compressor will not operate unless the power supply phase connection is
correct.
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result in
severe damage to internal parts. Keep the power switch turned on during the
operational season.
Mode Settings Mode no. Setting no. Initial setting Check
Power failure automatic recovery *1*2
(AUTO RESTART FUNCTION)
Not available
01
1
Available 2
Indoor temperature detecting
Indoor unit operating average
02
1
Set by indoor unit’s remote controller 2
Remote controller’s internal sensor 3
LOSSNAY connectivity
Not Supported
03
1
Supported (indoor unit is not equipped with outdoor-air intake) 2
Supported (indoor unit is equipped with outdoor-air intake) 3
Power voltage
230V
04
1
208V 2
Auto mode
Energy saving cycle automatically enabled
05
1
Energy saving cycle automatically disabled 2
Mode Settings Mode no. Setting no. Initial setting Check
Filter sign
100 Hr
07
1
2500 Hr 2
No filter sign indicator 3
External static pressure
08
1
2
3
10
1
2
3
Note: When the function of an indoor unit were changed by function selection after the end of installation, always indicate the contents by entering a or other mark in the
appropriate check filed of the tables.
External static pressure
Setting no. of
mode no. 08
Setting no. of
mode no. 10
35 Pa [0.14 in. WG] 2 1
50 Pa [0.20 in. WG] (before shipment)
31
70 Pa [0.28 in. WG] 1 2
100 Pa [0.40 in. WG] 2 2
150 Pa [0.60 in. WG] 3 2
• The insulation resistance drops due to accumulation of refrigerant in the
compressor. The resistance will rise above 1 MΩ after the compressor is
warmed up for two to three hours.
(The time necessary to warm up the compressor varies according to
atmospheric conditions and refrigerant accumulation.)
• To operate the compressor with refrigerant accumulated in the compressor, the
compressor must be warmed up at least 12 hours to prevent breakdown.
KJ79P806H01.book 18 ページ ２０２１年１２月１３日 月曜日 午後２時１５分
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