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26
EE
EN
14. Test run
14.1. 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
resistanceislessthan1.0MΩ.
After installation or after the power source to the unit has been cut
for an extended period, the insulation resistance will drop below 1
MΩduetorefrigerantaccumulatinginthecompressor.Thisisnota
malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the
insulation resistance of the compressor.
2.Iftheinsulationresistanceisbelow1MΩ,thecompressorisfaulty
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.
• The insulation resistance drops due to accumulation of refrigerant
inthecompressor.Theresistancewillriseabove1MΩafterthe
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.
4.Iftheinsulationresistancerisesabove1MΩ,thecompressoris
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.
14.3. Self-check
Refer to the installation manual that comes with each remote controller for details.
RF thermostat is not established.
[Output pattern A] Errors detected by indoor unit
IR wireless remote controller
Wired remote controller
RF thermostat
Symptom Remark
Beeper sounds/OPERATION
INDICATORlampashes
(Number of times)
Check code
1 P1 Intake sensor error
2 P2, P9 Pipe (Liquid or 2-phase pipe) sensor error
3 E6, E7 Indoor/outdoor unit communication error
4 P4 Drain sensor error
5 P5 Drain pump error
6 P6 Freezing/Overheating safeguard operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4 Remote controller signal receiving error
10 – –
11 Pb Fan motor error
12 Fb Indoor unit control system error (memory error, etc.)
No sound – – No corresponding
14.2. Test run
Refer to the installation manual that comes with each remote controller for details.
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