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COMMISSIONING
12 COMMISSIONING
12.1 PRELIMINARY CHECkS
When installation is completed, perform test run according to the
procedure described in the installation and operation manual of
the remote control switch PC-ARFP1E, and hand over the system
to the customer. Perform test run regarding indoor units one by
one in order. Test run is also possible from the outdoor unit.
!
C A U T I O N
•
Make sure the refrigerant pipes and communication cables between
the outdoor and indoor units are connected to the same refrigeration
cycle. Failure to do so could lead to abnormal operations or a serious
accident.
•
Make sure the main power supply switch has been on for over
12 hours to heat up the compressor oil using the heating elements.
•
Make sure the electric components in the installation (earth leakage
breaker, circuit breaker, cables, connectors, cable terminals and main
power switches) have been selected correctly in line with the electrical
data given in this Manual. Also make sure that these components are
compliant with national and local codes.
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N O T E
•
Check shielded cables (> 0.75 mm
wiring to avoid electromagnetic noise. (Shielded cable must be less
than 1000 m in total length and its size must be compliant with local
codes.)
•
Check the connection of the power wiring terminals and supply
voltage according to each model specification.
Do not operate the system until all the check points have been
cleared:
•
Check that the outdoor unit and the indoor units have the
same cycle number on the refrigerant cycle DSW.
•
Check the end resistance cancellation DSW of the outdoor
unit of the installation.
•
Confirm that the DSW setting on the printed circuit board of
the indoor units and the outdoor units are correct.
•
Make sure the electrical resistance is greater than 1 MΩ
by measuring the resistance between the ground and the
terminal of the electrical components. If not, do not use
the system until the electrical leak has been detected and
repaired. Do not impress the voltage on the terminals for
transmission 1 and 2. Where the total insulation resistance of
the unit is below 1 MΩ, the compressor insulation resistance
may be low due to the refrigerant held in the compressor.
This may occur if the unit is not used for long periods.
-
Disconnect the compressor cables and measure the
insulation resistance of the compressor. If the resistance
value is greater than 1 MΩ, the insulation fault has
occurred in another electrical component.
-
If the insulation resistance is below 1 MΩ, disconnect the
compressor cable on the inverter PCB. Then switch on
the main power supply to apply current to the crankcase
heating elements. Once current has been received for
more than 3 hours, re-measure the insulation resistance.
(Current may be required for longer, depending on
the air conditions, the pipe length or the condition of
39
PMML0511 rev.1 - 06/2019
) for communication installation
2
the refrigerant). Check the insulation resistance and
re-connect the compressor. Where the earth leakage
breaker is tripped, check the recommended size: see in
chapter "11.2.2 Cable sizes and main breaker switch".
•
Check that all components in the system are correctly
connected to the power line. If the outdoor unit is not
correctly connected, the alarm code "05" will appear.
•
Check to ensure that the stop valves of the outdoor unit are
fully opened, and then start the system.
•
Check to ensure that the switch on the main power
source has been ON for more than 12 hours, to warm the
compressor oil by the oil heater.
Pay attention to the following items while the system is running:
•
Do not touch any of the parts by hand at the discharge gas
side, since the compressor chamber and the pipes at the
discharge side are heated higher than 90°C.
•
DO NOT PUSH THE BUTTON OF THE MAGNETIC
SWITCH(ES), it will cause a serious accident.
•
Do not touch any electrical components for more than three
minutes after turning OFF the main switch.
•
Confirm that the gas line stop valve and the liquid line stop
valve are fully open.
•
Confirm that the leakage of the refrigerant does not exist.
The flare nuts are sometimes loosened by vibration.
•
Check whether or not the electrical wiring of the indoor units
and the outdoor units are connected as shown in the chapter
"11 Electrical wiring".
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