About The Test Run; To Perform A Test Run (7-Segment Display); Test Run Checks - Daikin LRYEN-AY1 Installation And Operation Manual

Air inlet/outlet
Check that the air inlet and outlet of the unit is NOT
obstructed by paper sheets, cardboard, or any other
material.
Additional refrigerant charge
The amount of refrigerant to be added to the unit shall be
written on the included "Added refrigerant" plate and
attached to the rear side of the front cover.
Installation of indoor units
Check that the units are properly installed.
Installation of capacity up unit
Check that the unit is properly installed, if applicable.
Installation date and field setting
Be sure to keep record of the installation date on the rear
of the front panel according to EN60335‑2‑40 and keep
record of the contents of the field setting(s).
17.3

About the test run

Make sure to carry out the system test operation after the first
installation.
The procedure below describes the test operation of the complete
system.
NOTICE
If a capacity up unit is installed, conduct its test run AFTER
the test run of the outdoor unit.
17.4 To perform a test run (7-segment
display)
To perform a test run of the outdoor unit
Applicable for LRYEN10*.
1 Check that all the stop valves of the outdoor unit are fully open:
gas and liquid stop valves on both refrigeration and air
conditioner side.
2 Check that all electrical components and refrigerant piping is
installed correctly, for the indoor units, outdoor unit, and (if
applicable) capacity up unit.
3 Turn ON the power supply of all units: the indoor units, outdoor
unit and (if applicable) the capacity up unit.
4 Wait for about 10 minutes until the communication between the
outdoor unit and indoor units is confirmed. The 7-segment
display is blinking during the communication test:
▪ If communication is confirmed, the display will be OFF.
▪ If communication is not confirmed, an error code will be
displayed on the remote controller of the indoor units. See
Overview" [ 4 37].
"18.1.1 Error codes:
5 Turn ON the operation switch of the outdoor unit. The
compressors and fan motors start to operate.
6 Turn ON the remote controller of the air conditioner. See the
operation manual of the indoor unit for more information about
the temperature settings.
7 Check that the unit functions without error codes. See
checks" [ 4 35].
"17.4.1 Test run
To perform a test run of the capacity up unit
Applicable for LRNUN5*.
Prerequisite: The refrigeration circuit of the outdoor unit is operating
in a stable condition.
1 Turn ON the operation switch of the capacity up unit.
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
2 Wait for about 10 minutes (after power supply ON) until the
communication between the outdoor unit and the capacity up
unit is confirmed. The 7-segment display is blinking during the
communication test:
▪ If communication is confirmed, the display will be OFF and
the compressors and fans start operating.
▪ If communication is not confirmed, an error code will be
displayed on the remote controller of the indoor units. See
Overview" [ 4 37].
"18.1.1 Error codes:
3 Check that the unit functions without error codes. See
checks" [ 4 35].
"17.4.1 Test run
17.4.1

Test run checks

Check visually
Check the following:
▪ Showcases and blower coils are blowing cold air.
▪ Air conditioners are blowing hot or cold air.
▪ The temperature of the refrigeration room is dropping.
▪ There is no short circuit in the refrigeration room.
▪ The compressor does not switch on and off in less than 10
minutes.
Check error code
Check the remote controller of the indoor units.
The remote controller displays
...
Room temperature
Error code
Nothing
Operation parameters
For a stable operation of the unit, each of the following parameters
should be in its range.
Parameter Range
Suction ̥ ≥ 10 K
superheat
(refrigeration)
Suction ≤18°C
temperature
(refrigeration)
17 Commissioning
Description
The remote controller operates
correctly.
See "18.1.1 Error codes:
Overview" [ 4 37].
Check that:
▪ Power supply of indoor unit is
turned ON.
▪ The cable of the power supply
cable is not broken and
connected correctly.
▪ The cable of the remote
controller (indoor unit) is not
broken and connected
correctly.
▪ Fuses and circuit breakers on
the indoor unit PCB did not
trip.
Root cause Countermeasu
when out of re
range
Incorrect Reselect the
selection of expansion
expansion valve valve.
at refrigeration
side.
Lack of amount Charge
of refrigerant. additional
(a)
refrigerant .
Incorrect Reselect the
selection of expansion
expansion valve valve.
at refrigeration
side.
Installation and operation manual
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