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17 Commissioning
Parameter
Range
Subcool
≥2 K
(if applicable)
≤5°C
Liquid
temperature of
the capacity up
unit
(a)
Charge additional refrigerant until all parameters are within their
range.
Check operation parameters
Action
Push button
Check that the 7-
segment display is
OFF. This is the initial
condition after the
communication has
been confirmed.
To return to the initial
state of the 7-
segment display,
push BS1 once, or
leave the unit as is for
at least 2 hours.
Push BS1 once and
shift to the parameter
BS1 BS2 BS3
indication mode.
Push BS2 a number
of times, depending
BS1 BS2 BS3
on the indication you
want to confirm:
▪ Suction superheat
(refrigeration):
21
times
▪ Suction
temperature
(refrigeration):
9
times
▪ Subcool: 27 times
To return to the initial
state, for example if
you pushed a wrong
number of times,
push BS1 once.
Push BS3 once, and
indicate each of the
BS1 BS2 BS3
selected parameters.
Push BS1 once to
return to the initial
BS1 BS2 BS3
state.
Installation and operation manual
36
Root cause
Countermeasu
when out of
re
range
Lack of amount
Charge
of refrigerant (in
additional
(a)
case of high
refrigerant
.
suction
temperature,
≥18°C).
Lack of amount
Charge
of refrigerant (in
additional
(a)
case of high
refrigerant
.
suction
temperature,
≥18°C).
7-segment display
—
The indication will
change:
The last 2 digits
indicate the number
of times you pushed.
For example, you
want to confirm
suction superheat:
For example, 7-
segment displays 12
if suction superheat is
12.
Check defrosting
Check if the indoor unit starts defrosting if the defrosting setting is
applied.
CAUTION
ALWAYS turn off the operation switch BEFORE turning off
the power supply.
17.4.2
Correcting after abnormal completion of
the test run
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit 7‑segment display. In
case of a displayed malfunction code, perform correcting actions as
explained in the malfunction code table. Carry out the test operation
again and confirm that the abnormality is properly corrected.
CAUTION
After the refrigerant is fully charged, do NOT turn off the
operation switch and power supply of the outdoor unit. This
prevents the safety valve actuation due to an increase in
internal
pressure
under
conditions.
When internal pressure rises, the outdoor unit can operate
by itself to reduce the internal pressure, even if no indoor
unit is operating.
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
17.5
Logbook
In accordance with the applicable legislation, the installer must
provide a logbook upon installation of the system. The logbook shall
be updated following any maintenance or repair of the system. In
Europe, EN378 provides the necessary guidance for this logbook.
Content of the logbook
The following information must be provided:
▪ Details of the maintenance and repair works
▪ Quantities and kind of (new, reused, recycled, reclaimed)
refrigerant which have been charged on each occasion
▪ Quantities of refrigerant which have been transferred from the
system on each occasion
▪ Results of any analysis of a reused refrigerant
▪ Source of reused refrigerant
▪ Changes and replacements of components of the system
▪ Results of all periodic routine tests
▪ Significant periods of non-use
Furthermore, you can add:
▪ Instructions for shutting down the system in case of an emergency
▪ Name and address of fire department, police and hospital
▪ Name, address and day and night telephone numbers for
obtaining service
Location of the logbook
The logbook shall either be kept in the machinery room, or the data
shall be stored digitally by the operator with a printout in the
machinery room, in which case the information shall be accessible to
the competent person when servicing or testing.
CO₂ Conveni-Pack outdoor unit and capacity up unit
high
ambient
temperature
LRYEN10A7Y1+LRNUN5A7Y1
4P605461-1B – 2020.08
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Troubleshooting
