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Commissioning
Installer and user reference guide
116
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
The remote controller displays …
Description
Nothing
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.
Operation parameters
For a stable operation of the unit, each of the following parameters should be in its
range.
Parameter
Range
Root cause when
out of range
Countermeasure
Suction superheat
(refrigeration)
̥≥10 K
Incorrect selection
of expansion valve
at refrigeration
side.
Set the correct
target super heat
(SH) value of
showcase or
blower coil.
Suction
temperature
(refrigeration)
≤18°C
Lack of amount of
refrigerant.
Charge additional
refrigerant
(a)
.
Incorrect selection
of expansion valve
at refrigeration
side.
Set the correct
target super heat
(SH) value of
showcase or
blower coil.
Subcool
≥2 K
Lack of amount of
refrigerant in
outdoor unit (in
case of high
suction
temperature,
≥18°C).
Charge additional
refrigerant
(a)
.
(if applicable)
Liquid temperature
of the capacity up
unit
≤5°C
Lack of amount of
refrigerant in
outdoor unit (in
case of high
suction
temperature,
≥18°C).
Charge additional
refrigerant
(a)
.
(a)
Charge additional refrigerant until all parameters are within their range. See
