17 Commissioning
Installation and operation manual
40
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
1~2 min
8~10 min
b
a
a
Power ON
b
Default situation
Switching between modes
Use BS1 to switch between the default situation, mode 1 and
mode 2.
BS1 [5 s]
BS1
BS1
BS1
a
b
c
a
Default situation (H1P OFF)
b
Mode 1 (H1P flashing)
c
Mode 2 (H1P ON)
BS1
Press BS1
BS1 [5 s]
Press BS1 for at least 5 s
INFORMATION
If you get confused in the middle of the process, press BS1
to return to the default situation.
16.1.5
To set field settings
Prerequisite:
Start from the default setting in the 7-segment display.
See also
"16.1.3 Field setting components"
39]. If anything but the
default setting is visible, push BS1 once.
1
To select the desired mode, push BS1. See also
BS1 BS2 BS3
MODEMODE
MODE
MODE
▪ For mode 1: push BS1 and release it at once.
▪ For mode 2: push BS1 and keep it depressed for more than
5 seconds.
Result:
The selected mode appears on the 7-segment display.
2
To select the desired setting, push BS2 the same amount of
times as the number of the setting you need. For example: push
2 times for setting 2.
BS1 BS2 BS3
MODEMODE
MODE
MODE
Result:
The setting appears on the 7-segment display, [Mode
Setting] is addressed.
3
Push BS3 1 time to access the selected setting's value.
Result:
The display shows the status of the setting (depending
on the actual field situation).
BS1 BS2 BS3
MODEMODE
MODE
MODE
4
To change the value of the setting, push BS2 the same amount
of times as the number of the value you need. For example:
push 2 times for value 2.
Result:
The value appears on the 7-segment display.
5
Push BS3 1 time to validate the value change.
6
Push BS3 again to start operation with the chosen value.
7
Push BS1 to quit and return to the initial status.
WARNING
If any part of system is already (accidentally) powered on,
setting [2-21] on the outdoor unit can be set to value 1 to
open the expansion valves (E1V, E2V, E7V, E8V, E15V).
17
Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run MUST be
performed according to the procedures described below.
17.1
Precautions when commissioning
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT ONLY the
outdoor unit, but the connected indoor unit will operate as
well. Working on an indoor unit while performing a test
operation is dangerous.
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 high ambient temperature
conditions.
When internal pressure rises, the outdoor unit can operate
by itself to reduce the internal pressure, even if no indoor
unit is operating.
NOTICE
Turn ON the power 6 hours before operation in order to
have power running to the crankcase heater and to protect
the compressor.
During test operation, the outdoor unit and the indoor units will start
up. Make sure that the preparations of all indoor units are finished
(field piping, electrical wiring, air purge, ...). See installation manual
of the indoor units for details.
17.2
Checklist before commissioning
1
After the installation of the unit, check the items listed below.
2
Close the unit.
3
Power up the unit.
You have read the complete installation and operation
instructions described in the
installer and user reference
guide
.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
