Daikin LREN8A7Y1B, Инструкция по установке и эксплуатации

Страница: 131 / 156

20 | Commissioning
Installer and user reference guide
131
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
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
"23.3.1 Error codes:
Overview" [
4
140].
5 Turn ON the operation switch of the outdoor unit. The compressors and fan
motors start to operate.
6 Check that the unit functions without error codes. See "20.5.1 Test run
checks" [
4
131].
7 Check that the showcases and blower coils cool correctly.
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.
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 on the PCB of the capacity up unit 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
"23.3.1 Error codes:
Overview" [
4
140].
3 Check that the unit functions without error codes. See "20.5.1 Test run
checks" [
4
131].
4 Check that the showcases and blower coils cool correctly.
20.5.1 Test run checks
Check visually
Check the following:
▪ Showcases and blower coils are blowing cold air.
▪ The temperature of the refrigerated 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.
Operation parameters
For a stable operation of the unit, each of the following parameters should be in its
range.