20
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Commissioning
Installer and user reference guide
128
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
20 Commissioning
In this chapter
To perform a test run (7-segment display) ............................................................................................................................ 130
20.5.1
20.1 Overview: Commissioning
Typical workflow
Commissioning typically consists of the following stages:
1
Checking the "Checklist before commissioning".
2
Performing a test run.
3
If necessary, correcting errors after abnormal completion of the test run.
4
Operating the system.
20.2 Precautions when commissioning
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
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
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.
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.
