44 VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
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6
1
: do not reach
into the fan while the fan
wheel is running.
X
Check bearings noise. X
Measure the current and power consumption. X
Cleaning to preserve the function. X
X
Clean or replace if necessary. X
Carry out controls more frequently in dusty environments. X
Clean or replace if necessary.
X
Carry out controls more frequently in dusty environments. X
Check for proper and functionally correct installation and
surrounding conditions.
X
Check the function of the LEDs of the display’s control system
and the alarms.
X
Check the connections for electrical and mechanical function. X
Check the functional elements (e.g. operational controls and
display devices).
X
Check the electrical/electronic input signals (e.g. sensors, remote
controllers, command variable) for compliance with nominal
values.
X
Check control function, control signals and safety chains. X
Adjust control function and control signals. X
See Chapter 3.2.
electrical
cables and electrical
components of the air
conditioner are under voltage.
Before operating on the
electrical connections, make
sure there is no voltage through
a voltmeter or a phase detector.
Wait at least minutes to
remove the electrical box
panels and access to the
parts under tension.
Check the power supply on all phases. X
Check the connections for electrical and mechanical function. X
Check the power supply at all terminals. X
Measure power consumption at all connected consumers. X
Set, adjust and tighten the functional elements (e.g. operational
controls and display devices).
X
Check safety equipment, e.g. thermal switch. X
Replace fuses (every years) X
Check protective covers for completeness. X
: Fluoride
refrigerants increase the
subject to restrictions and
norms, according to the national
and European regulations.
Measure the working pressures and temperatures (to be done by
a refrigeration technician).
X
Check the power consumption, measure head temperature and
check for possible abnormal operating sounds
X
Make sure that there is no frost building up on the evaporator and
compressor.
X
Check function of all regulating devices (power regulators, valves,
etc.).
X
Check safety devices for function. If the quantity of the refrigerant
is not enough, detect the leakage if any. Then reclaim, void, repair
and charge.
X
If the quantity of refrigerant is not enough, it needs to be reclaimed
Check oil level at the sight glass (where sight glass is available). X
Carry out a test to check humidity inside oil X
Check crankcase heater for function. X
Check digital modulation - solenoid valve X
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