Vertiv™ | Liebert® DM | Appendix Manual
122
Appendix VI: Routine Maintenance Inspection Items
(Semi-annually)
Date: _____________________________ Prepared by: _____________________________
Model: _____________________________ Serial number: _____________________________
Routine Maintenance Inspection Items Checklist (Semi-annually)
Components Inspection Particular Remark
Compressor
Check for any signs of oil leaks
Listen to running sounds and observe operation vibrations
Refrigeration
cycle system
Check suction pressure, exhaust pressure and suction superheat are as per
setpoints
Check if the evaporator is functioning normally
Check system circulation and moisture content (observed through sight)
Check whether there is an obvious temperature dierence before and after
drying the filter
Check Thermal Expansion Valve (TXV) is firmly connected
Check the refrigerant piping. The refrigerant line must have a suitable bracket
and must not be placed against the wall, floor or fixed frame.
Air-cooled
condenser
Check if the condenser coil is clogged, clean immediately if it is blocked.
Check if the motor is firmly mounted
Check if there is any distortions in impeller rotation, also check bearings if they
are in good condition
Check if the refrigerant piping are properly supported
Electrical board
Check all electrical connections are firmly tightened
Check the surface of the circuit board for signs of corrosion
Electrical heater Check heating element for signs of corrosion or burning
Signature_________________________________________________________
Note: Please copy this table for record keeping purposes.
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