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| Liebert® XDC | User Manual
60
Appendix IV: List of Maintenance Inspection Items
(Semi-annual)
Date: _____________________________
Model: _____________________________
Filter net of terminal:
___ 1. Check if the filter net is damaged or blocked
___ 2. Check the filter net blockage switch
___ 3. Clean the filter net
Terminal fan part
___ 1. Whether the fan impeller is deformed
___ 2. Whether the bearing is worn
___ 3. Is the fan running sound abnormal?
___ 4. Check and fix the circuit connectors
Compressor part
___ 1. Check for leaks
___ 2. Listen to the running sound and observe the running
vibration
___ 3. Check and fix the circuit connectors
___ 4. Compressor drive
Air-cooled condenser
___ 1. Cleanliness of condenser fins
___ 2. Whether the fan mounting base is firm
___ 3. Whether the fan cushion is aged or damaged
___ 4. Whether the lightning protection board is still effective (if
there is a lightning protection board. It is best to check once a
week for the thunderstorm season)
___ 5. Speed controller voltage regulation function
___ 6. The temperature switch is at the specified setting value
___ 7. The refrigerant pipeline is properly supported
___ 8. Check and fix the circuit connector
Signature_________________________________________________________
Note: Please copy this form for record archive.
Prepared by: ____________________________
Serial No.: ______________________________
Water-cooled condenser (if used)
___ 1. Cleaning the water piping system
___ 2. Check the function of the electric ball valve
___ 3. Check the water system for leakage
Cooling cyclic system
___ 1. Check the suction pressure and superheat
___ 2. Check the exhaust pressure and condensing super-
cooling
___ 3. Check the refrigerant pipeline
___ 4. Check the moisture content of the system (observe
through sight glass)
___ 5. Check the terminal electronic expansion valve
___ 6. Check if you need to add refrigerant (observe
through sight glass)
Electrical control part
___ 1. Check the fuse and MCB
___ 2. Check and tighten circuit connectors
___ 3. Check the control program
___ 4. Check the closing condition of the contactor
