52 Chapter 7 Troubleshooting
Liebert CRV+ Series Air Conditioner User Manual
Affiliated table 2: maintenance table (six-month)
Inspection date:
___________________ Prepared by: ___________________
Unit model: ___________________ Unit SN: ___________________
Filters
___ 1. Check for clogging or damage
___ 2. Check the filter clogging switch
___ 3. Clean the filter
Fan
___ 1. Fan blades are not distorted
___ 2. The bearings are not worn out
___ 3. Check and fasten the circuit connections
Compressor
___ 1. Check for leakage
___ 2. Listen to the operation sound, observe the
operation vibration
___ 3. Check and fasten the circuit connections
Air-cooled condenser (if used)
___ 1. Check the fins cleanness
___ 2. The fan base should be firm
___ 3. The fan vibration absorber is not
deteriorated or damaged
___ 4. The SPD board should be effective (in the
storming seasons, the SPD board should be check
once a week)
___ 5. Check the voltage regulating function of the
rotation speed controller
___ 6. The temperature switch is set at the required
position
___ 7. The refrigerant pipes are properly supported
___ 8. Check and fasten the circuit connections
Refrigeration cycling system
___ 1. Check the suction pressure and suction
superheat degree
___ 2. Check the discharge pressure and
condensing subcooling degree
___ 3. Check the refrigerant pipes
___ 4. Check the moisture content (through the
sight glass)
___ 5 Check the electronic expansion valve
___ 6. Check whether or not refrigerant should be
added through the sight glass
Heating system
___ 1. Check the re-heater operation
___ 2. Check the erosion situation of the
components
___ 3. Check and fasten the circuit connections
Electric control part
___ 1. Check the fuse and the MCB
___ 2. Check and fasten the circuit connections
___ 3. Check the control program
___ 4. Check the contactor action
Signature _________________________________________________________
Note: copy this table for filing.
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