Chapter 6.0 Maintenance
6.1 Preventative Maintenance Tasks
Table 6-1 Preventative Maintenance Tasks identifies tasks that should be performed on a regular basis to maintain
optimal performance of the system.
Table 6-1 Preventative Maintenance Tasks
Item
Task
Frequency
6 Months
12 Months Other
General
Inspections
Check physical condition of compressor.
P
Check for excessive vibration from other rotating equipment.
P
Check for oil in the system. The compressor must operate in an
oil-free environment. Ensure all oil is removed from the system.
P
Compressor
Inspections
Connect to the compressor using the Service Monitoring Tools
software and download fault and event logs. Review and save
logs for future reference.
P
Connect to the compressor using the Service Monitoring Tools
software and perform a calibration. Do not save the calibration to
EEPROM if the compressor has been operating correctly. Create
and save a Calibration Report for future reference.
P
Inspect the Capacitor Relief Membrane. Replace as necessary.
P
Electrical
Inspections
Check main power supply voltages.
P
Ensure electrical terminals are tight.
P
Check for signs of hot spots/discoloration on power cables.
P
Check amperages during operation are as per design.
P
Check DC bus voltage.
P
Replace DC Capacitor Bus Bar Assembly. (Refer to Section 4.21 DC
Capacitor Bus Bar Assembly on page 165)
Energized: 10
years/Denergized: 5
years
Check operation of all system safety devices and interlocks.
P
Perform moisture-prevention measures.
P
Replace Soft Start fan. (Refer to Section 4.14.8 Soft Start Fan
Removal and Installation on page 123)
5 years, refer to
Customer Notification
B-CN-041-EN
Electronic
Inspections
Ensure all communication cables are secure.
P
Ensure all electronic modules are secure.
P
Check physical condition of all exposed PCBs.
P
Check all exposed PCBs for dust build-up and clean if necessary.
P
Check discharge and suction pressure/temperature sensors for
accuracy against calibrated pressure/temperature gauges.
P
Refrigeration
Check operation of IGV assembly.
P
Check system refrigerant charge.
P
Check superheat/level control, if applicable.
P
Check system and liquid line to ensure sufficient sub-cooled
refrigerant is available at liquid line adapter.
P
Verify discharge check valve operation.
If there is backward gas flow immediately after stopping the
compressor, replace the check valve.
P
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