Tracking daily operations is half the battle when it comes to maintenance. Keeping a detailed log is the most efficient means of understanding how your chiller is doing. These logs should include necessary information like flow rates, operating temperatures, pressures, and fluid levels. There are many downloadable log sheets to keep these numbers up to date. Remote monitoring systems are also very popular in supporting daily logs on machinery. It requires less time and can update as frequently as necessary since it is often an automated system. Many times, remote monitoring systems can automate insight reports as well, for real-time diagnostics on your chillers. Performing chiller maintenance is a must. Below are a few items to add to your general maintenance checklist to ensure you don’t miss a step. Note refrigerant and oil levels

• Inspect fan control system 
• Check evaporator water temperature differential 
• Measure condenser fan motor volts/amps, where applicable 
• Check water flow through evaporator 
• Measure condenser and evaporator pressures 
• Check operation of controls 
• Leak-Measure and verify refrigerant, water, oil, etc. 
• Check safety control settings 
• Check operating control settings 
• Inspect compressor motor operation 
• Inspect compressor motor efficiency 
• Check compressor motor volts/amps 
• Secure all cap tubes from chafing 
• Check crankcase heater operation 
• Check cap control setting/operation 
• Inspect condenser/evaporator controls air and water 
• Inspect moisture indicator 
• Check low/high and oil pressures 
• Inspect fan and assembly rotations, etc. 
• Check chill water temperature control 
• Inspect belts, sheaves – tension and alignment 
• Check fan speed controllers 
• Listen and look for unusual noises/vibrations 
• Check structural integrity of unit
• Compare tonnage being produced vs electricity being consumed
• Analyze compressor oil for metals or other particulars

Note: Chiller maintenance will vary from manufacturer to manufacturer and should be assessed on a case by case basis.