Chillers rarely fail without warning. Pressures creep, approach temperatures rise, current goes up a little each week. A chiller maintenance checklist with a daily log sheet catches that drift before a summer trip. Download the CSV and adapt the columns to the chiller type. Follow the maker's procedures and limits.
Chiller maintenance checklist: daily log sheet
- Date, time, operator
- Chilled water in and out temperature
- Condenser water in and out temperature (water-cooled)
- Evaporator and condenser refrigerant pressure
- Compressor motor current, voltage
- Oil level and oil pressure
- Running hours; alarms or trips since last reading
Monthly checks
- Review the log for trends; compare approach temperatures with design
- Water strainers cleaned
- Flow switches and safety controls tested
- Leak check around joints and valves
Quarterly and yearly checks
- Electrical terminations tightened, contactors inspected (isolated)
- Condenser tubes cleaned as per schedule (water-cooled); coils for air-cooled
- Oil analysis and filter change as per the maker
- Cooling tower and water treatment reviewed
Reading the log
- Rising condenser pressure with stable load: fouled tubes or cooling tower problem.
- Falling evaporator pressure: possible low refrigerant or flow issue.
- Rising current at the same load: mechanical or electrical issue to investigate.
Readings on the AMC record
ServicePilot keeps the chiller as equipment on the site, creates AMC visits on schedule and stores the checklist and readings on each job. For the rest of the plant room, see the HVAC maintenance checklist.
