--- title: "Chiller Maintenance Checklist and Log Sheet | ServicePilot" description: "Chiller maintenance checklist and daily log sheet for HVAC teams: pressures, temperatures, current, oil, alarms, condenser and cooling tower checks. Free Excel." url: https://servicepilot.in/blog/ac-service/chiller-maintenance-checklist/ canonical: https://servicepilot.in/blog/ac-service/chiller-maintenance-checklist/ site: ServicePilot section: Blog articles updated: 2026-10-30 keywords: "chiller maintenance checklist" language: en-IN --- AC & HVAC Service # Chiller Maintenance Checklist and Daily Log Sheet By the ServicePilot Team · Published 30-10-2026 Chiller maintenance checklist in Excel Photo by [Joel Muniz](https://unsplash.com/photos/L5sEqpQukJI?utm_source=servicepilot.in&utm_medium=referral) on [Unsplash](https://unsplash.com/?utm_source=servicepilot.in&utm_medium=referral) A chiller maintenance checklist has two parts: a daily log sheet (chilled and condenser water in and out temperatures, refrigerant pressures, motor current, oil level and pressure, alarms) and a periodic checklist (strainers, condenser tubes, electrical terminations, safety controls, water treatment, cooling tower). Record readings every shift; a slow drift is the early warning. [Download the chiller log sheet (CSV, opens in Excel) CSV, opens in Excel or Google Sheets · 1 KB · free to edit Download](https://servicepilot.in/downloads/chiller-maintenance-log-sheet.csv) 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](https://servicepilot.in/features/amc-contracts/) visits on schedule and stores the checklist and readings on each [job](https://servicepilot.in/features/jobs-and-scheduling/). For the rest of the plant room, see the [HVAC maintenance checklist](https://servicepilot.in/blog/ac-service/hvac-maintenance-checklist/). [In ServicePilot See AC service management software in ServicePilot How ServicePilot handles this for your business, with a free demo.](https://servicepilot.in/industries/ac-and-appliance-service/) Frequently asked questions ## Questions people ask **Q: How often should chiller readings be logged?** A: Many sites log every shift or every few hours while running. The AMC engineer reviews the log on each visit. **Q: What does approach temperature tell me?** A: A rising approach often means fouled tubes or low refrigerant; compare against the maker's design values. **Q: Who should service a chiller?** A: Trained engineers following the maker's procedures, with refrigerant handled as the law requires. **Q: Should the log be kept on paper?** A: Paper at the plant room is fine; enter the key readings into the job on each AMC visit so trends are kept. ## Related articles [AC & HVAC Service AC Installation Charges: Standard Price and Extras AC installation charges for AC service firms: standard split and window installation, copper pipe per foot, stands, drilling, extras and a worked price example. 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