A proper service report allows for year-over-year operational comparison and helps in the early diagnosis of problems.
Hydraulic parameters
Flow, return, ΔT, water pressure, and flow rate.
Electrical parameters
Voltage, current, consumption, and protection status.
Refrigeration circuit
Basic pressures, temperatures, and alarms where required.
Equipment condition
Cleanliness of exchangers, filters, fans, and observations for any wear and tear.