Fujitsu Waterstage WS G140DC6 Series - Annual Maintenance Services; Hydraulic Circuit Maintenance; Outdoor Unit Maintenance; Electrical Checks

Split system (Single phase and 3-phase type)
92 Maintenance Document 1544-1
5 Annual Maintenance Services
5.1 Hydraulic Circuit
 clean filter (if any)
 inspect heating system (system pressure,
purging, leak test)
 inspect expansion vessel (preload with nitrogen
at 1 bar)
 fix any leaks
5.2 Outdoor unit
 clean heat exchanger
 clean refrigeration and ventilation compartment
 check for correct condensation drain
 conduct refrigeration circuit leak test (required if
charged > 2 kg)
5.3 Electrical
 Inspect connections and tighten where
appropriate
 Check condition of wires and boards
5.4 Operating checks
 conduct refrigeration readings at temperatures
 in case of malfunction, install pressure gauges
for refrigeration diagnosis
 check voltage, current and control