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

Split system (Single phase and 3-phase type)

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)
92
5.3

Electrical


Inspect connections
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
Maintenance Document 1544-1
and tighten where