Unit Solenoid Valve (Sv) - Fujitsu WATERSTAGE 112 Maintenance Document

Heat Pump, Split System, Single Service, 3 phase
4.4.4 Service parts information 4 : Outdoor unit solenoid valve (SV)
Check point 1 : Check connections
Check connection of connector
(Loose connector or open cable)
SOLENOID
COIL (INJ)
Check point 4 : check opening and closing operation valve
Depending on the injection activity, check if valve is operating normally.
(When valve opens, ther is no temperature difference between inlet and outlet)
• If the valve closes by removing the connector of the
valve which does not close, it is considered to be
Main PCB failure. Replace Main PCB.
• If it does not closeby removing connector, there is a
possibility of (1) clogging by dirt, or (2) deformation
by the heat at the time of solenoid valve installation.
In this case, replace solenoid valve.
56
BLUE
BLUE
Check point 2 : Check solenoid coil
Remove connector and check if coil is open
(normal resistance value of each coil : 1495+/-
7%)
If resistance value is abnormal, replace
solenoid coil.
Check point 3 : Check voltage from main
PCB
Remove connector and check the voltage
(AC230V).
If the voltage does not appear, replace Main
PCB.
Maintenance Document 1394-1