Split system (Single phase and 3-phase type)
Maintenance Document 1544-1 39
2.4.4 Service parts information 4 : Outdoor unit solenoid valve (SV)
Check point 1 : Check connections
Check connection of connector
(Loose connector or open cable)
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.
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.
SV
SOLENOID
COIL (INJ)
BLUE
BLUE
1 2
1 2
CN501
Injection is inactive
Pipe (In) TEMP. HI.
Pipe (Out) TEMP. Normal
Injection is active
Pipe (In) TEMP.= Pipe (Out) TEMP.
Pipe (In)
HI TEMP.
Pipe (In)
HI TEMP.
CLOSE
OPEN
Pipe (Out)
Normal TEMP.
Pipe (Out)
HI TEMP.
SOLENOIDE COIL
SOLENOIDE COIL
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