Daikin EUWA/Y5-30HB/C(Z) - Control of Function of 4 Way Valve(EUWY5-30 HB;C)

ESIE98–06A Troubleshooting
Part 3 – Troubleshooting 3–31
33
4
5
1
4.8 Control of function of 4 way valve(EUWY5-30HB/C)
Four-way valve The following drawing indicates the main components necessary to execute good troubleshooting:
Normal cooling The following table explains the normal condition of the four-way valve in cooling mode:
Normal heating The following table explains the normal condition of the four-way valve in heating mode:
65
4
1
2
3
discharge tube from the
compressor
suction tube to the
compressor
tube to the
inside coil
tube to the
outside coil
left pilot back
capillary tube
right pilot back
capillary tube
coil
bleed hole
compressor
piston
needle
pilot body
piston body
Discharge
tube
1
Suction
tube
2
Tube to
inside coil
3
Tube to
outside coil
4
Left pilot back
capillary tube
5
Right pilot front
capillary tube
6
Hot Cool Cool as in
column 2
Hot as in
column 1
Temperature of
valve body
Temperature of
valve body
Discharge
tube
1
Suction
tube
2
Tube to
inside coil
3
Tube to
outside coil
4
Left pilot back
capillary tube
5
Right pilot front
capillary tube
6
Hot Cool Hot as in
column 1
Cool as in
column 2
Temperature of
valve body
Temperature of
valve body