Daikin Altherma 3 H HT ECH2O Service Manual page 119

Repair procedures
To remove the 3-way valve motor
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
ESIE22-11A – 2023.06
1 Manually put the 3‑way valve in the domestic hot water position by rotating
the 3‑way valve body axle.
CAUTION
Mark the original position of the 3‑way valve body axle. At the end of this procedure,
manually put the 3‑way valve back in its original position by rotating the 3‑way valve
body axle.
2 Use a contact thermometer to measure the temperature at the domestic hot
water inlet, space heating inlet and the 3‑way valve exit.
Inlet
Domestic hot water
Space heating
3 Manually put the 3‑way valve in the space heating position by rotating the
3‑way valve body axle 180° counterclockwise.
c
a
a Domestic hot water inlet
b Space heating inlet
c Exit
d 3‑way valve body axle in space heating position
4 Use a contact thermometer to measure the temperature at the domestic hot
water inlet, space heating inlet and the 3‑way valve exit.
Inlet
Domestic hot water
Space heating
Both temperature checks performed
above are correct?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Temperature
Same as the 3-way valve exit
Lower than the 3-way valve exit
b
d
Temperature
Lower than the 3-way valve exit
Same as the 3-way valve exit
Action
3‑way valve body is OK, 3‑way valve
motor broken. Install a new 3‑way valve
motor, see "Repair
3‑way valve body broken, replace the
3‑way valve body, see
4
procedures" [ 119].
4 Components
|
4
procedures" [ 119].
"Repair
Service manual
119