Repair Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

Is the measured voltage
correct?
No
4 Disconnect the 4‑way valve connector from the main PCB and
measure the voltage on the connector pins 1-3 of the connector
on the main PCB. The voltage MUST be 220~240 V AC during
switching and 12 V DC after switching.
Is the measured voltage on the
4‑way valve connector of the
main PCB correct?
Yes
No
5 Disconnect the 4‑way valve connector from the main PCB and
measure the resistance of the 4‑way valve coil. The resistance
MUST be 585 Ω.
Is the measured resistance
correct?
Yes
No
6 De-activate Cooling and activate Heating operation via the user
interface.
7 Measure the temperature after the plate type heat exchanger.
Does the measured
temperature rise?
Yes
No
To perform a position check of the 4-way valve
1 First perform a mechanical check of the 4‑way valve, see
"2.2.1 Checking procedures" on
2 Slide a magnet over the front and rear side of the 4‑way valve
body. The magnet MUST be attracted in the positions a or b,
but NOT in positions c.
a a
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Action
Perform the next step of this
procedure.
Action
Replace the 4‑way valve coil, see
"2.2.2 Repair procedures" on
page 39.
Replace the main PCB, see
"2.17 Main PCB" on page 66.
Action
Perform the next step of this
procedure.
Replace the 4‑way valve coil, see
"2.2.2 Repair procedures" on
page 39.
Action
Perform a position check of the
4‑way valve, see "2.2.1 Checking
procedures" on page 38.
Replace the main PCB, see
"2.17 Main PCB" on page 66.
page 38.
b
c c
a Magnet attracted
b Magnet attracted
c Magnet NOT attracted
Magnet is attracted in the
correct positions of the 4‑way
valve?
Yes
No
2.2.2

Repair procedures

To remove the 4-way valve coil
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 77.
Prerequisite: If needed, remove any parts to create more space for
the removal of the 4‑way valve coil.
1 Remove the screw and remove the 4‑way valve coil from the
4‑way valve body.
c
a Screw
b 4‑way valve coil
c 4‑way valve body
2 Cut all tie straps that fix the 4‑way valve coil harness.
3 Disconnect the 4‑way valve coil connector from the main PCB.
2 Components
b
Action
The 4‑way valve is OK. Return to
the troubleshooting of the
specific error and continue with
the next procedure.
Replace the 4‑way valve body,
see "2.2.2 Repair procedures" on
page 39.
"2.19 Plate
a b
Service manual
39