2 Components
Service manual
38
EBLQ+EDLQ011~W1 + EBLQ+EDLQ011~0W1
+ EK(2)CB EKMB9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
a
a
Screw
5
Install the 3‑way valve knob on the 3‑way valve motor.
a
b
a
3-way valve knob
b
3-way valve motor
6
Route the 3‑way valve motor harness through the grommet in
the switch box.
7
Connect the 3‑way valve motor connector to the hydro PCB.
8
Install new tie straps to fix the 3‑way valve harness.
Is the problem solved?
Action
Yes
No further actions required.
No
Return to the troubleshooting of
the specific error and continue
with the next procedure.
2.2
4-way valve
2.2.1
Checking procedures
INFORMATION
It is recommended to perform the checks in the listed
order.
To perform a mechanical check of the 4-way valve
Prerequisite:
Turn OFF the unit via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
1
Disconnect the 4‑way valve connector from the main PCB.
2
Turn ON the power of the unit.
INFORMATION
Default position of the 4‑way valve is Heating mode.
3
Activate Heating operation via the user interface.
Water temperature after plate
type heat exchanger of the
indoor unit:
Action
Drops
4‑way valve is stuck in cooling
position. Replace the 4‑way
valve body, see
Rises
Skip the next step of this
procedure.
Does NOT rise/drop
Perform the next step of this
procedure.
4
Connect a manifold to one of the service ports of the refrigerant
circuit and check the pressure.
Refrigerant pressure
measured?
Action
Yes
Perform a position check of the
4‑way valve, see
No
Leaks may be found in the
refrigerant circuit. Perform a
pressure test of the refrigerant
circuit, see
CAUTION
To prevent damage due to liquid entering the compressor,
the steps below MUST ONLY be executed once.
CAUTION
Make sure you have a pressure difference of at least 6 bar
between the high and low pressure when performing this
test.
5
Place a round permanent magnet on the core of the solenoid
valve and listen to the 4‑way valve.
Does the 4‑way valve switch?
Action
Yes
Perform an electrical check of the
4‑way valve, see
No
Replace the 4‑way valve body,
see
.
To perform an electrical check of the 4-way valve
1
First perform a mechanical check of the 4‑way valve, see
"2.2.1 Checking procedures" on page 38
2
Activate Cooling operation via the user interface.
3
Measure the voltage on the 4‑way valve connector pins 1-3.
The measured voltage MUST be 220~240 V AC during
switching and 12 V DC after switching of the 4‑way valve.
Is the measured voltage
correct?
Action
Yes
Skip the next step of this
procedure.