Daikin altherma 3 M Service Manual page 97

To perform an electrical check of the 4-way valve
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Is the 4‑way valve coil firmly fixed and
not visually damaged?
Yes
No
1 First perform a mechanical check of the 4-way valve, see
4
procedures" [ 96].
2 Unplug the 4-way valve connector from the appropriate PCB.
3 Measure the resistance of the 4-way valve coil between the pins of the 4-way
valve connector.
Result: The measured value must be:
Unit
1‑phase outdoor unit
3‑phase outdoor unit
Is the measured value correct?
Yes
No
When outdoor unit is combined with Heating + Cooling indoor unit
INFORMATION
This procedure is ONLY possible when the outdoor temperature is within the
temperature range for both Heating and Cooling operation mode. See the
databook on Business Portal for the temperature range of the operation modes.
1 Connect the 4‑way valve connector to the appropriate PCB.
2 Turn ON the power using the respective circuit breaker.
3 Activate Heating operation via the user interface.
4 With the 4‑way valve connector connected to the PCB, measure the voltage
on the 4‑way valve connection of the PCB.
Result: The measured voltage MUST be:
Unit
1‑phase outdoor unit
3‑phase outdoor unit
5 De-activate Heating and activate Cooling operation via the user interface.
6 Measure the voltage on the 4‑way valve connection on the PCB.
Result: The measured voltage MUST be:
Unit
1‑phase outdoor unit
3‑phase outdoor unit
3
Action
Perform an electrical check of the 4‑way
valve, see "3.2.1 Checking
4
procedures" [ 96].
Fix or replace the 4‑way valve coil, see
"3.2.2 Repair procedures" [
Coil resistance
1,4 kΩ ± 10%
520~600 Ω
Action
Continue with the next step.
Replace the 4‑way valve coil, see
"3.2.2 Repair procedures" [
Voltage
230 V AC
12 V DC
Voltage
0 V AC
0 V DC
Components
|
4
101].
"3.2.1 Checking
4
101].
Service manual
97