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Components
Service manual
100
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
Are the measured voltages correct?
Action
Yes
Perform a position check of the 3‑way
valve (automatic procedure), see
99].
No
Continue with the next step.
8
Measure the voltage on connector X17A pin 5 and 7.
Result:
The measured voltage MUST be 230 V AC.
Is the measured voltage on connector
X17A correct?
Action
Yes
Continue with the next step.
No
Perform a check of the hydro PCB, see
9
Disconnect connector X20A from the hydro PCB.
10
Activate
DHW operation
via the user interface.
11
Measure the resistance between X20A pin 3 and 5.
Result:
The measured resistance MUST be 0 Ω.
12
De-activate
DHW operation
and activate
Space operation
via the user
interface.
13
Measure the resistance between X20A pin 1 and 5.
Result:
The measured resistance MUST be 0 Ω.
Is the resistance for both
measurements on connector X20A
correct?
Action
Yes
Relay KVR is switching correctly. Correct
the wiring between X20A, X17A and
X2M, see
281].
No
Relay KVR is NOT switching correctly.
Replace the hydro PCB, see
To perform a position check of the 3-way valve (automatic procedure)
Prerequisite:
First perform an electrical check of the 3‑way valve, see
1
Turn ON the power of the unit.
2
Activate
DHW operation
via the user interface.
3
Use a contact thermometer to measure the temperature at the 3‑way valve
water inlet, the domestic hot water exit and the space heating exit.
Exit
Temperature
Domestic hot water
Same as the 3-way valve inlet
Space heating
"Much" lower than the 3-way valve inlet
4
The 3-way valve can be installed in accordance with one of the following four
configurations. Water inlet and exit locations differ depending on the
configuration used in your unit.
draft – 31/05/2022 15:53
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