Daikin Altherma 3 M - Page 205

3 | Components
Service manual
205
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
4 Measure the output voltage of the noise filter PCB on connectors X801A and
X802A on the main PCB.
Result: All measurements MUST be 230VAC ± 10%.
Is the measured output voltage
correct?
Action
Yes Noise filter PCB is OK. No need to
perform other check procedures for the
noise filter PCB.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
No Continue with the next step.
5 Measure the power supply voltage to the noise filter PCB between the wires
L1‑L2‑L3 on the terminal X1M.
Result: All measured voltages MUST be 400VAC ± 10%.
6 Measure the power supply voltage to the noise filter PCB between each phase
and N on the terminal X1M.
Result: All measured voltages MUST be 230VAC ± 10%.
Are the measured voltages correct? Action
Yes Return to "Checking
procedures"[4204] of the PCB and
continue with the next procedure.
No Adjust the power supply to the unit, see
"4.1.2Repair procedures"[4286].
To perform a power check of the noise filter PCB
Prerequisite: First perform a functionality check of the noise filter PCB, see
"Checking procedures"[4204].
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see "3.17Plate work"[4230].
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see "To prevent
electrical hazards"[4285].
2 Remove the 2 screws from the main PCB heat sink cover.
3 Lift and pull the cover to remove it from the heat sink.