Daikin Altherma 3 M - Page 220

3 | Components
Service manual
220
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Pulses are measured during fan blade
propeller rotation?
Action
Yes Continue with the next step.
No Replace the DC fan motor, see "Repair
procedures"[4220].
15 Turn OFF the unit via the user interface.
16 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see "To prevent
electrical hazards"[4285].
17 Disconnect the DC fan motor connector X106A from the appropriate PCB.
18 Using a multi meter in diode test function, check the DC fan motor in
reference with the table below.
Comm VDC
7 4 3 2 1
7 / 0.800V 1.300V OL OL
4 OL / 0.800V OL OL
3 OL 0.475V / OL OL
2 OL 1.125V 1.470V / OL
1 OL 1.700V 1.875V OL /
INFORMATION
The measured values may deviate from the listed values. If you measure significantly
less or close to 0 where a value is shown in the table, an internal short‑circuit is
present. When OL is expected, NO voltage MUST be measured.
Are the measured voltages correct? Action
Yes Perform a check of the main PCB, see
"Checking procedures"[4171].
No Replace the DC fan motor, see "Repair
procedures"[4220].
Problem solved?
After all checking procedures listed above have been performed:
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.
Repair procedures
To remove the propeller fan blade assembly
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.