Repair Procedures - Daikin altherma 3 M Service Manual

3.24.2 Repair procedures

To remove impurities from the water pump housing
To remove the water pump motor
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
a
a Pump speed
b PWM signal (duty cycle) [%]
Is the measured PWM signal correct?
Yes
No
15 Unplug the water pump connector X25A and measure the PWM signal
between pins 1‑2 on the hydro PCB. The measured signal MUST be as
mentioned in the previous step.
Is the measured PWM signal correct?
Yes
No
Prerequisite: Remove
4
procedures" [ 279].
1 Remove any impurities or objects that may block the water pump.
2 Install the water pump housing, see
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Disconnect the connectors from the water pump motor.
b
Action
Replace the water pump housing, see
"3.24.2 Repair
Continue with the next step.
Action
Replace the PWM signal harness
between the water pump and the hydro
PCB, see
procedures" [
Perform a check of the hydro PCB, see
"3.12.1 Checking
the water pump
"3.24.2 Repair
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
3 Components
|
4
procedures" [ 279].
"3.24.2 Repair
4
279].
4
procedures" [
housing, see "3.24.2 Repair
4
procedures" [ 279].
4
"3.17 Plate work" [ 230].
160].
Service manual
279