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Components
Service manual
163
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
To perform a mechanical check of the expansion valve
Prerequisite:
Power OFF the unit for 3 minutes. Then turn ON the unit and listen to
the expansion valve assembly. If the expansion valve does NOT make a latching
sound, continue with the electrical check of the expansion valve, see
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
1
Remove the expansion valve insulation (if applicable) and visually check:
▪
For oil drops around the expansion valve. Locate and fix as necessary.
▪
Pipes for signs of damage. Replace pipes as needed.
▪
Coil wires for signs of damage. Replace expansion valve coil as needed. See
166].
2
Remove the expansion valve coil from the expansion valve body, see
3
Slide the expansion valve magnet over the expansion valve body and gently
rotate the magnet clockwise/counterclockwise to manually close/open the
expansion valve. Listen to check if the valve is closing/opening and manually
close the valve when check is done.
INFORMATION
After the check, remove the magnet from the expansion valve body and install the
expansion valve coil on the expansion valve body. Make sure that the expansion
valve coil is firmly slid onto the expansion valve body.
INFORMATION
It is highly recommended to perform a power reset after checking the valve using a
magnet.
Does the expansion valve open?
Action
Yes
Perform an electrical check of the
expansion valve, see
162].
No
Replace the expansion valve body, see
To perform an electrical check of the expansion valve
1
First perform a mechanical check of the expansion valve, see
162].
2
Disconnect the electrical connector of the expansion valve coil from the
appropriate PCB and measure the resistance of all windings (between the pins
of each phase (wire) and the common wire) using a multi meter. All
measurements MUST be approximately the same.
INFORMATION
Below are shown examples of the resistance measurements in which the common
wire is connected to pin 5 or to pin 6 of the expansion valve coil connector.
Connections may differ according to the type of expansion valve.
draft – 31/05/2022 15:53
Summary of Contents for EBLA04E V Series
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