2 Components
Service manual
51
EBLQ+EDLQ011~W1 + EBLQ+EDLQ011~0W1
+ EK(2)CB EKMB9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
a
Faston connectors
INFORMATION
Note the position of the Faston connectors on the
compressor wire terminals to allow correct connection
during installation.
5
Measure the resistance between the compressor motor
windings U-V, V-W and U-W. All measurements MUST be the
same.
6
Re-connect the Faston connectors and run the compressor.
7
Measure the current in each phase U-V, V-W and U-W. All
measurements MUST be the same.
Compressor motor winding
measurements are correct?
Action
Yes
Perform an insulation check of
the compressor, see
"2.8.1 Checking procedures" on
page 50
.
No
Replace the compressor, see
"2.8.2 Repair procedures" on
page 51
.
To perform an insulation check of the compressor
Prerequisite:
First perform an electrical check of the compressor,
"2.8.1 Checking procedures" on page 50
Prerequisite:
Turn OFF the unit via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
.
1
Open the compressor insulation.
WARNING
The smoothing capacitor MUST discharge below 10 V DC
before disconnecting the Faston connectors from the
compressor wiring terminals. Risk of electrocution.
2
Remove the cover of the compressor wire terminals.
a
Compressor wire terminals cover
3
Disconnect the Faston connectors from the compressor wire
terminals U, V and W.
a
Faston connectors
INFORMATION
Note the position of the Faston connectors on the
compressor wire terminals to allow correct connection
during installation.
4
Set the Megger voltage to 500 V DC or 1000 V DC.
5
Connect the Megger ground test lead directly to the compressor
ground wire.
CAUTION
Do NOT connect the Megger ground test lead to any other
ground wire.
6
Measure the insulation resistance between the following
terminals. The measured insulation resistance MUST be
>3 MΩ.
▪ U–ground,
▪ V–ground,
▪ W–ground.
Compressor insulation
measurements are correct?
Action
Yes
Perform a check of the
compressor overload protection,
see
..
No
Replace the compressor, see
"2.8.2 Repair procedures" on
page 51
2.8.2
Repair procedures
To remove the compressor
Prerequisite:
Turn OFF the unit via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
.
Prerequisite:
Recuperate the refrigerant from the refrigerant circuit,
see
"3.2.2 Repair procedures" on page 93
1
If needed, remove any parts to create more space for the
removal of the compressor.
2
Remove the cover of the compressor wire terminals.
a
Compressor wire terminals cover
3
Disconnect the Faston connectors from the compressor wire
terminals U, V and W.
a
b
b
a
Faston connectors
c
Compressor pipe
INFORMATION
Note the position of the Faston connectors on the
compressor wire terminals to allow correct connection
during installation.
4
Cut the compressor pipes (below the soldered joint) using a
pipe cutter.
5
Remove the 3 nuts and remove the compressor from the unit.