Repair Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

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?
Yes
No
To perform an insulation check of the compressor
Prerequisite: First perform an electrical check of the compressor,
see "2.8.1 Checking procedures" on
Prerequisite: Turn OFF the unit via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
work" on page 77.
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.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Action
Perform an insulation check of
the compressor, see
"2.8.1 Checking procedures" on
page 50.
Replace the compressor, see
"2.8.2 Repair procedures" on
page 51.
page 50.
"2.19 Plate
Compressor insulation
measurements are correct?
Yes
No
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
work" on page 77.
Prerequisite: Recuperate the refrigerant from the refrigerant circuit,
see "3.2.2 Repair procedures" on
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.
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.
2 Components
Action
Perform a check of the
compressor overload protection,
see "2.8.1 Checking
procedures" on page 50..
Replace the compressor, see
"2.8.2 Repair procedures" on
page 51.
"2.19 Plate
page 93.
a
Service manual
b
51