Daikin Altherma EBLQ011CA3V3 - Repair Procedures

2 Components
Service manual
51
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
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,
see "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 "2.19 Plate
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.
Compressor insulation
measurements are correct?
Action
Yes Perform a check of the
compressor overload protection,
see "2.8.1Checking
procedures"on page50..
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 "2.19 Plate
work"on page77.
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.
ab
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.