Daikin Altherma EBLQ011CA3V3 - Repair Procedures

2 Components
Service manual
80
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
V (DC) Detected pressure kg/cm
2
3.4 41.41
3.5 42.84
3.6 44.27
3.7 45.70
3.8 47.12
3.9 48.55
3 Turn ON the power of the unit.
4 Measure the voltage between the pins 3‑4 (pressure sensor
power supply) of the refrigerant pressure sensor connector.
If measured voltage… Then
Is +5VDC Skip the next step in the
procedure
Is not +5VDC Continue with the next step in the
procedure
5 Unplug the connector and measure the voltage on the hydro
PCB.
If measured voltage… Then
Is +5VDC Replace the refrigerant pressure
sensor, see "2.21.2Repair
procedures"on page80.
Is not +5VDC Replace the hydro PCB, see
"2.14.2Repair procedures"on
page60.
6 Measure the output voltage between the pins 1‑3 of the
refrigerant pressure sensor connector (when connected to the
PCB).
If measured voltage is… Then
Outside the expected range Replace the refrigerant pressure
sensor, see "2.21.2Repair
procedures"on page80.
Inside the expected range Refrigerant pressure sensor is
OK. Return to the
troubleshooting of the specific
error and continue with the next
procedure.
2.21.2 Repair procedures
To remove the refrigerant pressure sensor
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: Perform a Pump down procedure. See the installer
reference guide for the correct procedure.
Prerequisite: If needed, remove any parts to create more space for
the removal of the refrigerant pressure sensor.
1 Cut all tie straps that fix the refrigerant pressure sensor
harness.
2 Cut the refrigerant pressure sensor pipe using a pipe cutter.
a
b
a Refrigerant pressure sensor
b Refrigerant pressure sensor pipe
3 Disconnect the refrigerant pressure sensor connector from the
hydro PCB.
4 To install the refrigerant pressure sensor, see "2.21.2 Repair
procedures"on page80.
To install the refrigerant pressure sensor
1 Install the refrigerant pressure sensor in the correct location.
2 Wrap a wet rag around the refrigerant pressure sensor and
solder the refrigerant pressure sensor pipe to the refrigerant
pressure sensor.
a
b
a Refrigerant pressure sensor
b Refrigerant pressure sensor pipe
CAUTION
Overheating the pressure sensor will damage or destroy it.
3 Route the refrigerant pressure sensor harness towards the
hydro PCB.
4 Connect the refrigerant pressure sensor connector to the hydro
PCB.
5 Fix the refrigerant pressure sensor harness using new tie
straps.
6 Add refrigerant according to the requirements, see
"3.2.2Repair procedures"on page93.
Is the problem solved? Action
Yes No further actions required.