Repair Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

2 Components
V (DC)
3.4
3.5
3.6
3.7
3.8
3.9
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...
Is +5 V DC
Is not +5 V DC
5 Unplug the connector and measure the voltage on the hydro
PCB.
If measured voltage...
Is +5 V DC
Is not +5 V DC
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...
Outside the expected range
Inside the expected range
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
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.
Service manual
80
2
Detected pressure kg/cm
41.41
42.84
44.27
45.70
47.12
48.55
Then
Skip the next step in the
procedure
Continue with the next step in the
procedure
Then
Replace the refrigerant pressure
sensor, see "2.21.2 Repair
procedures" on page 80.
Replace the hydro PCB, see
"2.14.2 Repair procedures" on
page 60.
Then
Replace the refrigerant pressure
sensor, see "2.21.2 Repair
procedures" on page 80.
Refrigerant pressure sensor is
OK. Return to the
troubleshooting of the specific
error and continue with the next
procedure.
"2.19 Plate
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
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 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
"3.2.2 Repair procedures" on
Is the problem solved?
Yes
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
a
"2.21.2 Repair
a
to the requirements, see
page 93.
Action
No further actions required.
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
b
b