Repair Procedures; High Pressure Switch; Checking Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

1 Check the LEDs of the extension PCB.
a b
a LED 2
b LED 5
2 LED 2 MUST be blinking.
LED 2 blinking?
Yes
No
3 If LED 5 is blinking, a communication error between the
extension PCB (A4P) and the hydro PCB (A1P) has occurred.
Perform following checks:
▪ Check the connectors on the PCB,
▪ Check the connection between PCB A4P (X10A) and A6P
(X10A),
▪ Check the connection between PCB A2P (X1A) and A1P
(X10A).
Are all checks performed
above correct?
Yes
No
2.12.2

Repair procedures

To remove the extension PCB
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 Disconnect all connectors and the ground wire from the
extension PCB.
2 Carefully pull the extension PCB and unlatch the PCB supports
one by one using a small pliers.
3 Remove the extension PCB from the switch box.
4 To install the extension
procedures" on page 57.
To install the extension PCB
1 Install the extension PCB in the correct location in the switch
box.
2 Latch the PCB supports using a small pliers to fix the extension
PCB.
3 Connect all connectors and ground wire to the extension PCB.
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Action
Proceed with the next step of the
procedure.
Replace the extension PCB, see
"2.12.2 Repair procedures" on
page 57.
Action
Replace the extension PCB, see
"2.12.2 Repair procedures" on
page 57.
Return to the troubleshooting of
the specific error and continue
with the next step.
"2.19 Plate
PCB, see "2.12.2 Repair
Is the problem solved?
Yes
No
2.13

High pressure switch

2.13.1

Checking procedures

To perform an electrical check of the high
pressure switch
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 Disconnect the high pressure switch connector from the PCB.
2 Recuperate the refrigerant from the refrigerant circuit, see
"3.2.2 Repair procedures" on
3 Fill the refrigerant circuit with nitrogen until pressurized at
46 bar.
4 Measure contacts between the pins 1‑2 of the high pressure
switch connector. The switch MUST be open.
5 Lower the pressure of the nitrogen in the refrigerant circuit to
36 bar.
6 Measure again contacts between the pins 1‑2 of the high
pressure switch connector. The switch MUST be closed.
Both high pressure switch
connector measurements are
correct?
Yes
No
2.13.2 Repair procedures
To remove the high pressure switch
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
Prerequisite: If needed, remove any parts to create more space for
the removal of the high pressure switch.
1 Disconnect the connector from the high pressure switch.
2 Components
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
"2.19 Plate
page 93.
Then
High pressure switch is OK.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
Replace the high pressure
switch, see "2.13.2 Repair
procedures" on page 57.
"2.19 Plate
page 93.
Service manual
57