Repair Procedures - Daikin Altherma EBLQ011CAV3 Service Manual

Is the measured voltage on the
DC fan motor connector on the
inverter PCB correct?
Yes
No
5 Measure the voltage on the DC fan motor connector pins 4-3.
The measured voltage MUST be 15 V DC.
Is the measured voltage
correct?
Yes
No
6 Disconnect the DC fan motor connector from the inverter PCB
and measure the voltage on the connector pins 4-3 of the
connector on the inverter PCB. The voltage MUST be 15 V DC.
Is the measured voltage on the
DC fan motor connector on the
inverter PCB correct?
Yes
No
7 Measure the voltage on the DC fan motor connector pins 4-2.
The measured voltage should be 0~10 V DC. It should not be
0 V DC.
Is the measured voltage
0 V DC?
Yes
No
8 Turn OFF the unit via the user interface.
9 Manually (slowly) rotate the fan blade propeller 1 turn and
measure the voltage on the DC fan motor connector pins 1-2. 4
pulses of 5 V DC MUST be measured.
Pulses are measured during
fan blade propeller rotation?
Yes
No
Problem solved?
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Action
Replace the DC fan motor
assembly, see "2.18.2 Repair
procedures" on page 75.
Replace the inverter PCB, see
"2.15 Inverter PCB" on page 61.
Action
Skip the next step of this
procedure.
Perform the next step of this
procedure.
Action
Replace the DC fan motor
assembly, see "2.18.2 Repair
procedures" on page 75.
Replace the inverter PCB, see
"2.15 Inverter PCB" on page 61.
Action
Replace the inverter PCB, see
"2.15 Inverter PCB" on page 61.
Replace the DC fan motor
assembly, see "2.18.2 Repair
procedures" on page 75.
Action
Replace the main PCB, see
"2.17 Main PCB" on page 66.
Replace the DC fan motor, see
"2.18.2 Repair procedures" on
page 75.
Action
No further actions required.
Return to the troubleshooting of
the specific error and continue
with the next procedure.
2.18.2

Repair procedures

To remove the propeller fan blade assembly
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 Remove the nuts that fix the air discharge grill and remove the
air discharge grill.
a b
a Nut
b Air discharge grill
2 Remove the nut that fixes the propeller fan blade assembly.
a b
5
2 Components
"2.19 Plate
a
Service manual
75