ESIE15-08B
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Part 2. Troubleshooting
4. Component checklist - Water Circuit
Page 82
19/07/16
Daikin Altherma Monobloc CA
7.
Measure the voltage on X4A: pin 2 (white) - pin 3 (blue) (= flow sensor output signal). If the measured voltage is outside the
expected range, replace the water flow sensor B1L; if the measured voltage does not correspond with the displayed flow on
the user interface, replace PCB A1P.
8.
Measure the voltage on X4A: pin 3 (blue) - pin 4 (brown) (= flow sensor power supply). If no +5 VDC is measured, measure
again directly on the PCB. If +5 VDC is measured, replace the flow sensor; if no +5 VDC is measured, replace PCB A1P.
X4A
0
0
0.55
10
5
20
30
40
50
flow
(l/min)
output voltage
(V)
1
2
3
3.5
4
5
Flow sensor B1L