Daikin Altherma EKHBH Series Service Manual page 132

Error Codes: System Malfunctions
1
Troubleshooting
3 3
4
5
Caution
3–46
Check the hydro-box - outdoor unit
connection wires.
Is there any wiring
error?
NO
Check the outdoor unit's LED A.
Is LED A flashing?
YES
Check the voltage of the hydro-box -
outdoor unit connection wires
between No. 1 and No. 2, and
between No 2 and No. 3.
Is the voltage 0 V?
NO
Check No. 10
Check power supply waveform.
Is there any
disturbance?
YES
See also: "Check No.10" on page 3-58
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
YES
NO
YES
NO
ESIE06-03
Correct the hydro-box -
outdoor unit connection wires.
Diagnose the outdoor unit.
Replace the connection wires
between the indoor and
outdoor units.
Replace hydro-box control
PCB.
Locate the cause of the
disturbance of the power
supply waveform, and
correct it.
Part 3 – Troubleshooting