Daikin Altherma HT - Page 209

ESIE09-08B Troubleshooting by Indication on the Remote Controller
Troubleshooting 197
Troubleshooting
1: Inverter’s Power Transistors Check : Refer to information on P.243~245.
 : Refer to information on P.211.
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
YES
NO
YES
NO
YES
Monitor the voltage
(Instantaneous voltage drop)
YES
NO
When the compressor is running,
measure the voltage between + and -
of electrolytic capacitor (C+, C-).
(S2605)
Replace the fan motor
NO
Check the inverter power
transistor. *1
Replace the inverter PC board
assy (A2P).
Check for the PC board
conditions.
In case of significant failure,
the PC board may have got
faulty due to faulty
compressor. Consequently,
even if the PC board is
replaced, it may get faulty
again. To avoid that, recheck
the compressor for grounding
and for any broken wires.
Furthermore, even after
replacing the PC board, carry
out inspections on the
compressor.
Correct the power supply
voltages.
If L2 or Phase N is open, replace
the switch box.
Have the
power supply
voltages between L1 and L2,
L2 and L3, and L1 and L3 fallen within
the range of 380 to 415V±10% (50 Hz) and
between L and N within the range
of 220 to 240V±10%
(50 Hz)?
Is the power
transistor faulty?
Check No.3
Is the resistance above standard
value?
Is the
measured voltage 220
VDC or more?
Replace the inverter PC board
(A2P).
Check No.3