Daikin Altherma EKHBH Series Service Manual page 129

ESIE06-03
Troubleshooting
Change for a specified amount of
fresh refrigerant.
See also:
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Part 3 – Troubleshooting
Any thermistor
disconnected?
NO
Stop valve closed?
NO
Check for gas leakage.
Oil oozing at
relay pipe connections?
NO
Oil oozing at
internal piping?
NO
Check No. 04
Electronic expansion valve
functioning?
YES
Gas shortage error
again?
NO
"Check No.04" on page 3-51
"Check No.06" on page 3-53
YES
∗ Discharge pipe thermistor
∗ Hydro-box / outdoor unit heat exchanger thermistor
∗ Room temperature thermistor
∗ Outdoor air thermistor
YES
YES
YES
Compressor vibrating
too much?
NO
NO
YES
Malfunctioning
Check No. 06
Check the thermistors.
Functioning
Error Codes: System Malfunctions
Reconnect in position.
Open the stop valve.
Repair the pipe flare or replace
the square union.
Check the power transistor
YES
harness for looseness. Correct it
as required. Also replace
cracked pipe if any.
Check the pipes for improper
contact. Correct as required.
Also replace cracked pipe if any.
Replace the electronic
expansion valve.
Replace the room temperature
or outdoor air thermistor, or the
hydro-box or outdoor unit heat
exchanger thermistor.
(1) Replace the PCB.
(2) Replace the compressor.
Procedure complete.
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