Daikin Altherma EKHBH Series Service Manual page 126

Error Codes: Outdoor Units
1
Troubleshooting 2
3 3
4
5
Caution
3–40
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
Change for a specified amount of
fresh refrigerant.
Gas shortage error again?
NO
See also:
"Check No.04" on page 3-51
"Check No.06" on page 3-53
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
YES
∗ Discharge pipe thermistor
∗ Hydro-box / outdoor unit heat exchanger thermistor
* Outdoor air thermistor
YES
YES
YES
Compressor vibrating
too much?
NO NO
YES
Malfunctioning
Check No. 06
Check the thermistors.
Functioning
ESIE06-03
Reconnect in position.
Open the stop valve.
Repair the pipe flare or replace
the square union.
Check the power transistor
harness for looseness. Correct
YES
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 outdoor air
thermistor, or the hydro-box or
outdoor unit heat exchanger
thermistor.
(1) Replace the PCB.
(2) Replace the compressor.
Procedure complete
Part 3 – Troubleshooting