Daikin FTX25JVEA9, Service Manual

Page: 280 / 410

Si18-201 Troubleshooting - Outdoor Unit Related
Service Diagnosis 267
3.3.5 Malfunction of Electronic Expansion Valve
Outdoor Unit
Indication
E9
Method of
Malfunction
Detection Detection by checking continuity and lack of connector.
Malfunction
Decision
Conditions Malfunction is determined by no common voltage applied when turning the power supply on.
Supposed
Causes
"
Faulty electronic expansion valve
"
Faulty harness of electronic expansion valve
"
Incorrect connectors connection of electronic expansion valve
"
Outside cause (noise, etc.)
Troubleshooting
Note: The applicable part of motorized valve is displayed via rotary switch [01].
Turn the power supply off once
and then back on.
Keep using as it is. (Could
be outside error other than
malfunction.)
Correct the connection.
Electronic expansion valve
faulty
Replace control PC board
of the applicable part.
Is malfunction
re-generated?
Is the
resistance of the
electronic expansion
valve coil normal?
(48
Ω
)
(MF024)
NO
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
YES
Is the
electronic
expansion valve coil
connected to PC board
of the faulty
part?
NO