Daikin FTX25JVEA9 Service Manual page 280

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