Troubleshooting For Bp Unit; Malfunction Of Electronic Expansion Valve - Daikin E-Series Service Manual

Troubleshooting for BP Unit

6. Troubleshooting for BP Unit

6.1

Malfunction of Electronic Expansion Valve

A9
Remote
Controller
Display
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
350
Faulty harness of electronic expansion valve
Incorrect connectors connection of electronic expansion valve
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 PCB of
the faulty
part?
YES
Is the
resistance of the
electronic expansion
valve coil normal?
(46±4Ω/20˚C)
YES
NO
NO
NO
SiAU18-715
Keep using as it is. (Could
be outside error other than
malfunction.)
Correct the connection.
Electronic expansion valve
coil faulty
Replace BP unit PCB of the
applicable part.
(Q0545)
Troubleshooting