Troubleshooting For Bp Unit; Electronic Expansion Valve Abnormality - Daikin Super Multi Plus E-Series FTXG25EV1BW Service Manual

Troubleshooting for BP Unit

6. Troubleshooting for BP Unit

6.1

Electronic Expansion Valve Abnormality

A9
Remote
Controller
Display
Method of Detection by checking continuity and lack of connector
Malfunction
Detection
Malfunction No voltage applied when turning the power supply on
Decision
Conditions
Supposed
Causes
Troubleshooting
Turn the power supply off
once and then back on.
376
Broken harness of electronic expansion valve coil
Incorrect connection of connectors for electronic expansion valve coil
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
NO
Is malfunction
re-generated?
YES
Is the
electronic
NO
expansion valve coil
connected
properly?
YES
Is the
resistance of
NO
the electronic expansion
valve coil normal?
(46 ± 4 Ω /
20°C)
YES
SiBE18-821_C
Keep using as it is.
(Could be external
factor other than
malfunction.)
Correct the
connection.
Replace the electronic
expansion valve coil.
Replace the BP unit
PCB.
(R13012)
Troubleshooting