Malfunction Of Moving Part Of Electronic Expansion Valve - Daikin Super Multi Plus D-Series Service Manual

SiEBE18-526
7.6 Malfunction of Moving Part of Electronic Expansion
Valve
E9
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Check disconnection of connector
Check continuity of expansion valve coil
Malfunction
Detection
Malfunction
Error is generated under no common power supply when the power is on.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗1 Coil check method for the moving part of the electronic expansion valve
Disconnect the electronic expansion valve from the PCB and check the continuity between the
connector pins.
Normal condition
1. White
2. Yellow
3. Orange
4. Blue
5. Red
6. Brown
Troubleshooting
Defect of moving part of electronic expansion valve
Defect of outdoor unit PCB (A1P)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn power supply off, and
turn power supply on again.
Return to normal?
NO
Electronic
expansion valve is
connected to X26A and
X28A of outdoor unit
PCB
(A1P).
YES
Normal
when coil
check (∗1) of the moving
part of the electronic
expansion valve is
checked.
YES
Pin No. 1. White
: Continuity Approx. 300Ω,
YES
NO
NO
2. Yellow 3. Orange
×
×
: Continuity Approx. 150Ω,
Troubleshooting for Outdoor Unit
External factor other than
malfunction (for example, noise
etc.).
After connecting, turn the power
off and then back on again.
Replace the moving part of the
electronic expansion valve.
Replace outdoor unit PCB A1P.
4. Blue 5. Red
×
×
×
×
×: No continuity
(Q0426)
6. Brown
×
×
×
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