E9 " Indoor Unit: Malfunction Of Moving Part Of Electronic Expansion Valve (K2E) R-134A Circuit - Daikin ALTHERMA HT Service Manual

Troubleshooting by Indication on the Remote Controller
3.22 "E9 " Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (K2E) R-134a circuit
E9
Remote Control
Display
Subcode 17
All indoor units
Applicable
Expansion valve on R-134a
Models
Check disconnection of connector
Method of
Check continuity of expansion valve coil
Malfunction
Detection
Error is generated under no common power supply when the power is on.
Malfunction
Decision
Conditions
 Defect of moving part of electronic expansion valve
Supposed
 Defect of indoor unit PC board (A4P)
Causes
 Defect of connecting cable
Troubleshooting
162
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
Turn power supply off, and
turn power supply on again.
Return to normal?
NO
Electronic
expansion valve is
connected to X21A of unit
PC board (A4P).
YES
Normal
when coil
check (*) of the
moving part of the electronic
expansion valve is
checked.
YES
The
connecting cable is
short-circuited or
disconnected.
NO
YES
NO
NO
YES
ESIE09-08B
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 the connecting cable.
Replace indoor unit PC board
(A4P).
(V3067)
Troubleshooting