A9" Ahu: Malfunction Of Moving Part Of Electronic Expansion Valve (Y1E) - Daikin ERQ Service Manual

ESIE09-05
A9
3.5 " " AHU: Malfunction of Moving Part of Electronic
Expansion Valve (Y1E)
A9
Remote
Controller
Display
Applicable
All AHU models
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Malfunction of moving part of electronic expansion valve
Defect of AHU PC board
Defect of connecting cable
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
The
electronic
expansion valve is
NO
connected to X7A of the
AHU PC
board.
YES
Normal
when coil check
NO
(∗1) of the moving part of
the electronic expansion
valve is
checked.
YES
The connecting
YES
cable is short-circuited or
disconnected.
NO
Troubleshooting by Indication on the Remote Controller
After connecting, turn the power
supply off and then back on.
Replace the moving part of the
electronic expansion valve.
Replace the connecting cable.
If you turn the power supply off
and turn on again, and it still does
not help, replace the AHU PC
board.
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(V2781)
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