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Daikin CMSQ200A7W1B Service Manual: A9" Indoor Unit: Malfunction Of Moving Part Of; Electronic Expansion Valve (y1e)

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SiBE28-805
A9
"
" Indoor Unit: Malfunction of Moving Part of
3.5
Electronic Expansion Valve (Y1E)
A9
Remote
Controller
Display
Applicable
All indoor unit models
Models
Method of
Use a microcomputer to check the electronic expansion valve for coil conditions.
Malfunction
Detection
Malfunction
When the pin input of the electronic expansion valve is not normal while in the initialization of
the microcomputer.
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Malfunction of moving part of electronic expansion valve
Defect of indoor unit 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
connected to X7A of the
indoor unit PC
board.
YES
Normal
when coil check
(∗1) of the moving part of
the electronic expansion
valve is
checked.
YES
The connecting
cable is short-circuited or
disconnected.
NO
Troubleshooting by Indication on the Remote Controller
NO
NO
YES
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 indoor unit
PC board.
143

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Table Of Contents

Troubleshooting

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