A9" Indoor Unit: Malfunction Of Moving Part Of; Electronic Expansion Valve (Y1E) - Panasonic U-4..6ML5XPQ Service Manual

Troubleshooting by Indication on the Remote Controller
A9
" " Indoor Unit:
3.7

Electronic Expansion Valve (Y1E)

A9
Remote
Controller
Display
Applicable All indoor unit models
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
150
Malfunction of Moving Part of
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
NO
NO
YES
Urban Multi ML5 · Mini UM · Heat Pump
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.
Troubleshooting
(V2781)